CN115176063A

CN115176063A - Roof template braced system

Info

Publication number: CN115176063A
Application number: CN202080067559.XA
Authority: CN
Inventors: 何塞·路易斯·乌比尼亚纳·费利克斯
Original assignee: Histermans Scaffold Technology Co ltd
Current assignee: Histermans Scaffold Technology Co ltd
Priority date: 2019-09-26
Filing date: 2020-09-25
Publication date: 2022-10-11
Anticipated expiration: 2040-09-25
Also published as: CA3154746A1; EP3798387B1; US20220372774A1; PL3798387T3; ES2978588T3; CN115176063B; WO2021058849A1; EP3798387A1; EP3798387C0; BR112022005681A2; AU2020356415A1

Abstract

The invention relates to a roof formwork support system, the object of the invention being to provide greater stability to the system while facilitating its assembly and disassembly, comprising truss supports, trusses anchored to the truss supports, column heads with supporting seats for the trusses, column heads with lap attachments for the trusses that can overlap and distance holders for the two truss supports.

Description

Roof template braced system

Background

There are different roof formwork support systems in the prior art in which the purpose of using elements is to provide stability to the system while facilitating assembly and disassembly thereof by an operator.

As regards the connection between the girder and the girder support, there are systems in which the ends of the girder have terminals for anchoring on top of the girder support, such as the systems shown in documents ES2266434T3 or ES2269006 A1. However, in the above-mentioned document, it is not possible to install the truss supports at a distance different from the length of the truss fixed beforehand, because these truss supports are configured to rest only on their terminals. In a system that makes it possible to achieve this, as shown in document FR2760482A1, it is complicated that the girder can be detached from the girder cradle without damaging the supporting formwork, since the girder is not designed to pivot relative to the anchoring points of the girder without increasing the height.

As regards the connection between the truss brace and the head of the stud, there are systems in which the ends of the truss brace have terminals to be anchored to the head by tilting the terminals from a level lower than the head. However, the above-mentioned connection method either makes it impossible to place the truss support above the head, as shown for example in document EP0751268 A2; either very expensive girders of different lengths have to be placed, such as the kind shown in document US2018334818, or the cost of the terminals added to the girder cradle is high, such as the terminals shown in document KR101012088B 1. Furthermore, safety systems are known such that the truss support is not accidentally released from the head, such as those shown in documents CN105926932A or GB 2065654A. However, these systems are complex to use and expensive to manufacture.

It is known to place truss braces overlapping the head of the stud, as shown in document KR 201203729U. However, in this type of system, placing the truss work is laborious, whether one truss work has to be placed or two truss works have to be placed one above the other.

As regards the stability of the system, there are elements that can fix the distance between the truss supports, such as the one shown in document US2018340342 A1. However, this document does not describe whether the arrangement of the elements can adjust its positioning by itself.

Thus, there remains a need for a system that is inexpensive to manufacture, meets robustness requirements when in use, and is capable of being quickly assembled and disassembled.

Disclosure of Invention

The support system for roof formwork of the present invention comprises a plurality of elements which bring novelty in its field of application, all of which are designed to provide greater stability to the support system, while facilitating its assembly and disassembly.

One element of the support system corresponds to a girder defined by a first profile having a flat lower surface, so that the girder can be supported on the upper surface of one or more girder supports. At least one end of the first profile comprises in the invention a first terminal, the base of which is defined by a first inner corner adjacent to the first profile and a first outer corner longitudinally opposite the first inner corner, the first outer corner having a first descending extension which is received as a support point in a longitudinal slot of the girder support.

Further, the support system comprises a slotted girder support defined by a second profile having a flat upper surface, on the upper surface of which at least one longitudinal slot is provided in the longitudinal direction for receiving a first descending extension of the first terminal of the girder.

The above truss and truss support construction provides a support system for a roof form that is inexpensive to manufacture, enables an operator to place the truss in the truss support from a horizontal position below the roof form, and prevents accidental removal of the truss after installation.

In a preferred embodiment of the girder, an outer edge defining the first descending extension (the outer edge of the first descending extension does not form a right angle, but forms an angle of less than 90 °) as a support point in the longitudinal groove is received in the longitudinal groove of the girder cradle, such that the girder can be removed by pivoting down in relation to the outer edge. In this configuration, the upper ends of the girders do not rise when pivoted downward, thereby preventing movement of the supported formwork. At the same time, in the preferred embodiment, the first descending extension has a sufficient length in order to have the space needed for removing the girder from the girder cradle by pivoting down, without the need to raise the supporting formwork. The length of the first descending extension is thus linked to the depth and width of the longitudinal slot and the distance from the longitudinal slot to the side surface of the truss support.

In a further preferred embodiment of the girder, the lower surface of the girder is at the same level as the upper surface of the girder support in a state where the first descending extension is supported in the longitudinal groove, while the first terminal of the girder has a groove in its lower surface, transverse to the longitudinal direction of the first profile, between the first inner corner and the second outer corner, the depth and width dimensions of which are such as to provide the necessary space for removing the girder from the girder support without lifting the supporting formwork. Due to this configuration, the space for removing the girder from the girder supports remains without raising the supporting template, while enabling the girders to be at the same height with a portion of the girders in a cantilevered state in the case where the lower surface of the girder needs to be supported on the upper surface of the girder supports instead of being supported in the longitudinal grooves through the first terminals.

In a possible refinement of the foregoing embodiment of the spar, the upper corner of the outer surface of the first terminal is rounded, which further facilitates removal of the spar without raising the support form.

As a preferred embodiment, the base of the first terminal or at least the first descending extension has a greater width than the base of the profile, in order to provide greater stability when placing the girder on the girder cradle.

For the truss support, a preferred embodiment may include providing two longitudinal slots in the entire upper surface for receiving two mutually aligned trusses, one on each side of the truss support. In order to position the girders in a transverse position with respect to each other, the system may comprise slotted girder supports comprising at least one second terminal having an upper extension projecting in the shape of a hook, the upper extension being configured to rest in a longitudinal slot of the girder support when in use, the girder supports being adjacent to the second terminal and in a transverse position, the upper surfaces of both girder supports having the same height.

The support system further comprises, in combination with the above-described spar and spar caps, a further element being a post head for a column, the post head comprising a support element for supporting the spar caps, the post head further comprising at least one support seat for supporting a first terminal of the spar, the support seat having a grooved surface or having a height difference surface or a stop protrusion, the surface of the support seat being positioned at a height relative to the support element for the spar caps such that, in use, the support seat acts as a support point for the first terminal of the spar, providing continuity to the longitudinal groove of a previous spar cap. In this way, the system allows the girder to be positioned even in column heads where the girder cradle is interrupted.

Another element of the system comprises a distance holder for self-adjusting the distance between the girder supports, defined by a third profile having at least two lower channels for accommodating two parallel girder supports, the distance between the lower channels being fixed, the lower channels being transverse to the longitudinal direction of the third profile, the width of the inlet area of the lower channels being larger than the width of the girder supports, the width of the lower channels decreasing to be smaller than the width of the girder supports as the lower channels enter further into the third profile. Due to the automatically adjustable structure of the lower channel, the distance holder is able to fix the distance between the truss supports (thereby helping to stabilize the formwork support system) without the need for precise positioning of the truss supports and without the need for precise spacing of the truss supports. Preferably the height from the retainer is sufficiently reduced so that in use it does not contact the panels of the supporting formwork so that only the stringers support the panels of the formwork.

Another important element of the system is a column head comprising horizontal support surfaces for supporting the girder framework, which horizontal support surfaces extend from two opposite sides of the column head. The column head also comprises two cylindrical beams which are parallel to each other, the two cylindrical beams are horizontally arranged, and the two cylindrical beams are symmetrical relative to the central plane of the column head and are fixed above the end part of the horizontal supporting surface. In connection with the column head, the system comprises a girder framework supported on the column head, the girder framework having at least one third terminal, the bottom of which is defined by a second inner corner adjacent to the second profile and a second outer corner longitudinally opposite to the second inner corner, each corner having a second descending extension extending downwards, the two second descending extensions having a suitable distance between them, so that a cylindrical beam of the column head fits between them with a very small clearance, so that the second descending extension outside the cylindrical beam is the only support point of the girder framework on the column head.

Due to this arrangement of the column head and the girder framework, it is possible to place the girder framework with a very small clearance by placing it obliquely from a height lower than the column head and horizontally from the top.

In a preferred embodiment, the prop head may include a post in line with the post and a lowering mechanism for releasing and lowering the prop head along the post, as known to those skilled in the art, to enable the lowering of the horizontal support surface and the cylindrical beam connected thereto. This facilitates dismantling of the spar and spar supports without the need to remove the buckstays.

Further, the column head may also incorporate a horizontal support surface for supporting the girder cradle and at least one support seat for supporting the girder included in the column head. In this case, the horizontal support surfaces of the support truss supports may be engaged with the support bases so that the lowering mechanism may also lower the truss supported thereon. In one possible embodiment, the bearing seats may be connected to the horizontal support surface by plates located at the respective lateral ends. In another possible embodiment, the support seat and the horizontal support surface can be connected by a section bar or by connecting a plurality of plates around the respective inner periphery of the post.

For girder cradles supported on the column head, the end of the outer second descending extension is preferably chamfered or rounded, or terminates at an angle of less than 90 °, so as to reduce the contact area on the horizontal support surface of the column head.

Another possible element of the system is a column head comprising support elements for the girder cradle, a column in line with the column and having a height exceeding the height of the girder cradle, and lowering means for lowering the support elements along the column. The column head comprises at least one set of automatic retaining means for the girder cradle, formed by rigid or semi-rigid rods having a substantially vertical upper section rod, the upper end of which is connected to the column at a height above the girder cradle, optionally joined to the column in an inclined manner with respect to the vertical plane coinciding with the vertical plane of the girder cradle and having a substantially horizontal lower section rod, located slightly above the girder cradle and connected to a deformable pushing element, which is enabled to move towards the column for placement in the supporting element when the girder cradle presses the deformable pushing element into the supporting element, while forcing the deformable pushing element away from the column when the girder cradle is placed above the column.

In one possible embodiment of the column head, the pushing element may consist of a spring-type element fastened to the column. In another possible embodiment, the pushing element may consist of a second bar placed in a symmetrical manner on the other side of the post, the corresponding lower segment being connected, either through the post or on one side of the post, so that the weight or elastic properties of the bar itself generate the force required to restore its rest position once the truss brace is placed.

Alternatively, the posterior head may include any of the features of the previous head.

Another possible column head of the system, which column head consists of at least one support element for a girder cradle, comprises an overlapping attachment of the superimposable girder cradle, which overlapping attachment consists of at least one pressure plate connected to a side of the support element, comprising a support surface configured to support the superimposable girder cradle in a position parallel and at the same height as the support element of the girder cradle. In this way, the truss support need not have different lengths, and the alignment length of the truss support can be adjusted.

In a preferred embodiment, the lap joint attachment comprises lateral retainers for the truss support, consisting of raised flanges at the ends of the pressure plates. Likewise, the lap attachment may also include at least one raised projection configured to be inserted into at least one mating hole located on the lower surface of the stackable truss support.

This latter head and the girder cradle which can overlap with the adaptation hole complementary to the lifting lug can comprise the features of the above-mentioned head and girder cradle, respectively.

These and other characteristics and advantages of the system object of the present invention will become apparent from the description of a preferred but not exclusive embodiment, which is illustrated by way of non-limiting example in the accompanying drawings.

Drawings

FIG. 1 is a top perspective view of the present invention for use with a roof form support system.

Fig. 2A is an enlarged view of detail IIA of fig. 1.

Fig. 2B is an elevation view of a preferred embodiment of a truss support and a first example of a preferred embodiment of a truss positioning.

Fig. 3 is an elevation view of a preferred embodiment of a truss support and a second example of positioning of a preferred embodiment of a truss.

Fig. 4 is an elevation view of a possible disassembly step of the present invention for a roof form support system.

Fig. 5 is an enlarged view of detail IV from fig. 1.

Fig. 6 is an enlarged view of detail V in fig. 1.

Fig. 7A is a top front perspective view of a preferred embodiment of the post head.

Fig. 7B is a rear perspective view of the preferred embodiment of the post head.

Fig. 8A is a top perspective view of a preferred embodiment of a truss support.

Fig. 8B is a cross-sectional view through a median vertical plane of a column head with two anchoring truss braces.

Fig. 9 is a bottom perspective view of detail VIII in fig. 1.

Fig. 10 is a top perspective view of the distance holder.

Detailed Description

As shown in fig. 1, the present invention provides a support system for a roof template that includes multiple elements designed to facilitate assembly and disassembly while providing greater stability to the system.

As shown in fig. 2A and 2B and 3, one element of the support system corresponds to a girder 1 defined by a first profile 11 having a flat lower surface, so that the girder 1 can be supported on the upper surface of one or more slotted girder supports 2. In a preferred embodiment, one end of the first section bar 11 comprises a first terminal 12, the bottom of which is defined by a first inner corner 13 adjacent to the first section bar 11 and a first outer corner 14 longitudinally opposite to the first inner corner 13. The first outer corner 14 has a first descending extension 15.

On the other hand, as shown in the preceding figures, the support system comprises a slotted truss support 2 defined by a second section bar 21, the second section bar 21 comprising a flat upper surface with two longitudinal slots 20 for receiving the first descending extension 15 of the first terminal 12 of the truss 1. In a preferred embodiment, the outer surface of the first descending extension 15 does not end at a right angle, but at an angle slightly less than 90 °, so that its outer edge 16 is defined as a support point in the longitudinal groove 20. At the same time, the length of the first descending extension 15 is such that in its state of resting support in the longitudinal groove 20, the lower surface of the first profile 11 is at the same level as the upper surface of the slotted girder cradle 2. While the first terminal 12 has in its lower surface a groove 17 transverse to the longitudinal direction of the first profile 11 and located between the first inner corner 13 and the first outer corner 14, the depth and width dimensions of which are such that it can provide the necessary space for removing the girder 1 from the slotted girder support 2 without the need to raise a supporting template (not shown in the figure). Likewise, the upper corners 18 of the outer surface of the first terminal 12 are rounded.

Figure 4 shows a front view of a possible dismantling step of the system for supporting roof formworks according to the invention, showing the formwork (E) being supported, and the three tracks of the truss and uprights with the corresponding uprights 3 and lowering means 4. In this step, the two column heads on the right are in the dismounted position, the respective lowering mechanism 4 is unloaded, while the column head 3 on the right still has the loaded lowering mechanism 4, i.e. is anchored in the position of use. Thus, there may be a situation where the girder 1 (in this case the middle girder) is unloaded at one end and loaded at the other end. This occurs each time the system similar to the invention is disassembled, since the operator unloads the column heads 3 of the columns again after unloading all the column heads 3 from the previous track. In these types of systems, when one end of the spar is released while the other end remains loaded on the other spar head, there is a risk of collapsing when the spar cap supporting the spar is unloaded, or the spar is damaged, since one end of the spar is not configured to pivot without moving upwards, or the spar remains horizontal. However, due to the anchoring system between the girder 1 and the girder supports 2 of the present invention, the girder 1 can be inclined without moving upward, thereby avoiding the above disadvantages.

As shown in fig. 5, this preferred embodiment of the system also comprises an example of slotted truss supports 2, the second terminal 22 'of which has an upper extension 25' protruding in the shape of a hook, which is configured to be supported in the longitudinal slot 20 of the slotted truss support 2 described initially, to rest between the slotted truss supports 2 in a transverse position, and the upper surface has the same height.

Another element present in the system comprises a column head 3 on which one or two girder cradles 2 are placed, which column head 3 comprises, in a preferred embodiment, two support seats 31 for supporting the first terminals 12 of the girders 1, one support seat 31 on each side of the column head. As shown in fig. 6 and in the detail of fig. 7A and 7B, the support seat 31 of this exemplary embodiment consists of a surface with a height difference, which is positioned at a height such that it provides continuity to the longitudinal groove 20 of the previous truss support 2 as a support point for the first terminal 12.

The column head 3 of this embodiment in turn comprises a horizontal support surface 32 for supporting the slotted girder support 2, which extends from two opposite sides of the column head 3, and two cylindrical beams 33, which two cylindrical beams 33 are in horizontal position and parallel to each other, symmetrical with respect to the middle plane of the column head 3, and fixed above the ends of the horizontal support surface 32. In this embodiment, the support seat 31 and the cylindrical cross-beam 33 are connected to the horizontal support surface 32 by respective lateral ends.

Likewise, the column head 3 of this embodiment comprises a column 34 in line with the column supporting it and a lowering mechanism 4 for lowering the horizontal support surface 32, the support seat 31 and the cylindrical cross-member 33, which are connected to one another.

As shown in fig. 8A and 8B, the column head 3 of this embodiment is connected to a slotted truss support 2 located on the column head 3. The slotted girder cradle 2 in these embodiments comprises a third terminal 22, the bottom of which is defined by a second inner corner 23 adjacent to the second profile 21 of the girder cradle 2 and a second outer corner 24 longitudinally opposite the second inner corner 23, each of the second inner corner 23 and the second outer corner 24 having a second descending extension (25, 25') spaced apart to fit between them a cylindrical beam 33 of the column head 3 with reduced clearance, the second descending extension 25 of the outside of one cylindrical beam 33 being the only support point for the girder cradle 2 in the column head 3. In this case, the end of the outer second descending extension 25 does not end at a right angle, but at a slightly smaller angle (α), so that its outer edge 26 is defined as a support point on the horizontal support surface 32, thereby reducing the contact area.

As shown in fig. 7A, 7B and 8B, the column head 3 further comprises automatic retaining means 5 for two corresponding truss supports. The automatic retaining device 5 of this embodiment consists of two semi-rigid rods 51, with substantially vertical upper rods fastened at their upper ends to the upper ends of the uprights 34 and with corresponding substantially horizontal lower rods, the two semi-rigid rods 51 being connected by the uprights 34 and intended to be positioned slightly above the slotted girder support 2. In this case the bar is semi-rigid so that when pushed by the slotted girder support and returns to a rest position after placement, the semi-rigid bar 51 can bend at its upper section. However, due to its geometry, the semi-rigid rod 51 resists deformation in the vertical direction, thereby preventing the slotted spar support from being inadvertently loosened.

The column head 3 of this embodiment also comprises an attachment 35, which attachment 35 is a carrier for the girder support 2. The lap attachment 35 comprises a pressure plate 36 connected to the horizontal support surface 32, the pressure plate 36 comprising a support surface 37, the support surface 37 being configured to support the stackable truss support 2' in a horizontal position and at the same height as another truss support 2 supported by the horizontal support surface 32. The lap attachment 35 further comprises a raised projection 38, the raised projection 38 being configured to be inserted into a matching hole 27 located on the lower surface of the stackable truss support 2', as shown in fig. 9.

Finally, as shown in figures 1 and 10, another element of the support system comprises a distance holder between two truss supports. The distance holder is self-adjusting and is defined by a third profile 60 comprising at least two lower grooves 61 for receiving two parallel girder brackets 2, the spacing of which is fixed, the lower grooves 61 being transverse to the longitudinal direction of the third profile 60. The width of the lower channel 61 in its inlet area is greater than the width of the slotted girder support 2, and the width of the lower channel 61 decreases as the lower channel 61 enters the third profile 60 further until it reaches a width less than the width of the girder support 2.

Next, as an option to a possible divisional application, possible claims of the above-mentioned elements and systems are added, which claims supplement the claims indicated in the claims section.

16. A distance holder for a roof formwork support system, the distance holder (6) being arranged between girder supports, the distance holder (6) being a self-adjusting device for a roof formwork support system, defined by a third profile (60), which third profile (60) comprises at least two lower grooves (61) for accommodating two parallel girder supports, and the distance between the girder supports is fixed, which lower grooves (61) are transverse to the longitudinal direction of the third profile (60), characterized in that the width of the lower grooves (61) in their inlet area is larger than the width of the girder supports, and that the width of the lower grooves (61) decreases as the lower grooves (61) enter further into the third profile (60) until reaching a width which is smaller than the width of the girder supports (2).

17. A column head for a roof formwork support system, the column head (3) comprising support elements for girder cradles, a column (34) in line with a column and a lowering mechanism (4) for lowering the support elements along the column (34), the height of the column (34) exceeding the height of the girder cradles, characterized in that the column head comprises at least one set of automatic holding devices (5) for girder cradles, formed by upper bars (51) having a substantially vertical height, the upper ends of which are at a height higher than the girder cradles and connected to the column (34), and having lower bars having a substantially horizontal level, which are positioned higher than the girder cradles and connected to a pushing element that enables the lower bars to move towards the column (34) when the girder cradles press them for placement in the support elements, while forcing them to move away from the column (34) when the girder cradles are placed above the column (34).

18. The post head for a roof formwork support system as defined in claim 17, wherein the urging element comprises a spring-type element secured to the post.

19. The post head for a roof formwork support system as claimed in claim 17, wherein the pushing element comprises a second rod placed in a symmetrical manner on the other side of the post, a corresponding lower section rod being connected, either through the post or on its side, the weight or elastic properties of the rod itself generating the force required to restore its rest position once the truss brace is placed.

20. Column head for a roof formwork support system according to one of claims 17 to 19, characterized in that it comprises the features of the column head (3) according to one of claims 9 to 12.

21. A stud head for a roof formwork support system, the stud head (3) comprising at least one support element for a girder cradle, characterized in that the stud head (3) comprises a lap attachment (35) of a superimposable girder cradle (2 '), the lap attachment (35) consisting of a pressure plate (36) joined to at least one of the support element sides for a girder cradle (2), the pressure plate comprising a support surface (37), the support surface (37) being configured to support a girder cradle (2') in a position parallel and at the same height as the support element of a girder cradle (2).

22. The stud head for a roof formwork support system according to claim 21, characterized in that the lap joint attachment (35) comprises lateral holders for the superimposable truss brackets (2'), constituted by a raised flange at the end of the pressure plate (36).

23. The stud head for a roof formwork support system according to any one of

claims

21 or 20, characterized in that the lap joint attachment (35) comprises at least one ascending protrusion (38), the ascending protrusion (38) being configured to be inserted in at least one adapting hole (27) located on the lower surface of the stackable truss brace (2').

24. The prop head for a roof formwork support system according to any one of claims 21 to 23, characterized in that it comprises the features of the prop head (3) according to any one of claims 17 to 20.

25. An overlappable girder cradle for a roof formwork support system, characterized in that the overlappable girder cradle (2') comprises at least one adaptation hole (27) on a lower surface, which adaptation hole (27) is adapted to a lifting protrusion (38) located in an overlapping attachment (35) of a roof formwork.

26. An overlappable truss support for a roof formwork support system according to claim 25, wherein the overlappable truss support (2') includes the features of the truss support (2) of any one of claims 13 to 15.

27. A roof formwork support system comprising at least one truss as claimed in any one of claims 1 to 4 and at least one truss support as claimed in any one of claims 5 to 7, wherein the ends of the truss are supported in longitudinal channels of the truss support.

28. The roof formwork support system of claim 27, including at least one stud head of claim 8, wherein one end of a truss support of any one of

claims

5 or 6 is mounted in the support element for a truss support, the support seat terminating to a surface of one longitudinal slot of the truss support, the support seat providing continuity for a support point of a first terminal of a truss.

29. The roof formwork support system of any one of claims 27 or 28, comprising at least one distance holder as claimed in claim 16, wherein the two lower channels of the distance holder are mounted in two truss brackets.

30. The roof formwork support system of any one of claims 27 to 28, comprising at least one stud head of any one of claims 9 to 12 and at least one truss brace of any one of claims 13 to 15, wherein one cylindrical cross beam of the stud head is mounted between two second descending extensions of a third terminal of the truss brace.

31. A roof formwork support system as claimed in any one of claims 27 to 30 including a branch stud as claimed in any one of claims 17 to 20, wherein at least one girder strut is supported by the branch stud and is held in support by a stud.

32. The roof formwork support system according to any one of claims 27 to 32, characterized in that it comprises a chapiter head (3) according to any one of claims 21 to 24 and at least one overlappable girder cradle (2') according to any one of

claims

25 or 26, wherein the overlappable girder cradle is supported by a support surface of an overlapping attachment.

The details, shape, dimensions and other contingent elements of the invention may be conveniently substituted by other technically equivalent elements without departing from the scope defined by the claims included below.

Claims

1. A girder for a roof formwork support system, the girder (1) being defined by a first profile (11), the first profile (11) comprising a flat lower surface, the lower surface of the first profile (11) being supportable on the upper surface of one or more girder supports (2) having longitudinal grooves cut therein, characterized in that: at least one end of the first profile (11) comprises a first terminal (12) with a first descending extension (15), the first descending extension (15) being configured as a support point in a longitudinal groove (20) of the truss support (2).

2. The truss for a roof formwork support system according to claim 1, wherein the outer edge (16) of the first drop extension (15) forms an angle of less than 90 °, defined as a support point in a longitudinal groove (20), the first drop extension (15) having a sufficient length to enable removal of the truss (1) from the truss support (2) by pivoting the truss (1) downwards through the outer edge (16) without the truss (1) raising the supporting formwork.

3. The girder for a roof formwork support system according to claim 2, characterized in that the length of the first drop extension (15) is such that in a state in which the first drop extension (15) is supported in the longitudinal groove (20), the lower surface of the first profile (11) is flush with the upper surface of the girder support (2), while the first terminal (12) has a base defined by a first inner corner (13) adjacent to the first profile (11) and a first outer corner (14) longitudinally opposite the first inner corner (13), the first drop extension (15) being located in the first outer corner (14), the base of the first terminal (12) comprising a groove (17) provided in its lower surface, the groove (17) being transverse to the longitudinal direction of the first profile (11) and located between the first inner corner (13) and the first outer corner (14), the depth and width being dimensioned to provide the necessary space for the girder (1) to be pivoted downwards by the groove (16) without lifting up the girder support (1) from the girder support (1).

4. The truss for roof formwork support system as claimed in any one of claims 1-3, wherein an upper corner (18) of an outer surface of the first terminal (12) is rounded.

5. A truss support for a roof formwork support system, the truss support (2) being defined by a second profile (21) comprising a flat upper surface, characterized in that the truss support (2) comprises at least one longitudinal groove (20) provided in the longitudinal direction of the flat upper surface, at least one of the longitudinal grooves (20) being adapted for placing a first descending extension (15) of a truss according to any one of claims 1-4.

6. Truss support for a roof formwork support system according to claim 5, wherein the truss support (2) comprises two longitudinal grooves (20) on the entire upper surface of the truss support, the two longitudinal grooves (20) being symmetrical to each other with respect to a longitudinal vertical middle plane, the two longitudinal grooves (20) being able to accommodate two mutually aligned trusses (1), one truss (1) on each side of the truss support (2).

7. The truss support for a roof formwork support system according to any of the claims 5 or 6, wherein the truss support (2) comprises at least one second terminal (22 '), the second terminal (22') having an upper extension (25 ") protruding in the shape of a hook, the upper extension (25") being configured in use to be supported in a longitudinal groove (20) of the truss support, in a lateral position between two truss supports (2), and having the same height as the upper surface of two truss supports (2).

8. A column head for a roof formwork support system, the column head (3) comprising support elements for a girder cradle (2), characterized in that the column head (3) comprises at least one support seat (31) for supporting a first terminal (12) of a girder according to any one of claims 1 to 4, the support seat (31) having a grooved surface or a stop projection, and the grooved surface or the stop projection being positioned at a height relative to the support elements of the girder cradle such that in its use state the support seat (31) acts as a support point for the first terminal, providing continuity to the longitudinal groove (20) of the girder cradle (2) according to any one of claims 5 or 6.

9. A column head for a roof formwork support system, comprising horizontal support surfaces (32) for truss braces extending from two opposite sides of the column head (3), characterized in that the column head (3) further comprises two cylindrical crossbeams (33) disposed in a horizontal position and parallel to each other, the two cylindrical crossbeams (33) being symmetrical with respect to the vertical median plane of the column head (3) and fixed above the ends of the horizontal support surfaces (32).

10. The column head for a roof formwork support system according to claim 9, characterized in that the column head (3) comprises a column (34) collinear with the column and a lowering mechanism (4) for lowering the cylindrical beam (33) and the horizontal support surface (32) by means of the column (34).

11. A stud head for a roof formwork support system according to any one of claims 9 or 10, including the features of the stud head of claim 8.

12. The stud for a roof formwork support system according to claim 11, characterized in that the horizontal support surface (32) of the truss support (2) is joined to the support seat (31).

13. A truss brace supportable on a column head for a roof formwork support system, characterized in that the truss brace comprises at least one third terminal (22) whose base is defined by a second inner corner (23) adjacent to a second profiled bar (21) and a second outer corner (24) longitudinally opposite the second inner corner, the second inner corner (23) and the second outer corner (24) each having a second descending extension (25, 25') located at a suitable distance for fitting one cylindrical beam (33) on a column head (3) according to any of claims 10 to 13 between two of said second descending extensions, so that the second descending extension outside one cylindrical beam is the only support point of the truss brace.

14. Truss brace supportable on a stud head for a roof formwork support system in accordance with claim 13 wherein the end of the second descending extension (25) on the outside is chamfered or rounded or ends with an angle (a) less than 90 °.

15. A truss brace supportable on a column head for a roof formwork support system as claimed in any one of claims 13 or 14 including the features of the truss brace as claimed in any one of claims 5 or 6.