CN117916438A

CN117916438A - Grid beam system for flat-panel form

Info

Publication number: CN117916438A
Application number: CN202280060509.8A
Authority: CN
Inventors: 阿尼布拉塔·劳思; K·阿伦; C·拉奥; A·沙拉纳帕; 安库什·拉霍德
Original assignee: Peri Europe
Current assignee: Peri Europe
Priority date: 2021-08-03
Filing date: 2022-08-03
Publication date: 2024-04-19

Abstract

The invention relates to a grid beam flat template (100), which comprises a main beam (104), a secondary beam (106), a multi-stage movable head unit (102) and a strut (118). The multi-stage movable head unit (102) provides up to or more than six connection points for the primary beams (104) and the secondary beams (106). The multi-stage movable head unit (102) allows for the construction of additional structures that would otherwise require a separate movable head or adapter, thereby reducing the overall cost associated with the form. Furthermore, the multi-stage activity head unit (102) enables the creation of platforms wherever needed. On the other hand, the adapter (116, 301) prevents the cladding member from seizing so that the beam can be removed when the concrete reaches the required strength and the load can be borne by the post (118).

Description

Grid beam system for flat-panel form

Technical Field

The invention relates to a grid beam flat panel system comprising a main beam, a secondary beam, a movable head adapter, an adapter secured to the secondary beam, a closure beam and a strut.

Background

Forms or shells are temporary molds for the production of a predetermined structure (e.g., a column, wall, or roof) from concrete. One type of form used to fabricate horizontal building elements (e.g., roofs) is referred to as a flat panel form. The flat panel form is formed into a grid by combining four perimeter beams, which may be main beams or secondary beams, that are joined together to form the perimeter of the grid and supported on movable heads that are secured to the support posts and the support posts that are sufficiently supported below as desired. The grille further includes a plurality of secondary beams coupled to the oppositely facing perimeter beams. The plywood is secured to the top to form a flat structure on which concrete may be poured. During its operation, the form remains assembled until the desired concrete strength is achieved.

Conventionally, the movable head is configured to allow connection with four perimeter beams, such that the movable head serves as a junction point for the grille. There are various limitations associated with current active head connectors. For example, conventional movable heads are configured to allow four beams to be mounted at the same level, thereby limiting the types of structures that can be produced. On the other hand, in case that a separate structure (e.g., a platform for an operator) or a cantilever part, which is a working space, is to be built using the same type of movable head, additional movable heads and special sub-beams are required to form separate grids, or movable head attachments and special sub-beams are required to manage the level differences, thereby increasing the infrastructure cost of the form. Further, the use of additional forms requires more time to assemble the forms, thereby delaying the construction of the concrete structure. Moreover, the use of multiple movable heads increases the complexity of the template, making it more susceptible to failure.

Another limitation of the present system is that the cantilever and standard grid require the use of different formwork elements.

Another limitation is that plywood is caught during the period of time that the structure is completed in an early strike scenario until the form is allowed to be removed.

Yet another limitation is that the primary and secondary beams need to be secured against lifting so as not to allow them to move out during execution.

Yet another limitation is that the primary and secondary beams have different latching mechanisms that require separate locking mechanisms, which increase the overall cost of manufacturing and maintaining such inventory. Furthermore, mounting the secondary beams to the main beams is a time consuming process requiring special tools to connect the main beams to the secondary beams.

Disclosure of Invention

This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description of the invention. This summary is not intended to identify key or essential inventive concepts of the invention, nor is it intended to be used to identify the scope of the invention.

The invention relates to an aspect of a grid beam flat template system, which comprises a main beam, a secondary beam and a multi-stage movable head unit which can be used for early form removal. The primary and secondary beams are provided with end hooks having a double wall construction with a cavity therebetween for latching to the movable head. The movable head has a plurality of fly panels at different levels including attachment into cavities of double wall end hooks of the primary and/or secondary beams. This enables easy installation and removal of the primary and secondary beams. The hooks of the movable head fly plates prevent the inclination of the main beams and the secondary beams during installation. Furthermore, the movable head has a stabilizing tube which abuts against the end hooks, which prevents the grid formed by the main beams and the secondary beams from shaking.

In one embodiment, a multi-stage movable head unit for a form having a standard grid and a cantilever grid formed by coupling primary and secondary beams is disclosed. The multi-stage movable head unit includes: a substrate; a rod orthogonally attached to the substrate; and a fly plate slidably mounted on the rod. The fly plate includes a pair of first attachment portions adapted to receive one of the primary and secondary beams. Further, the flight plate includes a second attachment portion and a third attachment portion adapted to receive one of the primary and secondary beams. In one example, the pair of first and second attachment portions are coplanar at a first level, and the third attachment portion is positioned at a second level.

In one embodiment, a form is disclosed that includes a plurality of struts, a plurality of primary beams, and a plurality of secondary beams. The form also includes a plurality of multi-stage movable head units mounted on the plurality of struts and adapted to be coupled to at least one of the plurality of primary beams and the plurality of secondary beams to form a first grid and a second grid, each multi-stage movable head unit including a base plate coupled to the struts, a mast orthogonally attached to the base plate, a fly plate slidably mounted on the mast. The fly plate includes a pair of first attachment portions adapted to receive one of the primary and secondary beams, a pair of flanges having second and third attachment portions adapted to receive one of the primary and secondary beams, wherein the pair of first and second attachment portions are coplanar at a first level and the pair of third attachment portions are positioned at a second level.

In one embodiment, a multi-stage activity head unit is disclosed. Unlike conventional movable heads, the six connection points of the movable head enable standard and cantilever grids to be formed using the same components at different levels. The fly-plate is designed so that the main beams can be connected at two different levels, thus enabling the same secondary beams to be used for both standard and cantilever grids. In one example, the spacing between the two levels may be equal to the depth of the secondary beam. The movable head unit has six attachment portions, four on the top fly plate and the remaining two on the lower fly plate. Further, the hooks provide interference areas to prevent tilting of the primary and secondary beams attached thereto. Furthermore, the movable head unit has a stabilizing tube which abuts against an end hook of the main beam or the sub beam to prevent the main beam and the sub beam from shaking with respect to the movable head unit, thereby stabilizing the grill.

In one example, the main body of the main beam has a top surface with two downward lips and two bottom upward lips on its sides, creating a cavity that enables them to accommodate the connection of the self-rotating locking hooks of the secondary beam and prevent the removal and lifting of the double-walled end hooks of the other main beam. The girders have specially designed end connections with double wall end hooks that can be secured to the lip of the movable head or another girder and can be safely erected from the level below by hooking them to the movable head or another girder. Furthermore, the double wall end hooks swing to fit the hooks of the movable head tightly into their cavities and center the beam with the grid axis, thereby preventing lateral tilting of the main beam. The hooks are designed so as not to fall during erection and remain stable in an inclined position during safe erection from the underlying level. Once the beam swings up into place, the front wall of the double-walled end hook will abut the stabilization tube of the moving head, which gives stability to the grille against wobble. The main beam also has a bottom recess for receiving a connection with other accessories, such as T-bolts and the like.

In one embodiment, the secondary beam may be made of an aluminum extrusion with a specially designed end hook. It may also be made of a steel plate bent into a profiled shape. The secondary beams may also be formed from polymer or wood beams by replacing the aluminum extrusion with any custom length required, with the same end connection remaining intact due to its particular geometry. The secondary beams have specially designed end hooks on both sides that when hooked into the lips of the main beams, cause the beams to self-rotate to a locked position. The secondary beam can be safely erected from the underlying level using formwork assist without tipping or tipping from its position. The specially designed end hooks help to hook the secondary beam to the lip of the primary beam. When the secondary beam swings horizontally onto the opposite main beam, the beam automatically rotates downwardly from a horizontal position to a vertical position due to its own weight. Once the beam is in the upright position, the end hooks lock into the cavities of the main beam and are restrained against accidental removal and lifting. Since the end hook also has a double wall cavity that fits tightly into the hook plate of the fly plate of the movable head, the secondary beam can also be connected to the movable head. Moreover, these shaped portions have slots on their sides that are plugged with a press-fit polymer cap, which enables easy handling and prevents foreign particles from entering through the slots. Moreover, the profiled section has a top configuration of timber or polymer inserts for nailing and a bottom recess to accommodate connection with other accessories of the system, such as T-bolts and the like. The secondary beam without end hooks also serves as a normal formwork beam that can be used for various applications.

In another embodiment, a moving head adapter and additional adapters are disclosed that may be made of steel, aluminum, or a polymer to avoid plywood jams during early strokes of the form. In one example, the movable head adapter is used in an early strike scenario where it is desirable to avoid sticking of plywood. Other beam adapters may have two configurations. In one configuration, the adapter is formed as a hollow cube-shaped body having a rectangular cross-section. The adapter also includes flanges on either side. Further, each flange is configured to receive a cladding member on which concrete is poured. Further, the flange is designed such that when the cladding member is coupled to or supported on the flange, the top surface of the cladding member, the top side of the adapter, and the top surface of the movable head unit are coplanar along with the movable head adapter. Further, the movable head adapter secured to the movable head with the post will remain until the post is removed, while the secondary beam adapter secured to the secondary beam may be removed during demolding. Furthermore, the beam adapter may be fixed to the assembly of the movable head unit and the secondary beam, respectively, on the ground itself, and may swing from below during erection of the system. In another configuration, a closed beam is disclosed that will be located on top of the main beam in the joint between the two cladding members after erecting the form. The top of the closure beam is at the same level as the top of the cladding member. The end of the closure beam will be on top of the movable head and will remain fixed to the floor of the slab until the post is removed, while the remainder of the form can be removed.

In summary, a system with a multi-stage movable head according to the present invention allows the standard grid and cantilever grid to be built using the same components, otherwise a separate set of cantilever elements would be required, as well as some accessories or any other means with the movable head, thereby reducing the overall cost associated with the form. On the other hand, the adapter allows the main and secondary beams to be disassembled together with the plywood and avoids the plywood getting stuck during early blows, while the brace remains in place as a rear support. This ensures cycle time and productivity because the same elements can be used for the next slab casting.

To further clarify the advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. The invention will be described and explained with additional specificity and detail through the use of the accompanying drawings in which the invention is described.

Drawings

These and other features, aspects, and advantages of the present invention will become better understood when the following detailed description is read with reference to the accompanying drawings in which like characters represent like parts throughout the drawings, wherein:

FIG. 1A shows a perspective view of a template in a normal scenario with early blow according to an embodiment of the present invention;

FIG. 1B illustrates a plan view of a template in a normal scenario with early stroke according to an embodiment of the present invention;

FIG. 2A illustrates a cross section of a main beam and the installation of the main beam to a multi-stage activity head adapter according to an embodiment of the invention;

FIG. 2B illustrates a cross section of another primary beam with a double-walled end hook, installation of a primary beam to a multi-stage moving head adapter, and a cross section of a secondary beam, according to an embodiment of the present invention;

FIG. 2C illustrates a cross section of yet another main beam with a double-walled end hook, installation of the main beam to a multi-stage moving head adapter, and a cross section of another sub beam, in accordance with an embodiment of the present invention;

FIG. 2D illustrates a secondary beam according to an embodiment of the invention;

FIG. 3A illustrates a multi-stage activity head unit coupled to the main beam of FIG. 2A, according to an embodiment of the invention;

FIG. 3B illustrates the multi-stage activity head unit of FIG. 3A with an activity head adapter according to an embodiment of the invention;

FIG. 3C illustrates a multi-stage activity head unit with a hook attachment coupled to the main beam of FIG. 2B, according to an embodiment of the invention;

FIG. 3D illustrates the multi-stage activity head unit of FIG. 3C with an activity head adapter according to an embodiment of the invention;

FIG. 3E illustrates the installation of the main beam of FIG. 2B and the multi-stage activity head unit of FIG. 3C in accordance with an embodiment of the invention;

Fig. 3F illustrates a front view of an enlarged portion AA showing the installation of the double horn of the main beam of fig. 2B and the attachment portion of the multi-stage movable head unit of fig. 3C, according to an embodiment of the present invention;

FIG. 3G illustrates an assembled and exploded view of another multi-stage activity head unit having a double-wall hook-like attachment portion coupled to the main beam of FIG. 2C, in accordance with an embodiment of the present invention;

FIG. 3H illustrates the multi-stage activity head unit of FIG. 3G with an activity head adapter according to an embodiment of the invention;

FIG. 3I illustrates the multi-stage activity head unit of FIG. 3G with up to eight attachments according to an embodiment of the invention;

FIG. 3J illustrates a side view of the multi-stage activity head unit of FIG. 3G and the main beam of FIG. 2C, in accordance with an embodiment of the present invention;

FIG. 3K illustrates a top view of the multi-stage activity head unit of FIG. 3G and the main beam of FIG. 2C, in accordance with an embodiment of the present invention;

FIG. 4A illustrates a perspective view of a template in an early strike scenario without plywood jam using a secondary beam adapter, according to an embodiment of the invention;

FIG. 4B illustrates a top view of a template in an early strike scenario without plywood jam using secondary beam adapters, according to an embodiment of the invention;

FIG. 4C illustrates an arrangement of secondary beam adapters and a cross section of a secondary beam adapter according to an embodiment of the present invention;

FIG. 5A illustrates a perspective view of a template in an early strike scenario without plywood jam using a closed beam, according to an embodiment of the invention;

FIG. 5B illustrates an arrangement of closure beams and a cross section of a closure beam in accordance with an embodiment of the invention;

FIG. 6A illustrates the mounting of one end of the secondary beam of FIG. 3D to the primary beam of FIG. 2C in accordance with an embodiment of the present invention;

FIG. 6B illustrates the installation of the other end of the secondary beam of FIG. 3D to the main beam of FIG. 2C in accordance with an embodiment of the present invention;

FIG. 6C illustrates rotation of the secondary beam of FIG. 3D under gravity according to an embodiment of the present invention;

fig. 7 illustrates a first grid constructed using wood secondary beams according to an embodiment of the present invention;

FIG. 8A illustrates a perspective view of a standard grid and cantilever grid having overhangs relative to walls according to an embodiment of the invention;

FIG. 8B illustrates a side view of a standard grid and cantilever grid having overhangs relative to the wall in accordance with an embodiment of the present invention;

FIG. 9 illustrates another form having a plurality of standard grids and cantilever grids according to an embodiment of the present invention;

FIG. 10A illustrates a top view of the form of FIG. 9 with horizontal braces in accordance with an embodiment of the present invention;

FIG. 10B illustrates a different view of the form of FIG. 10 with horizontal braces in accordance with an embodiment of the present invention;

FIG. 11A shows an enlarged view of an embodiment of the present invention showing a quick-connect clamp 1100 securing a multi-stage activity head unit to a post;

FIG. 11B illustrates various views of an assembled quick-connect clamp according to an embodiment of the present invention;

FIG. 11C illustrates an exploded view of components of a quick-connect clamp according to an embodiment of the present invention;

FIG. 11D illustrates a different view of the coupling between another type of movable head unit and a strut using a quick-fix clamp according to an embodiment of the present invention; and

Fig. 11E to 11G illustrate steps of operating the quick-fixing jig to fix the movable head unit to the column according to the embodiment of the present invention.

Further, skilled artisans will appreciate that elements in the figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale. For example, the flow diagrams illustrate methods according to the most prominent steps involved to help improve understanding of various aspects of the invention. Furthermore, with respect to the construction of the device, one or more components of the device may have been represented by conventional symbols in the drawings, and the drawings may show only those specific details that are pertinent to understanding the embodiments of the present invention so as not to obscure the drawings with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein.

Detailed Description

For the purposes of promoting an understanding of the principles of the invention, reference will now be made to the embodiments illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated system, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The systems, methods, and examples provided herein are illustrative only and not intended to be limiting.

For example, the term "some" as used herein may be understood as "none" or "one" or "more than one" or "all. Thus, the terms "none", "one", "more than one but not all" or "all" will fall under the definition of "some". It will be appreciated by those skilled in the art that the terms and structures used herein are for describing, teaching and illustrating certain embodiments and specific features and elements thereof, and thus should not be construed as limiting, restricting or reducing the spirit and scope of the present invention in any way.

For example, any terms used herein, such as "comprising," "including," "having," "constituting," and similar grammatical variants, are not to be construed as specifying precise limitations or constraints, and certainly do not preclude the addition of one or more features or elements, unless otherwise indicated. Further, these terms are not intended to exclude the possibility of removing one or more of the listed features and elements unless otherwise indicated, for example, by using a limiting language including, but not limited to, "must include" or "need to include.

Whether a feature or element is limited to use only once, it may still be referred to as "one or more features" or "one or more elements" or "at least one feature" or "at least one element. Furthermore, the use of the term "one or more" or "at least one" feature or element does not exclude the absence of such feature or element unless otherwise specified by a limiting language including, but not limited to, "requiring one or more of the same.

Unless defined otherwise, all terms, particularly any technical and/or scientific terms, used herein may be considered to have the same meaning as commonly understood by one of ordinary skill in the art.

Reference is made herein to some "embodiments". It should be understood that the embodiments are examples of possible implementations of any feature and/or element of the invention. Some embodiments have been described in order to explain one or more potential ways in which particular features and/or elements of the proposed invention may meet unique, practical, and non-obvious requirements.

The use of phrases and/or terms including, but not limited to, "first embodiment," "another embodiment," "alternative embodiment," "an embodiment," "embodiments," "a plurality of embodiments," "some embodiments," "other embodiments," "additional embodiments," "further embodiments," "additional embodiments," or other variations thereof, does not necessarily refer to the same embodiment. Unless specified otherwise, one or more particular features and/or elements described in connection with one or more embodiments may be found in one embodiment, or may be found in more than one embodiment, or may be found in all embodiments, or may not be found in any embodiment. Although one or more features and/or elements may be described herein in the context of only a single embodiment, or more than one embodiment, or all of the embodiments, these features and/or elements may alternatively be provided separately or in any suitable combination or none at all. Conversely, any features and/or elements described in the context of separate embodiments may alternatively be implemented in the context of a single embodiment in combination.

Any specific and all details set forth herein are used in the context of some embodiments and thus should not be construed as limiting the claimed invention.

Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

Fig. 1A and 1B illustrate different views and details of a first template 100 and a multi-stage activity head unit 102 according to an embodiment of the invention. Specifically, fig. 1A shows a perspective view of the first template 100 in a normal scene with early striking, and fig. 1B shows a plan view of the first template 100 of fig. 1A. The first template 100 may include, but is not limited to, a plurality of primary beams 104 and secondary beams 106, a plurality of struts 118, and a plurality of multi-stage movable head units 102.

The first template 100 may include a plurality of struts or braces 118A, 118B, 118C, 118D, 118E, 118F (commonly referred to as 118) and a plurality of multi-stage movable head units 102, which may be configured to provide support to the primary and secondary beams 104, 106. The post 118 may be made of a material having the necessary strength to support the grid, the poured concrete, and the load of one or more operators. It will be appreciated that the multi-stage movable head unit 102 may also be configured to support the load of the grid, the cast concrete, and the load of one or more operators. The multi-stage movable head unit 102 may have different designs. Details of the different multi-stage activity head units 102 may be explained in connection with fig. 3A, 3C and 3G.

The first form 100 may be formed as a grid made of a plurality of primary beams 104 and secondary beams 106 as shown in fig. 1A and 1B. These beams may be denoted 104A, 104B and 104C and 106A to 106B to distinguish the various positions they are used in. Further, as shown in fig. 1A and 1B, the grid may include a first or standard grid 108 and a second or cantilever grid 110. The first or standard grid 108 may be used as a platform for building structures inside a building and may include a first cladding member 112, and the second or cantilever grid 110 may be used for building structures around or inside a building, including using it as a platform for concrete casting or any other purpose, such as a work platform for workers. The standard grid 108 may include a first cladding member 112. In one example, the cladding member 112 may be made of plywood. As best shown in fig. 1A, the main beam 104 may be supported on a multi-stage movable head unit 102, which in turn is secured to a post 118, and may be configured to support a plurality of secondary beams 106 thereon to form a grid.

Further, the cantilever grid 110 may also be formed by combining the primary beams 104 and the secondary beams 106, and may include a second cladding member 114. Further, the primary beams 104 and secondary beams 106 of the cantilever grid 110 are arranged such that the second cladding member 114 is flush with the first cladding member 112 and achieves a flat horizontal surface. The cantilever grid 110 may be so called because one end of each secondary beam 106A is attached to the side of the main beam 104B and the other end is not attached to the main beam 104A, thereby forming a cantilever grid. Instead, the secondary beam 106A rests on top of the primary beam 104A, resulting in the other end of the secondary beam 106A overhanging the primary beam 104A.

In one example, the primary and secondary beams 104, 106 are made as a single piece of metal formed by an extrusion process. Further, aluminum may be used to make the primary and secondary beams 104, 106. Specifically, a main beam 104 is disclosed that may be made from a single aluminum extrusion. This can also be made of two separate parts connected back-to-back. Moreover, the main beams may also be formed from steel or any other metal, polymer or composite material or wood beams by replacing the aluminum extrusion with any custom length as desired.

The main beams 104 may have various designs in accordance with the present invention. For example, the main beam 104 may have a profile with cavities along the sides and a single hook-shaped connecting member. Such an example is shown in fig. 2A.

Referring now to fig. 2A (a), each main beam 104 includes a pair of lips 104-1 to receive the connecting member 106-1 on the end of the secondary beam 106 as shown in view (B) of fig. 2A so that the connecting member 106-1 may rest on the lips 104-1 or on the multi-stage movable head unit 102. The main beam 104 may also have a connecting member 104-3 of different designs and configurations adapted to be coupled to the multi-stage activity head unit 102, as shown in fig. 2A (B). The main beam 104 may also include a top surface 104-2 having a cavity 104-4, and first and second sides each adjacent to the top surface 104-2 and each having a lip 104-1. The secondary beam 106 may be secured to the main beam 104 or the movable head unit 102 such that the secondary beam 106 may be separated from the main beam 104 or the multi-stage movable head unit 102 during a blow. The striking process may be understood as the process of removing the cladding member, primary beam 104 and secondary beam 106 after the concrete has cured to achieve the compressive strength required to carry its own weight.

While the main beam in fig. 2A has a short, thin profile and has a slot-shaped connecting member 104-3, the main beam 104 may have a double hook design. Such an exemplary main beam 104 is shown in fig. 2B.

Referring now to fig. 2B (a), each main beam 104 includes a pair of top downward lips 104-6 and a pair of bottom upward lips 104-1 that form cavities 104-4 on either side to receive self-rotating locking hooks 106-11 that are secured to the ends of secondary beams 106, as shown in fig. 2B (B). The self-rotating locking hooks 106-11 of the secondary beams 106 may rest on the lip 104-1 prior to locking into the cavity 104-4 or locking into the multi-stage movable head unit 102. The main beam 104 may also include a double wall hook 104-7 that latches to the movable head unit 102.

The main beam 104 may also include a top surface having a downward lip 104-6 on a first side and a second side, both adjacent the top surface and each also having a bottom upward lip 104-1. The main beam 104 also includes a latch cavity 104-4 formed between the bottom-up lip 104-1 and the top surface having the downward lip 104-6. The locking cavity 104-4 is configured to lock the self-rotating locking hook 106-11 and prevent the self-rotating locking hook 106-11 from being accidentally dislodged from the locking cavity 104-4 of the main beam 104. In addition, the main beams 104 may include bottom grooves 104-5 to accommodate bolts, T-bolts, or any other components. Thus, the main beams 104 may store fasteners, which do not require a separate arrangement to carry such fasteners.

Still another type of main beam 104 is explained with reference to fig. 2C. Further, each primary beam 104 may include a double-walled end hook 104-3, and each secondary beam 106 may also include a specially designed double-walled end hook 106-12, details of which will be provided later with reference to fig. 2C and 2D.

Referring now to fig. 2C (a), each main beam 104 includes a pair of top down lips 104-6 and a pair of bottom up lips 104-1 that form cavities 104-4 on either side to receive a specially designed double-walled end hook 106-12 secured to the end of the secondary beam 106 as shown in fig. 1 or another main beam 104 in fig. 1B. The specially designed double-walled end hook 106-12 of the secondary beam 106 may rest on the lip 104-1 before locking into the cavity 104-4 or into any attachment of the multi-stage activity head unit 102. The main beam 104 also includes a cavity 104-4 formed between the bottom-up lip 104-1 and the top surface having the downward lip 104-6. The cavity 104-4 is configured to lock the secondary beam 106 by means of its specially designed double-walled end hooks 106-12 that self-rotate the beam and prevent the beam from being accidentally dislodged from the cavity 104-4 of the primary beam 104. The secondary beam 106 may be installed manually. The secondary beam 106 may be secured to the main beam 104 or the multi-stage movable head unit 102 such that the secondary beam 106 may be separated from the main beam 104 or the multi-stage movable head unit 102 during a blow. The striking process may be understood as the process of removing the cladding member, primary beam 104 and secondary beam 106 after the concrete has cured to achieve the compressive strength required to carry its own weight.

Referring now to (B) in fig. 2C and fig. 2D, secondary beam 106 may be formed as a single piece extruded component made of aluminum. Secondary beam 106 includes a self-rotating hook 106-1 having a face 106-9. In one example, the face 106-9 of the end hook 106-1 of the secondary beam 106 locks with the upper surface of the cavity 104-4 of the primary beam 104. In addition, the secondary beam 106 has a hook 106-10 adjacent the rotational lock 106-1 and adapted to engage the lip 104-1 of the cavity 104-4 of the primary beam 104.

Further, secondary beam 106 includes a body, which may be an aluminum extrusion, having top flanges 106-2 on either side of a centrally located nailing insert 106-3 to receive cladding members 112 as shown in view 3-3 of FIG. 2D. The secondary beam 106 also includes a bottom recess 106-4 that allows for the securement of any additional accessories, such as T-bolts and the like. Secondary beam 106 also includes a slot 106-5 on which is mounted a polymer cap 106-6, as shown in fig. 1D. In addition, secondary beam 106 has a cavity 106-7 formed by lip 106-8. Cavity 106-7 has a similar structure to cavity 104-4 and is configured to attach cross trusses or horizontal trusses or any other element. Thus, the cavity 106-7 enables an operator to mount other components to the secondary beam 106 without the use of additional or specialized equipment or mounts.

As previously described, the primary beams 104 and the secondary beams 106 are connected to the multi-stage movable head unit 102 to form a grid. In other words, the multi-stage activity head unit 102 may serve as a set of joints to which the primary and secondary beams 104, 106 may be connected. The multi-stage movable head unit 102 may have different designs based on the type of primary and secondary beams 104, 106. An exemplary multi-stage activity head unit 102 is described with reference to fig. 3A-3K.

Fig. 3A illustrates a multi-stage activity head unit 102 coupled to the main beam of fig. 2A, in accordance with an embodiment of the present invention. The multi-stage activity head unit 102 may include a base plate 120 that may couple the multi-stage activity head unit 102 to a strut or brace 118. In one example, the base plate 120 may include a plurality of apertures 122 to receive fastening members that couple the multi-stage activity head unit 102 to the struts or braces 118. Another way to couple the multi-stage activity head unit 102 to the post 118 is through the use of a quick-fix clamp 1100, the details of which will be discussed later.

The multi-stage activity head unit 102 may also include a stem 124 attached to the base plate 120 such that the stem 124 is orthogonal to the base plate 120. The lever 124 may be configured to support other portions of the multi-stage movable head unit 102 thereon. In one example, the multi-stage activity head unit 102 may also include a fly plate 126 that may be attached to the length of the stem 124. For example, the flight plate 126 may be attached to a middle portion of the stem 124 such that the stem 124 protrudes from the flight plate 126. Fly plate 126 may slide along rod 124.

The fly plate 126 may have a rectangular or square hollow cross-section and may include a first wall 126-1, a second wall 126-2, a third wall (not visible), and a fourth wall (not visible). The flight plate 126 can include a pair of first attachment portions 128 on the first wall 126-1 and the third wall. The first attachment portion 128 includes a cutout portion of a predetermined shape to receive and secure thereon the connection member 106-1 (shown in fig. 2A) of the secondary beam 106 or the connection member 104-3 of the primary beam 104. As clearly shown, the first attachment portion 128 is formed on the periphery of the fly plate 126.

The flight plate 126 may also include a pair of flanges 130 that are attached to the second wall 126-2 and a fourth wall (not visible). The pair of flanges 130 may protrude from their respective walls. Further, each flange 130 may include a second attachment portion 128 and a third attachment portion 134 that are vertically spaced apart by a defined distance. In one example, the spacing between the two levels may be equal to the depth of secondary beam 106. The second attachment portion 128 and the third attachment portion 134 are also configured to receive and secure the connection member 104-3 at two different levels as required in a standard or cantilever grid. Moreover, the attachment is designed such that it will avoid tilting of the main beam 104 during erection. Further, the second attachment portion 128 and the third attachment portion 134 may also receive the connection member 106-1 of the secondary beam 106.

In one example, the first, second, and third attachment portions 128, 134 enable the multi-stage activity head unit 102 to have six more attachment points than four attachment points in currently known multi-stage activity head units, thereby enabling multi-stage activity head unit 102 for manufacturing first template 100 to have versatility. Specifically, the pair of first attachment portions 128 and the pair of second attachment portions 128 provide four attachment points at a first level or top level, while the pair of third attachment portions 134 provide two attachment points at a second level or bottom level that is different from the first level or top level. In one example, the first level and the second level may be vertically spaced apart by a defined distance, which may also be equal to the depth of the secondary beam 106.

Moreover, the second attachment portion 128 and the third attachment portion 134 enable the top of the cantilever grating 110 to be at the same height relative to the top of the standard grating 108. By coupling the main beam 104A to the third attachment portion of the multi-stage movable head unit 102, as shown in fig. 1A, and placing the secondary beam 106A on top of the main beam 104A, the same height of the cantilever grid 110 may be achieved. Further, the other end of secondary beam 106A, including connecting member 106-1, may be coupled to lip 104-1 of primary beam 104B. Thus, the multi-stage movable head unit 102 allows the second grid 110 to be built using the same primary beams 104 and secondary beams 106 without the need for special equipment that is otherwise required in currently known templates. Moreover, the multi-stage movable head unit 102 supporting the standard grid 108 of the cantilever grid 110 eliminates the need for additional multi-stage movable head units 102 or any movable head attachments and beams to construct the second grid 110.

While one of the foregoing embodiments shows the top tube 129 of the multi-stage movable head unit 102 as shown in fig. 3A, other designs are also contemplated. Exemplary embodiments of different activity heads are shown in the following embodiments.

Referring now to fig. 3B, multi-stage activity head unit 102 may include activity head adapter 136, which may be attached to top tube 129 at an end of rod 124 opposite the end of rod 124 attached to base plate 120. The movable head adapter 136 may be configured to be flush with the first cladding member 112. The movable head adapter 136 is configured such that the movable head adapter 136 is flush with the secondary beam adapter, or in other words, coplanar with the secondary beam adapter. This placement allows for a flat surface for the first cladding member 112 and thus for the uncured concrete.

Although the foregoing embodiments relate to single plate based attachments, the multi-stage movable head unit 102 may have a hook design. Such an exemplary design is shown in fig. 3C-3F.

Specifically, fig. 3C illustrates a multi-stage activity head unit having a hook attachment coupled to the main beam of fig. 2B, while fig. 3D illustrates the multi-stage activity head unit 102 of fig. 3C having an activity head adapter. Further, fig. 3E illustrates the installation of the main beam of fig. 2B and the multi-stage movable head unit of fig. 3C, and fig. 3F illustrates a front view of the enlarged portion AA, which illustrates the installation of the double-wall hook of the main beam of fig. 2B and the attachment portion of the multi-stage movable head unit of fig. 3C.

The multi-stage activity head unit 102 includes a stem 124 attached to the base plate 120 such that the stem 124 is orthogonal to the base plate 120. The lever 124 may be configured to support other portions of the multi-stage movable head unit 102 thereon. In one example, the multi-stage activity head unit 102 may also include a flight deck tube 126 that may be attached to the length of the stem 124. The flight tube 126 can slide along the rod 124 up to the level of the stop plate 133 and cannot move further upward when the top plate 130 of the flight tube 126 hits the stop plate 133. Once hammered during the striking process, the wedge 121 is above the carrier plate 125 in the locked position while it slides down to the base plate 120.

The flight tube 126 may have a rectangular or square hollow cross-section and may include a first wall 126-1, a second wall 126-2, a third wall (not visible), and a fourth wall (not visible). Fly plate tube 126 may include a top plate 130, which may include a pair of first hooks 128 on sides of first wall 126-1 and a third wall (not visible) parallel to top tube 129. The first hook 128 includes a cutout portion of a predetermined shape to receive and secure thereon the self-rotating locking hook 106-11 (shown in fig. 2B) of the secondary beam 106.

The fly-plate tube 126 may include a second pair of hooks 128 on the top plate 130 in a direction perpendicular to the top tube 129 on sides of the second wall 126-2 and a fourth wall (not visible), and a third pair of hooks 134 on the bottom plate 135 of the fly-plate tube 126 vertically spaced from the first pair of hooks 128 and the second pair of hooks 128. In one example, the spacing between the two levels may be equal to the depth of secondary beam 106. The second pair of hooks 128 and the third pair of hooks 134 are also configured to receive and secure the double wall hooks 104-7 at two different levels as required in a standard or cantilever grid. Moreover, the hooks are designed such that they will avoid tilting of the main beams 104 during erection. During assembly, the second pair of hooks 128 and the third pair of hooks 134 are coupled to the double wall hooks 104-7.

In one example, the first, second, and third hooks 128, 134 enable the multi-stage activity head unit 102 to have six more attachment points than four in currently known activity head units, thereby enabling multi-stage activity head unit 102 for manufacturing first template 100 to have versatility. Specifically, the pair of first hooks 128 and the pair of second hooks 128 provide four attachment points at a first level or top level, while the pair of third attachment portions 134 provide two attachment points at a second level or bottom level that is different from the first level or top level. In one example, the first level and the second level may be vertically spaced from each other, which may be equal to the depth of the secondary beam 106. Although the present illustration shows the number of third hooks 134 as two, additional numbers/pairs of fifth attachment points and sixth attachments or hooks may be used that are formed at a third level such that the third level is above the second level but below the first level. As shown in (B) of fig. 3C, the additional attachment increases the total number of couplings to eight or even twelve by adding another layer of hooks in the middle. Additional or fewer numbers of hooks in a hierarchy or any direction are contemplated without departing from the scope of the present invention.

Moreover, the second and third hooks 128, 134 enable the top of the second or cantilevered grid 110 to be at the same height relative to the top of the first or standard grid 108. The same height of the second or cantilever grid 110 may be achieved by coupling the main beam 104A to a third hook of the multi-stage movable head unit 102, as shown in fig. 1A, and placing the secondary beam 106A on top of the main beam 104A. Further, the other end of secondary beam 106A, including self-rotating locking hook 106-11, may be coupled to lip 104-1 of primary beam 104B. Thus, the multi-stage activity head unit 102 allows the second or cantilever grid 110 to be built using the same primary beams 104 and secondary beams 106 without the use of special components that are otherwise required in currently known templates. Moreover, the multi-stage movable head unit 102 of the first or standard grid 108 supporting the second or cantilever grid 110 eliminates the need for additional multi-stage movable head units 102 or any movable head attachments and beams to construct the second or cantilever grid 110. In addition, the fill area 703 may be formed by the same secondary beam 106 with walls 705, and the walls 705 form the standard grid 108 and cantilever grid 110, as shown in fig. 8A.

In one example, top plate 130 may include a plurality of holes 131 that may be used to attach additional components, such as horizontal braces 701 as shown in fig. 10A. Horizontal struts 701 are employed between struts 118 to make the system more stable.

Details of the double-wall hook 104-7 and the self-rotating locking hook 106-11, and the first, second, and third hooks 128, 134 will now be described with reference to fig. 3E and 3F. The presently illustrated embodiment of the latching of the double wall hooks 104-7 and the first hooks 128, as well as the structural and functional details, are applicable to the second hooks 128 and the third hooks 134.

Referring now to fig. 3F, the double-walled hook 104-7 may include a pair of horns 702 that may have a gap therebetween and may be adapted to receive the mounting hook 128. In one example, the horn 702 is designed such that the bottom of the horn 702 has a larger gap G1 and the top of the horn 702 has a smaller gap G2. The larger gap G1 enables easy insertion of the hook 128, while the smaller gap G2 limits lateral play between the hook 128 and the double-walled hook 104-7. Further, each corner 702 is wider at the top and narrower at the bottom. Further, the profile of each corner 702 is configured to form a tapered surface between the larger gap G1 and the smaller gap G2 that guides the hooks 128 through the valleys formed between the tapered surfaces.

Referring now to fig. 3E, each corner 702 may include a leg 704 that may extend from the top. Further, each leg 704 may be configured to rest on the top plate 130 when latched to the hook 128. Further, the double wall hooks 104-7 may be attached to the main beam 104 using fasteners. To latch the double-walled hook 104-7 to the hook 128, the main beam 104 is tilted relative to the movable head unit 102 such that the bottom of the double-walled hook 104-2 may be inserted around the hook 128 as shown in fig. 1E (a). When double-walled hook 104-7 is inserted around hook 128, the tapered surface from larger gap G1 guides hook 128 therefrom. Once inserted, the legs 704 contact the top plate 130. Thereafter, the main beam 104 may be tilted such that the main beam 104 is oriented orthogonal to the movable head unit 102, as shown in fig. 3E (B). The main beam 104 is oriented such that the legs 704 rest entirely on the top plate 130. A similar process is repeated for the other end of the main beam 104 and the other movable head unit 102.

Although the foregoing embodiment shows a solid hook design that receives the double-wall hooks 104-7 of the main beam 104, the hooks may have a double-wall hook design that may latch with the double-wall hooks of the main beam shown in fig. 2C. Such exemplary designs and manners will be explained with respect to fig. 3G through 3K.

Specifically, fig. 3G illustrates an assembled and exploded view of another multi-stage activity head unit 102 having a double-walled hook-shaped attachment that is coupled to the main beam 104 of fig. 2C, while fig. 3H illustrates the multi-stage activity head unit 102 of fig. 3G with an activity head adapter. Further, fig. 3I illustrates the multi-stage activity head unit 102 of fig. 3G with up to eight attachments, and fig. 3J illustrates a side view of the multi-stage activity head unit 102 of fig. 3G and the main beam in fig. 2C. Further, fig. 3K illustrates a side view of the multi-stage activity head unit 102 of fig. 3G and the main beam 104 of fig. 2C.

The multi-stage activity head unit 102 may include a base plate 120 that may couple the multi-stage activity head unit 102 to a strut or brace 118. In one example, the base plate 120 may include a plurality of apertures 122 to receive fastening members that couple the multi-stage activity head unit 102 to the struts or braces 118.

The multi-stage activity head unit 102 may also include a stem 124 attached to the base plate 120 such that the stem 124 is orthogonal to the base plate 120. The rod 124 is a hollow tube having a rectangular cross section, and may be configured to support other portions of the multi-stage movable head unit 102 thereon. The lever 124 has a stop plate 133 that is removably secured to the lever 124. The lever 124 has a slot 143 that receives the stop plate 133. In one example, the multi-stage activity head unit 102 may also include a fly-plate tube 126 that may slide over the length of the rod 124. The flight tube 126 can slide along the rod 124 up to the level of the stop plate 133 and cannot move further upward when the stop mechanism of the flight tube 126 hits the stop plate 133. In the locked position, the wedge 121 is positioned over the carrier plate 125 to hold the fly plate 126 in place. When hammered during the striking process, it slides down to the base plate 120, releasing the flyer and lowering it. The wedge has a directional nose 151 to indicate the direction of hammering for loosening. 121. 124 and 126 are interlocked with the removable top plate 129 by a bolting arrangement to prevent post-plating welding of the assembly.

The fly-plate tube 126 may have a rectangular or square hollow cross-section and may include a first top portion that serves as a stabilizing tube 126-1 for the grid and a second bottom portion 126-2 that creates the level differences required for the multi-stage activity head unit 102. The flight tube 126 can include a top plate 130, which can include hooks 128 in four directions at a first level. Each hook 128 includes a cut-out portion of a predetermined shape to receive and secure either the primary beam end hook 104-8 or the secondary beam connecting member 106-1 (shown in fig. 2C). In one example, a method of locking the wedge 121 and fly plate in the movable head bar along with the stop plate to ensure the position of the fly plate is described. On the vertical rod 124, the wedge 121 is inserted with its longer side parallel to the longer side of the rod 124 for placement on the load plate 125. The wedge is provided with a nose 151 indicating the loosening direction. Above this, the fly plate is assembled with the extension 130A in the same direction as the nose 151 of the wedge 121 to ensure that the beam hooked in this position does not accidentally move out of the wedge 121. After this assembly, the stop plate 133 is inserted into the slot 143 of the vertical rod 124, which holds the top plate 130 of the fly plate in the desired position. Thereafter, to lock the entire assembly, the movable head top member 129 is assembled. As shown in fig. 3G, the movable head top member 129 has an extension plate 137. The extension plate 137 also has a cut-out gap 141 at one end thereof. The notch 141 is inserted into the groove 144 of the stopper plate 133 to fix the stopper plate 133 in place. The movable head top member 129 is secured to the vertical rod 124 by using fasteners 139 through holes 138 of the extension plate 127 and holes 146 of the rod 124.

The flight tube 126 can include another set of hooks 134 on the floor 135 of the flight tube 126 at a second level such that the first level is different than the first level. The bottom plate 135 will be at a different level relative to the top plate 130 of the fly plate tube to facilitate a hooking configuration at multiple levels. In one example, the spacing between the two levels may be equal to the depth of secondary beam 106. The hooks 128 and 134 at all levels are also configured to receive and secure the double wall end hooks 104-8 of the main beam 104 at two different levels as required in a standard or cantilever grid. Moreover, the hooks are designed such that they will avoid tilting of the main beams 104 during erection. Further, hooks 128 and 134 are configured to also receive and secure rotational lock 106-1 of secondary beam 106.

Further, hooks 128 and 134 include lips 145 on their tips that prevent accidental removal of primary beam 104 and secondary beam 106 during erection. The lip 145 is provided with tapered ends to facilitate entry of the double wall end hooks 104-8 of the primary and secondary beams 104, 106. Moreover, the sides of the hooks 128, 134 serve as stabilizing surfaces that prevent the primary and secondary beams 104, 106 from tilting once they are coupled to the movable head unit 102.

In one example, hooks 128 and 134 enable multi-stage activity head unit 102 to have six more attachment points than four in currently known activity head units, thereby enabling multi-stage activity head unit 102 for manufacturing first template 100 to have versatility. In particular, the set of hooks 128 provides four points of attachment at a first level or top level, while the pair of hooks 134 provides two points of attachment at a second level or bottom level that is different from the first level or top level. In one example, the first level and the second level may be separated by a distance equal to the depth of the secondary beam 106. Although the present illustration shows the number of hooks 134 as two, an additional number of hooks 134 may be used, increasing the total number of couplings to eight or even twelve by adding another layer of hooks in the middle, as shown in fig. 3I. Additional or fewer numbers of hooks are contemplated without departing from the scope of the invention.

Moreover, the pair of hooks 128 and 134 enable the top of the second or cantilevered grid 110 to be at the same height relative to the top of the first or standard grid 108. The same height of the second or cantilever grid 110 may be achieved by coupling the main beam 104A to the hooks 134 of the multi-stage movable head unit 102, as shown in fig. 1A, and placing the secondary beam 106A on top of the main beam 104A. Further, the other end of secondary beam 106A, including specially designed self-rotating hooks 106-1, may be coupled to lip 104-1 of primary beam 104B. Thus, the multi-stage activity head unit 102 allows the second or cantilever grid 110 to be built using the same primary beams 104 and secondary beams 106 without the use of special components that are otherwise required in currently known templates. Moreover, the multi-stage movable head unit 102 of the first or standard grid 108 supporting the second or cantilever grid 110 eliminates the need for additional movable head units 102 or any movable head attachments and beams to construct the second or cantilever grid 110. Additionally, the hooks 134 may be used to form a fill area with the same secondary beam 106 that forms the standard grid 108 and the cantilever grid 110.

In one example, the hooks 128 may include a plurality of holes 131 that may be used to attach additional accessories, such as wind clips, chains, and horizontal braces 701, as shown in fig. 10A, to impart additional stability to the grille. Moreover, these holes 131 may be used to attach conventional anchoring mechanisms to the floor below.

Fig. 3J and 3K illustrate a stabilizing mechanism implemented using primary and secondary beams when coupled to a movable head. The primary beam has a double-walled end hook 104-8 and the secondary beam 106 has a double-walled end hook 106-12 that is also double-walled. The movable head hooks 128 and 134 are designed to fit into cavities formed in the double walls of these end hooks 104-3 or 106-1. Specifically, FIG. 3J shows a side view of the movable head unit 102 showing the double-walled end hook 104-8 hooked to the hook 128, while FIG. 3K shows a top view of the double-walled end hook 104-8 mounted on the hook 128. When assembled with the primary/secondary beam end hooks, the movable head unit 102 creates two interfaces that give stability to the grid against wobble and tilting. The presently illustrated embodiment of the hooking of the double-walled end hook 104-8 and the hook 128, and the structural and functional details, are also applicable to the hook 134.

The double-walled end hook 104-8 may include a pair of side walls 802 that may have a cavity C therebetween (shown in fig. 3K) and may be adapted to receive the hook 128. The double-walled end hook 104-3 includes a front wall 810 extending at either end of the side wall 802. In one example, the sidewall 802 is designed such that the inner surface 804 of the sidewall 802 fits tightly into the surface of the outer wall 806 of the hook 128, creating an interference region 812. Moreover, the outer end surface 808 of the front wall 810 may abut the outer surface of the top, i.e., the stability tube 126-1 of the fly-head tube 126, creating another interference region 814. As shown in fig. 3J and 3K, the portion of the outer wall 806 of the hook 128 that mates with the portion of the side wall 802 of the double-walled end hook 104-3 forms a first contact area 812 that provides stability to prevent the main beam 104 from tilting. On the other hand, as shown in fig. 3K, the outer surface 808 of the front wall 810 of the double-walled end hook 104-8 abuts the outer surface portion of the top (i.e., the stabilizing tube 126-1 of the fly-head tube 126) and forms a second contact area 814. The second contact area 814 provides stability to prevent jolt of the main beam 104. Once this sequence for creating a pair of opposing main beams 104 is completed, a secondary beam 106 is coupled between the pair of main beams 104 to complete the grid as shown in form 100. The first contact region 812 and the second contact region 814 ensure a stable main beam when coupled with the secondary beam 106 connected as a rigid grid, thereby imparting self-stability to the form 100.

According to the present invention, the form may be designed such that the form may be struck earlier without the plywood jam, or in other words, the first cladding member 112 and the second cladding member 114 are prevented from being jammed. This arrangement enables removal of the secondary beam 106 and the secondary beam adapter 116 to transfer the full load of the concrete slab on the post 118. Thus, the secondary beam adapters 116 enable an operator to disassemble some of the primary beams 104, secondary beams 106, and first cladding members 112 when the concrete has been partially cured, thereby alleviating the need to keep the first or standard grid 108 assembled. This removal of the first or standard grid 108 allows the same set of components to be used multiple times to build additional structures.

Fig. 4A and 4B illustrate a second form 200 as an extension of the first form 100, wherein plywood jam is avoided by using two additional adapters in addition to the existing components used in the first form 100. When the arrangement is used as in the first form 100, the plywood sheathing 112 that will pass over the movable head 102 will be trapped between the concrete and the movable head top plate. One way to avoid this situation where the plywood 112 passes over the movable head 102 is to avoid the plywood passing over the secondary beam 106 and the movable head 102. To this end, the second template 200 may include a secondary beam adapter 116 that may be coupled to the secondary beam 106C at a movable head position and a movable head adapter 136 above the movable head 102 adjacent to the secondary beam adapter 116. The secondary beam adapter 116, together with the movable head adapter 136, helps to avoid the plywood from getting stuck during the early shots of the second template 200 and allows the post 118 with the movable head 102 and movable head adapter 136 to remain in place after the form is removed.

Details of the secondary beam adapter 116 are explained with reference to fig. 4C. Reference is now made to fig. 4C, which illustrates a cross-section taken along line 3-3 in fig. 4A, in accordance with an embodiment of the present invention. The secondary beam adapter 116 may be made of a material suitable for carrying the load of the first cladding member 112 and the poured concrete. As shown in detail in section 3-3 and secondary beam adaptor 116, secondary beam adaptor 116 may have a hollow cuboid shaped body with a rectangular cross section at the top and may include a pair of flanges 402-1 and 402-2 on either side 404 of secondary beam adaptor 116. The flanges 402-1, 402-2 are adapted to receive the bottom surface 112-1 of the first cladding member 112. The secondary beam adaptor 116 may include a vertical portion 408 defining a thickness thereof and extending above the flanges 402-1, 402-2, the height of the flanges being defined to be equal to the thickness of the cladding member. The thickness 408 of the secondary beam adaptor 116 may be varied to suit any thickness of the first cladding member 112, which gives the operator flexibility to use different thicknesses of the first cladding member 112 available to the operator. Moreover, the movable head adapter 136 (shown in fig. 3D) is also coplanar with the top surface 406 of the secondary beam adapter 116 and the plywood cladding 112. The three in combination with the movable head adapter 136, plywood cladding 112 and secondary beam adapter 116 help achieve a continuous flat surface on top.

In one example, the flanges 402-1, 402-2 are configured to allow the first cladding member 112 to be mounted on either side of the secondary beam 106, thereby preventing plywood from getting stuck over the movable head. This arrangement enables the glue board 112 to be removed without any jamming along with the secondary beam 106 and the secondary beam adapter 116 during early stripping. During demolding, the movable head adapter 136 remains on top of the movable head and remains stuck to the concrete, while all other components can be removed.

In accordance with the present invention, details of the activity head adapter 136 are explained in FIG. 3H. As shown in fig. 3H, the movable head unit 102 may be fitted with an additional adapter 136 on the top member 129. Referring now to fig. 3H, multi-stage activity head unit 102 may have activity head adapter 136 attached to pole 124 above top member 129. The top surface of the movable head adapter 136 may be configured to be flush with the top of the first cladding member 112 and the top surface 406 of the secondary beam adapter 116. This placement allows for a flat surface for uncured concrete.

According to the present invention, the multi-stage movable head unit 102 with the top member 129 may be used in a normal scenario as shown in fig. 1A, wherein early striking with plywood jam is allowed. However, the multi-stage activity head unit 102 with activity head adapter 136 may be used in an early strike scenario without plywood jam. During the form removal, when the concrete achieves the strength required to support its own weight, the primary beams 104, secondary beams 106, and cladding members 112, 114 may be removed while the support posts 118, movable head 102, and movable head adapter 136 remain in place.

Fig. 5A illustrates a third form 300 as an extension of the first form 100, wherein plywood jam is avoided by using additional closed beams in addition to the existing components used in the first form 100. When the arrangement is used as in the first form 100, the plywood sheathing 112 that will pass over the moving head 102 will be trapped between the concrete and the moving head top member 129. A second way to avoid this situation where the plywood 112 passes over the movable head 102 is to create a gap in the joint between two plywood panels from above the main beam equal to the size of the movable head top member 129. To this end, the third form 300 may include a closed beam 301 that may be placed in a plywood joint above the main beam 104. The closure beam will pass over the movable head top member 129. During an early strike of the third form 300, the closure beam 301 will be trapped between the concrete and the movable head top member 129 and allow the post 118 with the movable head 102 and closure beam 301 to remain in place after form removal, thus avoiding plywood sticking.

Details of the closing beam 301 are explained with reference to fig. 5B. According to the present invention, the closed beam 301 enables early striking without the sheathing members 112, 114 being caught by the primary and secondary beams 104, 106. Fig. 3B illustrates a section taken along line 4-4 in fig. 3A for illustrating the closure beam 301. The closure beam 301 may have a rectangular cross-section and flanges 502-1 and 502-2 on either side 504 of the closure beam 301. Further, the closure beam 301 may be mounted within a groove 404-3 formed between adjacent cladding members 112. In addition, the depth of the side 504 of the closed beam 301 may be equal to or less than the thickness of the first cladding member 112. Moreover, the flanges 502-1, 502-2 may include bottom surfaces 502-3, 502-4, respectively, and are adapted to receive the top surface 112-2 of the first cladding member 112 to prevent any gap between the first cladding member 112 and the main beam 104 when uncured concrete is poured. Further, the closure beam 301 spans the movable head top member 129, preventing the cover member 112 from passing over the movable head, thus avoiding jamming. Moreover, the primary beams 104, the first cladding members 112, and the secondary beams 106 may be removed, thereby causing the load of the partially cured concrete to be transferred to the struts 118 (shown in fig. 5A).

The invention also relates to a method of constructing a formwork. The order in which the method steps are described below is not intended to be construed as a limitation, and any number of the described method steps may be combined in any suitable order to perform the method or an alternative method. In addition, various steps may be deleted from the method without departing from the spirit and scope of the subject matter described herein. The following method is explained with respect to the first template 100 shown in fig. 1A and 2A, and the same method may be applied to construct the second template 200 and the third template 300.

The method may begin with the step of coupling the multi-stage activity head unit 102 to the support post 118. Once the multi-stage activity head unit 102 is coupled to the support column 118, the method may proceed to the step of erecting the support column 118. Referring now to FIG. 1A, a set of four struts 118A-118D are erected and stabilized using an erection aid, such as a support frame forming a square or rectangular pattern as shown in FIG. 1A.

The method may then proceed to the step of coupling the main beam 104C to the first and second struts 118A, 118B. In one example, a double-walled end hook 104-8 at one end of the main beam 104C is coupled to a hook 128 of the multi-stage activity head unit 102 on the first leg 118A, and the other end may have another double-walled end hook that may be lifted by the erection aid and may be coupled to a hook 128 of the multi-stage activity head unit 102 on the second leg 118B. Once the main beam 104C is supported on the first and second braces 118A, 118B, the main beam 104B may be coupled and supported to the third and fourth braces 118C, 118D in the same manner as the main beam 104C is supported by the first and second braces 118A, 118B.

The method may now proceed to the step of mounting secondary beam 106C on the movable head. To mount the secondary beam 106C, one end of the secondary beam 106C having one double-walled end hook 106-12 may be coupled to the hook 128 of the multi-stage movable head unit 102 on the second leg 118B. Once coupled, the other end may be lifted using the erection aid to couple the double-walled end hook 106-12 on the other end to the hook 128 of the multi-stage activity head unit 102 on the fourth post 118D.

The above steps are described in detail in conjunction with fig. 6A to 6B and fig. 2C and 2D. Fig. 6A illustrates a first step of mounting the secondary beam 106 on the cavity 104-4 of the primary beam 104B, wherein the secondary beam 106 may be oriented flat with a depth parallel to the length of the primary beam 104B. As shown in fig. 6A, a double-walled end hook 106-12 may be hooked into the latch cavity 104-4 (see fig. 1B) such that the hook 106-10 is locked into the bottom lip 104-1 of the cavity 104-4. The concept of orienting the beam flat is safer than the traditional way of orienting the beam upright into the cavity, which has the risk of falling. In the event that the beam is left alone without support by accident, the shape of the hooks 106-10 gives the beam a free vertical hanging-down configuration without any opportunity to disengage from the cavity, even without the use of any special stop mechanism as is required in other conventional approaches.

Once the hooks 106-1 at one end are hooked in place, the secondary beam 106 may be swung upward, as shown in fig. 6B, so that the hooks 106-1 at the other end may then be placed into the cavities 104-4 of the opposing primary beams 104, thereby making the secondary beam 106 horizontal. As shown in fig. 6C, the beam placed in the flat orientation automatically swings down to the upright position due to its own weight due to the specific positioning of the center of gravity created by the double-walled end hook 106-12.

Once the secondary beam 106 assumes a vertical orientation, the specially designed end hooks 106-1 on both ends of the secondary beam 106 are locked in the latching cavities 104-4 such that movement of the end hooks 106-1 in the horizontal as well as vertical directions is limited with minimal play by the top downward lip 104-1 of the locking cavities 104-4, as shown in fig. 6C. This prevents accidental removal of the secondary beam 106 relative to the primary beam 104. The same specially designed end hooks 106-1 may be used to mount secondary beam 106C directly into fly plate hooks 128 or 134 of the multi-stage activity head in an upright position similar to primary beam 104. There are a plurality of slots 106-5 surrounded by a polymer cap 106-6 having protrusions that allow press fitting to the web of secondary beam 106. Furthermore, the slot provides space for holding the secondary beam during handling and serves as a hooking point for the erection aid. Cap 106-6 acts as a handle that avoids sharp edges of the slot and prevents any foreign particles from entering the beam through the slot.

As shown in fig. 7, the first form 100 also allows for the use of standard wood form beams or joists 707 in combination with specially designed end hooks 106-1 to replace the extruded aluminum portion of the secondary beam 106.

Further, as shown in fig. 8A and 8B, the first template 100 also allows the use of a cantilever grid concept 703 adjacent to the wall location 705 to form a filling arrangement by passing the main beams 104 held at the lower hooks of the multi-stage activity head unit 102 using the same secondary beams 106. On the other hand, as shown in fig. 8C, the first template 100 may also be formed to realize a non-standard size grid without using additional components. Such a grid may be achieved by varying the overlap of the secondary beams 106 on the primary beams 104. For example, the secondary beam 106 may have an overhang O1 to achieve a predetermined length of the first template 100.

Alternatively, the method may proceed to the step of mounting secondary beam 106B to primary beams 104B and 104C using an erection aid. In one example, one double-walled end hook 106-12 of secondary beam 106B is coupled to lip 104-1 of primary beam 104C and the other end of secondary beam 106B is coupled to lip 104-1 of primary beam 104B. Further, additional secondary beams 106B may be coupled to the primary beams 104B and 104C with a predetermined spacing therebetween. The predetermined spacing between the second beams 106B and the predetermined distances between the first strut 118A and the second and third struts 118B, 118C may be in accordance with a template table or a template chart.

Further, to create the second or cantilever grid 110, the method may include the step of connecting the main beam 104A to the lower hooks 134 of the multi-stage movable head unit 102 on the fifth and sixth struts 118E, 118F. Thereafter, one end of the secondary beam 106A may be placed on the top surface of the primary beam 104A, and the other end of the secondary beam 106A may be coupled to the lip 104-1 on the second side of the primary beam 104B. Thereafter, a second cladding member 114 may be placed over secondary beam 106A to form a second grid.

The first cladding member 112 may be placed to create a first grid when the secondary beam 106B is installed. The method may be repeated for additional gratings in any direction.

In case the template is to be built to enable early striking without jamming, the method may comprise an additional step. The method for erecting the form 200 may include the steps of: secondary beam adapter 116 is mounted on secondary beam 106C such that a top surface 506 of secondary beam adapter 116 is coplanar with movable head adapter 136, as shown in fig. 2A. Thereafter, the first cladding member 112 may be placed over the flanges 502-1 and 502-2, as shown in FIG. 4C.

In another aspect, the method for erecting the form 300 may further comprise the additional steps of: the closure beam 301 is mounted in the recess 404-3 as shown in fig. 5A and 5B such that the closure beam 301 rests on the top member 129 of the movable head 102 as shown in fig. 5A and 5B and above the first cladding member 112 that has been placed such that the flanges 602-1, 602-2 are located on either side of the cladding member.

According to the present invention, the multi-stage movable head unit 102 with its corresponding hooks enables the connection of different components to achieve a standard grill 108 and a cantilever grill 110, respectively, without requiring any additional components, which is not possible in currently available conventional movable head units. Further, increasing multiple uses of the same equipment through secondary beam adapter 116 and closure beam 301 also reduces the time period of construction. In one instance, the secondary beam adapter 116 and the closure beam 301 may enable the standard grid to be disassembled after the general time of days of casting uncured concrete has elapsed rather than 28 days without seizing the cladding members 112, 114.

The stencil grid systems 100, 200, and 300 may also be disassembled or demolded. The method of disassembling the stencil grid systems 100, 200, and 300 is explained in the following paragraphs.

Referring now to fig. 1A and 3C, the wedge 121 of the movable head unit (102) is hammered, which lowers the flight deck tube 126 along with the main and secondary beams. Thereafter, the end of each of the plurality of secondary beams 106A of the cantilever grid 110 is separated from the primary beam 104A. Similarly, the other end of the secondary beam 106A is separated from the other primary beam 104B to detach the cantilever grid 110. Thereafter, an end of each of the plurality of secondary beams 106B of the standard grid 110 is separated from the main beam 104B and an end is separated from the main beam 104C to disassemble the standard grid 110.

Further, one end of the main beam 104A is separated from the third attachment portion 134 of the multi-stage movable head unit 102. The same process is repeated, separating one end of the main beam 104B from the first attachment portion 134 of the other multi-stage movable head unit 102. Further, one end of the main beam 104C is separated from the first attachment portion 134 of the other multi-stage movable head unit 102. Once the main beam 104C is detached, the end of the secondary beam 106B is separated from the second attachment portion of the multi-stage movable head unit 102.

In the above description, the multi-stage moving head unit 100 and the stay 118 are connected using fasteners. The use of fasteners is a time consuming and labor intensive task and results in an increase in the total time to construct the form 100. Furthermore, fasteners require special high precision tools, such as wrenches having a size corresponding to the size of the fastener. Thus, operators need to maintain an inventory of fasteners as well as tools. This problem can be solved by using a quick-fix clamp.

An exemplary embodiment of a quick-connect clamp 1100 is shown in fig. 11A-11G. Specifically, fig. 11A shows an enlarged view illustrating a quick-setting jig 1100 that fixes the multi-stage movable head unit 102 to the stay 118. Further, fig. 11B shows various views of the quick-setting jig 1100 after assembly, while fig. 11C shows an exploded view of the components of the quick-setting jig 1100. Further, fig. 11D shows different views of the coupling between the movable head unit and the strut using the quick-setting jig 1100. Further, fig. 11E to 11G illustrate steps of operating the quick-fixing jig 1100 to fix the movable head unit 102 to the stay 118.

The quick-setting clamp 1100 may be a single piece unit or a pair of identical units. In either case, each unit of the quick-connect clamp 1100 has a two-piece component design, namely a quick-connect mechanism 1102 and a slider 1104. The quick-connect mechanism 1102 may be formed as a top and the slider 1104 as a bottom. The quick-connect mechanism 1102 may include a pair of shorting pins 1105 that connect the base plate 120 of the multi-stage movable head 102 to the post 118. The number of short pins 1105 on the quick-connect mechanism 1102 may depend on the number of holes in the movable head unit 102 and the post 118. When installed, the shorting pin 1105 prevents relative movement between the movable head unit 102 and the post 118. The quick-connect mechanism 1102 may also include a stud 1106 formed along a lower portion of the quick-connect mechanism 1102. The stud 1106 has a wider head and a thin shaft. During installation, the stud 1106 moves relative to the slider 1104. As shown in fig. 11C, the quick-connect mechanism 1102 may have an L-shaped profile such that the stub 1105 and the stud 1106 are mutually orthogonal.

In addition, the slider 1104 may include a wedge slot 1107 that receives the stud 1106. When both the multi-stage movable head unit 102 and the post 118 are temporarily locked by the shorting pin 1105, the stud 1106 slides within the wedge slot 1107 to change the tightness therebetween in accordance with the present invention. The wedge slot 1107 may have different portions, namely a first portion 1107A, a second portion 1107B, and a third portion 1107C. The first portion 1107A may be vertical and extend along a portion of the height of the slider 1104. The first portion 1107A is a portion where the stud 1106 can rest when the quick-setting jig 1100 is not installed. Further, the first portion 1107A has a top end and a bottom end. The tip is the end up to which the stud 1106 can travel and at which the quick-setting jig 1100 assumes its maximum height. On the other hand, the bottom end is the end that passes through the stud 1106 between the first portion 1107A and the second portion 1107B. The second portion 1107B has a decreasing slope between the first portion 1107A and the third portion 1107C. This inclination causes the overall height of the quick-setting clamp 1100 to change as the stud 1106 travels through the second portion 1107B. The change in height may result in tightening or loosening of the quick-setting clamp 1100. In the illustrated example, the width of the first and second portions 1107A, 1107B is less than the diameter of the head of the stud 1106 such that the stud does not move out of the wedge slot 1107.

A third portion 1107C is formed at one end of the slider 1104. The third portion 1107C is connected to the second portion 1107B and may have a width that is greater than the diameter of the stud 1106. The wider third portion 1107C allows the stud 1106 to be installed in the wedge 1107. The third portion 1107C also includes a limiter 1109 that is bolted to the third portion 1107C. The limiter 1109 is adapted to reduce the width of the third portion 1107C to prevent the stud 1106 from being removed from the third portion 1107C once the stud 1106 is installed. The slider 1104 may also include a head 1110 on either side of the wedge slot 1107. The head 1110 allows an operator to hammer the slider 1104 to tighten or loosen the quick-setting clamp 1100.

According to the present invention, the slider 1104 is operatively coupled to the quick-connect mechanism 1102 such that movement of the slider 1104 causes the quick-connect mechanism 1102 to tighten or loosen. Since tightening or loosening can be performed by simply sliding the slider 1104, mounting or dismounting the multistage movable head unit 102 on the stay 118 can be performed quickly, which is not possible in the case of attaching the base plate 120 to the stay 118 using fasteners such as bolts and nuts.

Referring now to fig. 11E, the movable head unit 102 may be placed on the support post 118 such that the aperture of the substrate 120 is aligned with the support post 118. Thereafter, the quick-fix clamp 1100 may be aligned such that the stub 1105 is aligned with the hole. As clearly shown, a pair of two quick-fix clamps 1100 are used. Once aligned, the short pin 1105 is inserted into the hole as shown in fig. 11F. Finally, the operator may hammer the head 1110, thereby sliding the stud 1106 in the second portion 1107B. The sliding of the stud 1106 reduces the height of the quick set clamp 1100, resulting in tightening of the quick set clamp 1100. The operator may continue to hammer the head 1110 until maximum tightness is reached and the stud 1106 stops sliding further. Once the stud 1106 stops sliding, the movable head unit 102 is secured to the post 118 as shown in fig. 11G.

The same process is reversed to separate the movable head unit 102 from the support column 118.

Although the present invention has been described using a particular language, no limitation is intended thereby. It will be apparent to those skilled in the art that various operational modifications can be made to the method in order to implement the inventive concepts taught herein. The figures and the preceding description give examples of embodiments. Those skilled in the art will appreciate that one or more of the elements may well be combined into a single functional element. Alternatively, some elements may be divided into a plurality of functional elements. Elements from one embodiment may be added to another embodiment.

Claims

1. A multi-stage activity head unit (102) for a formwork (100, 200, 300), the formwork (100, 200, 300) being used to form a standard grid (108) by coupling primary beams (104) and secondary beams (106) at the same level; and forming a cantilever grid (110) by coupling primary beams (104) at different levels with the secondary beams (106), the multi-stage movable head unit (102) comprising:

A substrate (120);

a rod (124) orthogonally attached to the base plate (120); and

A slidable flight plate (126) mounted on a portion of the rod (124), comprising:

A pair of first attachment portions (128) formed on a periphery of the fly plate (126) and adapted to receive one of the primary beam (104) and the secondary beam (106); and

A pair of second attachment portions (128) and a pair of third attachment portions (134) formed on the perimeter of the flight plate (126) and adapted to receive one of the primary beam (104) and the secondary beam (106),

Wherein the pair of first attachment portions (128) and the second attachment portion (128) are coplanar at a first level, and the third attachment portion (134) is positioned at a second level.

2. The multi-stage activity head unit (102) of claim 1, wherein the first stage is an upper stage, the second stage is a lower stage, and a height of the upper stage relative to the base plate (120) is greater than a height of the lower stage relative to the base plate (120).

3. The multi-stage activity head unit (102) of claim 1, comprising a top member (129) coupled to the stem (124).

4. The multi-stage activity head unit (102) of claim 2, comprising an activity head adapter (136) coupled to the top member (129).

5. The multi-stage activity head unit (102) of claim 1, wherein each of the first attachment portion (128), the second attachment portion (128), and the third attachment portion (134) is one of a hook and a slot.

6. The multi-stage activity head unit (102) of claim 4, comprising a pair of fifth attachment portions and a pair of sixth attachment portions attached to the flight deck tube (126) at a third stage, wherein the third stage is above the second stage and below the first stage.

7. The multi-stage activity head unit (102) of claim 1, wherein each of the first attachment portion (128), the second attachment portion (128), and the third attachment portion (134) is a double-walled hook.

8. The multi-stage activity head unit (102) of claim 6, wherein the double-walled hook includes a pair of outer walls (806), the pair of outer walls (806) adapted to fit in a cavity formed between a pair of side walls of the double-walled hook (104-8) of the main beam (104).

9. The multi-stage activity head unit (102) of claim 1, comprising a wedge (121) adapted to secure the flight plate tube (126) to the stem (124), wherein the wedge (121) comprises a nose (151) indicating a direction in which the flight plate (126) is released relative to the stem (124).

10. The multi-stage activity head unit (102) of claim 1, wherein the lever (124) comprises:

a stop plate (133) removably secured to the rod (124); and

-A slot (143) adapted to receive said stop plate (133).

11. The multi-stage activity head unit (102) of claim 1, wherein the fly-plate tube comprises:

A first top adapted to act as a stabilizing tube for the grid;

a second bottom adapted to separate the first level from the second level;

a top plate (130) attached between the first top and the second bottom of the flight tube (126) and defining the first level;

-a bottom plate (135) surrounding the fly-plate tube (126) at a distance from the top plate (130), defining the second level.

12. The multi-stage activity head unit (102) of claim 8, wherein each of the hooking points (128) has a hole (131) adapted to receive one of a horizontal stay (701), a wind clip, and a chain.

13. The multi-stage activity head unit (102) of claim 1, wherein the wedge (121), the rod (124), and the fly plate tube (126) are secured to a removable top member (129) using bolts to prevent post-plating welding of the multi-stage activity head unit (100).

14. A formwork grid system (100, 200, 300) comprising:

a plurality of struts (118);

A plurality of main beams (104);

a plurality of secondary beams (106); and

A plurality of multi-stage activity head units (102) mounted on the plurality of struts (118) and adapted to be coupled to at least one of the plurality of primary beams (104) and the plurality of secondary beams (106) to form a standard grid (108) and a cantilever grid (110), each multi-stage activity head unit (102) comprising:

A base plate (120) coupled to one (118) of the plurality of struts (118);

a rod (124) orthogonally attached to the base plate (120); and

A slidable flight plate (126) slidably mounted on a portion of the rod (124), comprising:

A pair of flanges (130) having a second attachment portion (128) and a pair of third attachment portions (134) formed on the perimeter of the flight plate (126) and adapted to receive one of the primary beam (104) and the secondary beam (106),

15. The template grid system (100, 200, 300) according to claim 14, comprising:

-the standard grid (108) having a first cladding member (112); and

The cantilever grid (110) having a second cladding member (114),

Wherein the first cladding member (112) and the second cladding member (114) are adapted to form a horizontal surface on the primary beam (104) and the secondary beam (106).

16. The template grid system (100, 200, 300) according to claim 14, wherein said standard grid (108) comprises:

-a first girder (104B) from the plurality of girders (104), coupled to the multi-stage movable head unit (102) at the first level;

-a second main beam (104C) from the plurality of secondary beams (106), coupled to another multi-stage movable head unit (102) at the first level;

An end hook of the secondary beam (106B) mounted in the cavity (104-4) of the primary beam (106C) and another end hook of the secondary beam mounted in the cavity (104-4) of the primary beam (106B).

17. The formwork grid system (100, 200, 300) of claim 14, wherein the cantilever grid (110) comprises:

-a main beam (104B) attached to the multi-stage movable head unit (102) at the first level;

-a further main beam (104A) attached to a further multi-stage movable head unit (102) at the lower level;

An end hook (106-1) of the secondary beam (106) mounted in the cavity (104-4) of the main beam (104-B) and the other end of the secondary beam (106) placed on top of the lower main beam (104-a),

Wherein the overhang of the secondary beam (106) defines the length of the cantilever grating (110) and the face (106-9) of the end hook (106-1) of the secondary beam (106) is locked with the upper surface of the cavity (104-4).

18. The template grid system (200) according to claim 14, comprising:

At least one secondary beam adapter (116) positioned on a top surface of one of the secondary beams (106) and adjacent to the movable head adapter (136), wherein the secondary beam adapter (116) comprises a first flange (502-1), a second flange (502-2), and a top surface (506),

Wherein the first flange (402-1) and the second flange (402-2) are adapted to receive a bottom surface (112-1) of the first cladding member (112).

19. The template grid system (300) according to claim 14, comprising:

At least one closing beam (301) positioned on top of one of the main beams (104),

Wherein the at least one closure beam (116) comprises at least one flange (502-1, 502-2), the at least one flange (502-1, 502-2) comprising a bottom surface (502-3, 502-4) adapted to rest on the top surface (112-2) of one of the first cladding member (112) and the second cladding member (114).

20. The formwork grid system (300) of claim 19, wherein the flanges (502-1, 502-2) on either side (504) of the closure beam (301) are adapted to receive the first cladding member (112) below the bottom surface (502-3, 502-4) of the flanges (502-1, 502-2), and wherein the first cladding member (112) is adapted to retain poured concrete thereon.

21. The form grid system (200) of claim 13, wherein a thickness of the secondary beam adapter (116) is consistent with a thickness of the first cladding member (112) and the second cladding member (114) such that different thicknesses of the first cladding member (112) and the second cladding member (114) can be selected.

22. The formwork grating system (300) of claim 13, wherein a thickness of the closed beam (301) is based on a thickness of the first cladding member (112) and the second cladding member (114).

23. The formwork grid system (100, 200, 300) of claim 13, wherein the main beam (104) comprises:

-a cavity (104-4) along a longitudinal side of the main beam (104) and adapted to receive an end hook (106-1) of the secondary beam (106);

-lips (104-1) on each longitudinal side of the main girder (104), the lips (104-1) defining boundaries of the cavity (104-4);

a pair of double-walled end hooks (104-8) on either end of the main beam (104).

24. The formwork grid system (100, 200, 300) of claim 23, wherein each of the double-walled hooks (104-7) comprises:

A pair of corner portions (702) spaced apart from each other to form a tapered gap therebetween to receive one of the first attachment portion (128), the second attachment portion (128), and the third attachment portion (134),

Wherein the width (G2) of the gap at the bottom of the pair of corners (702) is greater than the width (G1) of the gap at the top of the pair of corners (702).

25. The form grid system (100, 200, and 300) of claim 23, wherein each of the double-walled end hooks (104-8) comprises:

A pair of side walls (802) having inner surfaces (804) defining a cavity therebetween, the cavity adapted to receive a hook (128, 134) of the multi-stage activity head unit (102), wherein the inner surfaces (804) interact with an outer wall (806) of the hook (128) of the multi-stage activity head unit (102) to prevent tilting of the main beam (104) relative to the activity head (102); and

A front wall (808) extending from an end of the side wall (802) and abutting an outer surface of a stabilizing tube (126-1) of the multi-stage movable head unit (102) to prevent wobble of the main beam (104) relative to the multi-stage movable head unit (102).

26. The formwork grid system (100, 200, 300) of claim 13, wherein the secondary beam (106) comprises:

A body having a pair of top flanges (106-2) extending along longitudinal sides of the profile and adapted to receive one of the first cladding member (112) and the second cladding member (114);

A nailing insert (106-3) extending along the longitudinal sides of the profile and interposed between the pair of top flanges (106-2);

-a self-rotating lock (106-1) adapted to be inserted into the cavity (104-4) in a predetermined orientation, wherein the self-rotating lock (106-11, 106-12) rotates within the cavity (104-4) from the predetermined orientation to secure the self-rotating lock (106-11, 106-12) in the cavity (104-4);

A hook (106-10) adjacent to the rotational lock (106-1) and adapted to engage the lip (104-1) of the cavity (104-4) of the main beam (104); and

A plurality of slots (106-5) formed along the body of the secondary beam (106) with a predetermined gap to retain the body, wherein each slot (106-5) includes a polymer cap (106-6) having a protrusion.

27. A method for erecting a formwork grid system (100, 200, 300), comprising:

installing a plurality of multi-stage movable head units (102) on a plurality of struts, the plurality of multi-stage movable head units including a first multi-stage movable head unit, a second multi-stage movable head unit, and a third multi-stage movable head unit;

-coupling a main beam (104C) to a first attachment portion (128) of the first multi-stage activity head unit (102), -coupling a main beam (104B) to a first attachment portion (128) of the second multi-stage activity head unit (102), -coupling a main beam (104C) to a third attachment portion (134) of the multi-stage activity head unit (102); and

A plurality of secondary beams (106B) are coupled to the primary beam (104C) to form a standard grid (108), and a plurality of secondary beams (106A) are coupled to the primary beam (104C) to form a cantilever grid (110).

28. The method of claim 27, wherein forming the cantilever grating comprises:

-coupling the main beam (104B) to a first attachment portion (128) of a first pair of multi-stage movable head units (102), -coupling the main beam (104A) to a third attachment portion (134) of a second pair of multi-stage movable head units (102);

-coupling a plurality of secondary beams (106A) by inserting one end hook (106-1) of said secondary beams (106) into said cavity (104-4) of said primary beam (104B);

Mounting the cantilever end of the secondary beam (106A) on the top surface (104-2) of the primary beam (104A); and

A plurality of secondary beams (106) are coupled between the pair of multi-stage movable head units (102).

29. The method of claim 27, wherein forming the standard grid comprises:

-coupling the main beam (104B) to a first attachment portion (128) of a pair of multi-stage movable head units (102), -coupling the main beam (104C) to a first attachment portion (128) of a second pair of multi-stage movable head units (102); and

-Coupling a plurality of secondary beams (106B) between the pair of primary beams (104B and 104C); and

30. The method of claim 27, comprising:

A first cladding member (112) is placed on the plurality of secondary beams (106B) and a second cladding member (114) is placed on the plurality of secondary beams (106A), wherein the height of the first cladding member (112) is the same as the height of the second cladding member (114).

31. The method of claim 27, comprising:

-mounting a secondary beam adapter (116) on a top surface of the secondary beam (106C), the secondary beam adapter (116) comprising a first flange (402-1) and a second flange (402-2), wherein the first flange (402-1) and the second flange (402-2) are adapted to receive a bottom surface (112-1) of the first cladding member (112).

32. The method of claim 27, comprising:

-mounting a closing beam (301) on a top surface (104-3) of the main beam (104), the closing beam (301) comprising at least one flange (502-1, 502-2) comprising a bottom surface (502-3), wherein the bottom surface (502-4) receives a top surface (112-2) of the first cladding member (112).

33. A method of dismantling a formwork grid system (100, 200, 300) comprising a standard grid (108) and a cantilever grid (110) adapted to support cured concrete thereon, the method comprising:

hammering the wedge (121) of each movable head unit (102) to lower the fly plate tube (126) of each movable head unit (102) along with the plurality of main beams (104A, 104B, 104C) and the plurality of secondary beams (106A);

-separating one end of each of a plurality of secondary beams (106A) of the cantilever grid (110) from a primary beam (104A) and the other end from another primary beam (104B) to disassemble the cantilever grid (110);

-separating one end of each of a plurality of secondary beams (106B) of the standard grid (108) from the primary beam (104B) and the other end from the other primary beam (104C) to disassemble the standard grid (110);

-detaching one end of the main beam (104A) from a third attachment portion (134) of the multi-stage movable head unit (102);

-disconnecting one end of the main beam (104B) from a first attachment portion (134) of another multi-stage movable head unit (102); and

-Disconnecting one end of the main beam (104C) from a first attachment portion (134) of another multi-stage movable head unit (102);

-separating an end of one secondary beam (106B) of the plurality of secondary beams (106B) from the second attachment portion of the multi-stage movable head unit (102);

34. A quick-connect clamp (1100) for a formwork grid system (100, 200, 300) securing a multi-stage movable head unit (102) to a post (118), the quick-connect clamp (1100) comprising:

A quick-connect mechanism (1102) comprising a stud (1106) and a pair of short pins (1105) adapted to connect the base plate (120) of the multi-stage movable head unit (102) to the post (118); and

-A slider (1104) having a wedge slot (1107) adapted to receive the stud (1106), wherein the stud (1106) is adapted to slide within the wedge (1107) to vary the tightness between the base plate (120) and the post (118) of the multi-stage moving head unit (102).

35. The quick-connect clamp (1100) of claim 34, wherein the wedge slot (1107) comprises:

A first portion (1107A) having a top end and a bottom end extending along a portion of the height of the slider (1104);

a second portion (1107B) extending along a length of the slider (1104) from the bottom end of the first portion (1107A), wherein the second portion (1107B) slopes downward from the bottom end; and

A third portion (1107C) extending from the second end (1107B) and adapted to insert the stud (1106) into the wedge slot (1107).

36. The quick-connect clamp (1100) of claim 35, wherein the third portion (1107C) includes a limiter (1109) adapted to prevent removal of the stud from the wedge slot (1107).

37. The quick-connect clamp (1100) of claim 35, wherein the wedge slot (1107) has a width at the first portion (1107A) and the second portion (1107B) that is less than a diameter of a head (1111) of the stud (1106).

38. The quick-connect clamp (1100) of claim 35, wherein the width of the wedge slot (1107) at the third portion (1107C) is greater than the diameter of the head (1111) of the stud (1106).

39. The quick-connect clamp (1100) of claim 35, wherein the slider (1104) includes heads (1110) on either side of the slider (1104) that receive a hammer impact.

40. The quick-connect clamp (1100) of claim 35, wherein the stud (1106) includes a head (1111) and a shaft (1112), wherein the diameter of the shaft (1112) is smaller than the width of the wedge (1107) at the first portion (1107A), the second portion (1107B), and the third portion (1107C).

41. The quick-connect clamp (1100) of claim 40, wherein the hammering impact is received by the head (1110) when the multi-stage movable head unit (102) is connected to the post (118) by the short pin (1105), and wherein the hammering impact locks the quick-connect mechanism (1102) to the multi-stage movable head unit (102) and the post (118).