US20200332541A1 - Connector strip for slab formwork - Google Patents

Connector strip for slab formwork Download PDF

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Publication number
US20200332541A1
US20200332541A1 US16/827,485 US202016827485A US2020332541A1 US 20200332541 A1 US20200332541 A1 US 20200332541A1 US 202016827485 A US202016827485 A US 202016827485A US 2020332541 A1 US2020332541 A1 US 2020332541A1
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US
United States
Prior art keywords
connector strip
prop
formwork
props
region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
US16/827,485
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English (en)
Inventor
Wilfried Haeberle
Bernd Renz
Gisbert Eppelt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Peri GmbH
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Peri GmbH
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Publication date
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Assigned to PERI GMBH reassignment PERI GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EPPELT, GISBERT, HAEBERLE, WILFRIED, RENZ, BERND
Publication of US20200332541A1 publication Critical patent/US20200332541A1/en
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
    • E04G17/04—Connecting or fastening means for metallic forming or stiffening elements, e.g. for connecting metallic elements to non-metallic elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
    • E04G11/48—Supporting structures for shutterings or frames for floors or roofs
    • E04G11/486—Dropheads supporting the concrete after removal of the shuttering; Connecting means on beams specially adapted for dropheads
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
    • E04G11/48—Supporting structures for shutterings or frames for floors or roofs
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
    • E04G11/48—Supporting structures for shutterings or frames for floors or roofs
    • E04G11/483—Supporting heads
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
    • E04G11/48—Supporting structures for shutterings or frames for floors or roofs
    • E04G11/50—Girders, beams, or the like as supporting members for forms
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E04G25/061—Shores or struts; Chocks telescopic with parts held together by positive means by pins
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E04G25/065—Shores or struts; Chocks telescopic with parts held together by positive means by a threaded nut
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
    • E04G17/14—Bracing or strutting arrangements for formwalls; Devices for aligning forms
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G2025/003—Supports therefor, e.g. tripods

Definitions

  • the invention relates to a connector strip for slab formwork, characterized in that it comprises a plurality of spaced coupling regions along its length for engagement with the prop heads of formwork props.
  • the connector strip according to the invention can be used for slab formwork for the pouring of concrete. It can also be used for other slab formwork as well, however, such as for the temporary underpinning of a slab structure during repair work.
  • the connector strip according to the invention can be used to establish a connection between a first structure and a second structure during construction.
  • the first structure may be, for example, an assembly of elements of the slab formwork
  • the second structure may be, for example, a building wall. It may be used to establish other connections as well, for example a connection between slab formwork and an adjacent horizontal steel girder.
  • connection solutions have been found to address these types of connection tasks or the transition region between a first structure and a second structure that were closed manually.
  • connection establishment is linked in a new way to the inclusion of formwork props assigned to the connector strip.
  • the connector strip according to the invention may have a plurality of spaced coupling regions across its length for positive engagement with prop heads of formwork props.
  • the positive engagement can be such that it acts, with respect to forces, substantially in the longitudinal direction of the connector strip; such engagement may be form-fit with regard to forces that act in other directions, but this is not a requirement.
  • the spaced coupling regions referenced each include an end coupling region in the two longitudinal end regions of the connector strip.
  • the two end coupling regions can, but need not, be the only coupling regions of the connector strip.
  • the connector strip When installed, the connector strip thus spans the distance between a first formwork prop and a second formwork prop.
  • the respective end coupling region can be configured in such a way that, when coupled to the respective prop head, the connector strip either substantially covers only half the width of the prop head, measured in the longitudinal direction of the connector strip, or covers the entire width of the prop head. Said half-coverage provides a practical possibility to implement a continuation with a further connector strip in the longitudinal direction of the connector strip. The referenced full coverage is particularly advantageous if there is no continuation there with another connector strip, for example because the end of the connector strip touches a building wall.
  • the connector strip between the two end coupling regions comprises at least one intermediate coupling region for engagement with the prop head of a formwork prop.
  • the intermediate coupling region can, but need not, be configured in deviation from the configuration of the end coupling regions.
  • the connector strip interacts with three or more formwork props.
  • the connector strip according to the invention can further be characterized in that at least one of the coupling regions has an insertion region for engagement with a receiving region on a prop head, or that all coupling regions each comprise an insertion region for engagement with a receiving region on a prop head.
  • the “reverse configuration” is possible as well, namely that at least one of the coupling regions has a receiving region for engagement with an insertion region on a prop head, or that all coupling regions each have a receiving region for engagement with an insertion region on a prop head.
  • the aforementioned insertion region/receiving region engagements which may, but need not, be configured as interlocking engagements may be implemented in a simple manner when the connector strip is mounted on the prop heads of formwork props.
  • the insertion region/receiving region engagements are very robust. The effort required to manufacture the connector strip and the prop heads is comparatively low.
  • the connector strip according to the invention as disclosed in the previous part of the description can further be characterized in that it has, in the cross-section, a leg that is horizontal in use and a leg that is vertical in use; and that at least a portion of the coupling regions is positioned laterally on the leg that is vertical in use.
  • This basic shape of the connector strip is a good prerequisite for the secure positioning of the connector strip on the formwork props.
  • the connector strip according to the invention can have a main body made of metal, in particular aluminum, including aluminum alloys.
  • the main body can be an extrusion part made of metal to which other parts are attached.
  • the connector strip according to the invention can be configured such that its top is provided as part of the shaping surface of the slab formwork.
  • the connector strip is a functional component of the formwork skin of the slab formwork.
  • the top of the connector strip can be equipped with a formwork skin. This can be accomplished by attaching a formwork skin strip at the top.
  • the connector strip according to the invention can have at least one contact region which is provided for contact with a wall, in particular a building wall.
  • a connection function of the connector strip on the wall can be achieved particularly well and an especially reliable positioning of the connector strip relative to the wall can be achieved.
  • the connector strip according to the invention can further be characterized in that the distances between the coupling regions are such that an engagement with the prop heads of formwork props, which stand in the center distance for the width of slab formwork panels, is possible.
  • the connector strip configured in this manner requires, due to its mounting on the prop heads of the respective formwork props, that the formwork props stand in defined center distances that correspond to the respective width of slab formwork panels. As a result, the slab formwork panels adjoining the connector strip can be set up in a particularly simple manner.
  • the connector strip according to the invention can further be characterized in that, when coupled with the respective prop head, it essentially covers only half the width of the prop head, which is measured transversely to the longitudinal direction of the connector strip. This does not rule out that the width, which is measured transversely to its longitudinal extension, is greater than half of the referenced prop head width, in which case a part of the width of the connector strip projects beyond the prop head.
  • the so-called “half coverage” makes it possible to cover the other half of the prop head width with the edge region of a formwork panel or the corner sections of two formwork panels side-by-side.
  • Another object of the invention is an assembly which comprises at least one formwork prop for a slab formwork and a connector strip according to the invention coupled with the prop head of at least one formwork prop as disclosed in the previous part of the description, characterized in that the connector strip rests with its underside on the prop head, and one of the end coupling regions of the connector strip engages with a counter-coupling region of the prop head.
  • This assembly can be implemented in such a way that two formwork props are provided for a slab formwork, and that the connector strip is coupled with one of its two end coupling regions to the two formwork props in the manner referenced.
  • At least one further formwork prop can be provided between the two formwork props referenced, with the underside of the connector strip resting on the prop head of the further formwork prop, and with an intermediate coupling region of the connector strip engaging with a counter-coupling region of the prop head of the further formwork prop.
  • the embodiment can be such that the two formwork props, which are assigned to the two end coupling regions of the connector strip, are secured with a securing device, for example a tripod, whereas the other formwork prop(s), which is (are) assigned to the intermediate coupling region(s) of the connector strip, can be configured without a securing device, but can also be configured with a securing device.
  • the assembly according to the invention can be implemented in such a way that the connector strip defines the mutual spacing of the formwork props as a result of its positioning on formwork props, for example a distance or distances suitable for the width or widths of slab formwork panels.
  • the assembly may also comprise at least one slab formwork panel which rests on each of its two corner sections adjacent to the connector strip, on the prop head of a respective formwork prop assigned to the connector strip and which engages with this prop head.
  • the connector strip thus represents an initial component of a slab formwork; it creates a connection between the slab formwork and a wall, for example; it creates a transition between the wall and slab formwork panels, for example.
  • the height of the connector strip may be such that its top and the top of the at least one slab formwork panel are essentially in one plane.
  • the configuration may be such that the connector strip essentially covers only half of the width of the prop head of the at least one formwork prop, which is measured transversely to the longitudinal direction of the connector strip. This does not rule out that the width of the connector strip, which is measured transversely to its longitudinal extension, is greater than half of the referenced prop head width, in which case a part of the width of the connector strip projects beyond the prop head.
  • the remaining width of the prop head can be used for the edge region of a slab formwork panel or the corner sections of two adjacent slab formwork panels.
  • the top of the connector strip and the top(s) of this slab formwork panel or these slab formwork panels then form a portion of a shaping surface for the concrete.
  • the formwork props provided in the assembly according to the invention and assigned to the connector strip may have prop heads which each have a lowering region on the side facing the at least one adjacent formwork panel, which can be lowered relative to the rest of the prop head to lower the two corner sections of the at least one slab formwork panel adjacent to the connector strip.
  • the feature “in engagement” can be designed such that it becomes “in positive engagement.”
  • Another object of the invention is a method for building at least a portion of a slab formwork, which has a connector strip as disclosed in the previous part of the description, which is characterized by the following steps:
  • each of the first and the second formwork props with a securing device.
  • This method may also include the subsequent step:
  • the method according to the invention may include the:
  • the retaining element can be configured in such a way that it not only prevents the connector strip from moving away from the wall, but also ensures that the spatial position of the connector strip, in particular the alignment of the top of the connector strip as part of the—usually horizontal—shaping surface of the slab formwork, is maintained.
  • the method according to the invention as disclosed in the previous part of the description may include the following further step:
  • the “propping up of the respective formwork panel at these two other corner sections, each with a formwork prop” may also be done in two steps, namely first by propping them up with a formwork prop at one of the two other corner sections, then hanging and pivoting the adjacent slab formwork panel of the row of slab formwork panels upward, and then placing another formwork prop, which props up the second of the two other corner sections and a first of the two other corner sections of the adjacent slab formwork panel. This procedure will become even clearer in the exemplary embodiments below.
  • Another object of the invention is a method for removing at least a portion of a slab formwork, which is a connector strip according to the invention, as disclosed in the previous part of the description, and possibly comprises a slab formwork panel or several slab formwork panels of a row of slab formwork panels that are adjacent to the connector strip,
  • step (i) First remove the connector strip from the prop heads of the first and second formwork props and then remove the first and second formwork props. Alternatively, first remove the first or the second formwork prop, then remove the connector strip from the prop head of the other of these two formwork props, and finally remove the other of the two formwork props.
  • the connector strip may, for example, be placed either basically simultaneously on the first and the second formwork prop, or the connector strip is first placed on the first formwork prop, then pivoted further upwards, and then propped up with the second formwork prop.
  • the retaining element can be attached before or after step (d).
  • Step (i) can be carried out before or after step (h).
  • a further row of slab formwork panels or several rows of slab formwork panels can be fashioned in a corresponding manner.
  • raising the formwork props to a desired or required height is part of the referenced construction of formwork props.
  • this is often done with a screwing motion, i.e. by adjusting the height of part of the formwork prop using a nut and threaded spindle drive.
  • it will be necessary in at least some of the cases when dismantling or removing the formwork props that at least the part of the prop head on which one or more slab formwork panels or the connector strip rest is lowered. At least in some of the cases, this can be done by lowering a prop section, for example with a nut and threaded spindle drive.
  • the connector strip is first attached to the two end formwork props in an assembly situation which does not correspond to the situation described above with upright formwork props next to a wall.
  • the connector strip can be attached to these formwork props. Then, the assembly is placed in the use position next to a wall, for example by lifting it up from the lying position.
  • FIG. 1 a connector strip in a perspective representation, looking obliquely from above onto the top of the connector strip;
  • FIG. 2 the connector strip of FIG. 1 in a perspective representation, looking obliquely from below onto the connector strip.
  • FIG. 3 a first side view of the connector strip of FIGS. 1 and 2 , shown in the direction of arrow III in FIG. 1 ;
  • FIG. 4 a second side view of the connector strip of FIGS. 1 and 2 , shown in the direction of arrow IV in FIG. 1 ;
  • FIG. 5 the connector strip of FIGS. 1 and 2 , shown in a view from below according to arrow V in FIG. 1 .
  • FIG. 6 the connector strip of FIGS. 1 and 2 , shown in the direction of one of its front sides according to arrow VI in FIG. 2 .
  • FIGS. 7 to 12 several chronologically successive phases of the construction of a portion of a slab formwork, each in a perspective representation
  • FIG. 13 an end view of the connector strip formwork prop assembly from FIG. 8 , shown in the direction of arrow XIII in FIG. 8 and on a larger scale;
  • FIG. 14 a detail from FIG. 13 , according to circle A and on a larger scale
  • FIG. 15 the connector strip formwork prop assembly of FIG. 9 , in a perspective view, shown in the direction of arrow XV in FIG. 13 and on a larger scale.
  • FIG. 16 the connector strip formwork prop assembly of FIG. 9 , in a perspective view, shown in the direction of arrow XVI in FIG. 13 and on a larger scale.
  • FIG. 17 a detail from FIG. 16 , according to circle B on a larger scale.
  • the connector strip 2 shown in FIGS. 1 to 6 is largely made of aluminum or an aluminum alloy. In this embodiment, it has a length of 300 cm. Connector strips 2 with longer or shorter lengths are possible; normally, the manufacturer offers an assortment of connector strips 2 staggered in length.
  • the connector strip 2 has a T-shaped cross section, as can best be seen in FIGS. 1 and 2 on the front side and in FIG. 6 .
  • the “T” has one horizontal leg 4 when using the connector strip 2 and one vertical leg 6 when using the connector strip 2 .
  • the vertical leg 6 has for about 1 ⁇ 3 of its height, where it adjoins the horizontal leg 4 , a wider region 8 with a width—measured transversely to the longitudinal extension of the horizontal leg 4 and the vertical leg 6 —which is greater than the width in the lower part of the vertical leg 6 .
  • the wider region 8 has the shape of a substantially square hollow profile, which has a longitudinally extending central slot on its top, which takes up a large part of the width of the wider region 8 .
  • a strip 10 made of wood or plastic is inserted in the longitudinal direction into the cavity of the hollow profile. Screws 12 are screwed into this strip 10 from above through the horizontal leg 4 and through said slot, causing the horizontal leg 4 to be fastened to the vertical leg 6 .
  • the vertical leg 6 is, apart from the referenced strip 10 , an extrusion part made of aluminum or an aluminum alloy.
  • FIG. 4 shows that the further strip 14 consists of several sections.
  • the further strip 14 has an approximately square cross-section. The side of the further strip 14 pointing away from the wider region 8 is vertically aligned with the adjoining long side of the horizontal leg 4 .
  • the connector strip 2 has a total of four coupling regions 20 , 22 for positive engagement, each with a coupling region, which will be described below, at a prop head of a formwork prop.
  • Two of the coupling regions are end coupling regions 20 , which are provided in a longitudinal end region of the connector strip 2 .
  • the other two coupling regions are intermediate coupling regions 22 which are provided between the two end coupling regions 20 on the connector strip 2 .
  • the four coupling regions 20 , 22 can be seen in particular in the bottom view of the connector strip 2 in FIG. 5 .
  • the intermediate connection regions 22 can also be seen well in FIGS. 1 and 2 .
  • FIG. 2 shows the lower end regions 24 of the end coupling regions 20 .
  • the lower end regions 24 project downward beyond the lower end of the vertical leg 6 and are slightly beveled on two sides.
  • the two end coupling regions 20 and their end regions 24 projecting downwards can also be seen well in FIGS. 4 and 6 .
  • the two intermediate coupling regions 22 can be seen well in FIGS. 1, 2, 3, 6 .
  • Each of the coupling regions 20 and 22 represents an insertion region which is accommodated during the assembly of the connector strip 2 with prop heads of formwork props to be described further below, in one receiving region of the respective prop head.
  • each of the coupling regions 20 and 22 is divided into two pins 21 and 23 , which are vertical in use and which are spaced apart in the longitudinal direction of the connector strip 2 .
  • the two pins 21 of the respective end coupling region 20 are a common component made of metal, which is fastened on the side of the vertical leg 6 of the connector strip 2 , for example by screws.
  • the two pins 23 of the respective intermediate coupling region 22 are each a separate component made of metal, which is fastened on the side of the vertical leg 6 of the connector strip 2 , for example by screws.
  • the pins 21 and 23 each have essentially the shape of a hollow square with an attached fastening region for fastening to the connector strip 2 .
  • the pin components can be made from bent sheet metal, in particular sheet steel.
  • the pins 21 of the end coupling regions 20 are located on one of the two long sides of the vertical leg 6 , whereas the intermediate coupling regions 22 are located on the opposite side of the vertical leg 6 .
  • each of the positioning regions 26 is divided into two pins 27 , spaced apart in the longitudinal direction of the connector strip 2 and vertical when the connector strip 2 is in use.
  • the two pins 27 of each positioning region are combined to form a common component which, in the illustrated embodiment, is made from bent sheet metal, in particular sheet steel, and is fastened by screws laterally on the same side of the vertical leg 6 of the connector strip 2 as the end coupling regions.
  • the pins 27 have each essentially the shape of a hollow trapezoid in the horizontal cross-section.
  • the pins 23 and 27 do not protrude downward from the lower end of the vertical leg 6 .
  • the pins 21 , 23 , 27 are not free all around, but are each closely positioned on one side of the vertical leg 6 , as can be seen well in the drawings.
  • the distance between the left front end of the connector strip 2 in FIG. 5 and the center 30 of the next intermediate coupling region 22 is 1 m.
  • the distance between the centers 30 of the two intermediate coupling regions is the same.
  • the distance between the center of the intermediate coupling region 22 on the right in FIG. 5 and the front end of the connector strip 2 on the right in FIG. 5 is the same as well.
  • the respective distance between the center 28 of an end coupling region 20 and the center 30 of the adjacent intermediate coupling region is a little less than 1 m.
  • the positioning regions 26 are each approximately in the middle of the two adjacent coupling regions 20 and 22 .
  • FIGS. 7 to 12 show—by means of a graphical representation of a number of consecutive construction phases—how a connector strip 2 is constructed and then how a series of slab formwork panels 40 is constructed.
  • FIGS. 7 to 17 is designed differently in some details than the connector strip 2 shown in FIGS. 1 to 6 .
  • the vertical leg 6 of the connector strip 2 consists of wood instead of metal, and that pieces of wood 32 or plastic 32 are provided instead of the positioning regions 26 (see FIG. 15 ).
  • FIGS. 7 to 17 clearly show how the connector strip 2 shown in FIGS. 1 to 6 can be used as well.
  • the two walls 52 and 54 together form a corner of the room.
  • a first formwork prop 60 has been set up just next to the second wall 54 and a second formwork prop 62 just next to the second wall 54 .
  • the first formwork prop 60 is also just next to the first wall 52 , i.e. tightly in the corner of the room.
  • Each of the two formwork props 60 and 62 is equipped with a securing device 64 in the form of an adjustable tripod, so that the formwork props 60 and 62 are able to stand vertically without having to be held.
  • the center distance of the formwork props 60 and 62 i.e. the horizontal distance between the vertical central axes of the formwork props 60 and 62 ) is slightly less than 3 m in the illustrated embodiment.
  • the formwork props 60 and 62 must be set up at a correspondingly greater or smaller distance.
  • the connector strip 2 can be placed on the floor, but it is also possible to proceed differently.
  • FIG. 7 further illustrates how the connector strip 2 can be placed on the previously provided props 60 and 62 by just one person (with other types of placement of the connector strip 2 being possible).
  • the connector strip 2 was first placed on a prop head 61 of the first prop 60 from above in a slightly inclined position. Then, using a shuttering aid 66 (such as a rod, the length of which is a little less than the height of the specific room), the connector strip 2 is held at a point that is not very far from the right end of the connector strip 2 in FIG. 7 .
  • a shuttering aid 66 such as a rod, the length of which is a little less than the height of the specific room
  • the shuttering aid 66 By means of the shuttering aid 66 , a worker is able to lift this right end of the connector strip 2 somewhat higher than a prop head 63 of the second prop 62 and then place it on the prop head 63 from above; refer to the second phase shown in FIG. 8 .
  • the described placement of the connector strip 2 on the prop heads 61 and 63 takes place in such a way that the left end coupling region 20 of the connector strip 2 in FIG. 7 comes in positive engagement with a receiving region 70 of the first prop 60 (see in particular FIG. 14 ) and that the right end coupling region 20 of the connector strip in FIG. 7 comes in positive engagement with a receiving region 70 on the prop head 63 of the second prop 62 (see in particular FIG. 14 ).
  • the props 60 , 62 , etc. shown in FIGS. 7 to 17 each have a positioning extension 72 which projects upwards in the center of the prop head 61 , 63 , etc., see in particular FIGS. 14 and 17 .
  • the connector strip 2 is lowered with its vertical leg 6 into the space between the second wall 54 and the positioning extensions 72 of the prop heads 61 and 63 in such a way that the positioning regions 26 of the connector strip 2 rest against the second wall 54 with the their side 29 facing away from the vertical leg 6 .
  • the two pins 21 of this end coupling region 20 each arrive at a receiving space between two essentially vertical flanges 74 of the prop head 61 .
  • This can be seen at the top right in FIG. 15 .
  • the four flanges 76 which can be seen in FIG. 17 , are also essentially inversely present on the other side of the prop head 61 , that is to say behind the positioning extension 72 and behind the vertical leg 6 of the connector strip 2 which hides the flanges 74 .
  • the engagement of the two pins 21 in the two receiving spaces described there creates a positive engagement between the connector strip 2 and the prop head 61 with regard to forces that act in the longitudinal direction of the connector strip 2 .
  • the connector strip 2 can be constructed with its front end against the first wall 52 .
  • the connector strip 2 covers the entire width of the first prop head 61 measured in the longitudinal direction of the connector strip 2 .
  • the respective end coupling region 20 of the connector strip 2 only uses the pin 21 which is closer to the front end of the connector strip 2 for engagement with a receiving region 70 of the second prop head 63 .
  • the space used between two flanges 74 of the prop head 63 is used.
  • the space between the two further flanges 74 on the side of the second prop 62 facing the second wall 54 (initially) remains free.
  • the connector strip 2 covers only half of the width of the prop head 63 measured in the longitudinal direction of the connector strip 2 . Even when, however, only half the width of the prop head is used, a positive engagement between the connector strip 2 and the prop head 63 is created with respect to forces in the longitudinal direction of the connector strip 2 .
  • the lower end of the vertical leg 6 of the connector strip 2 rests on the bearing surfaces 78 of the prop heads 61 and 63 , see FIG. 14 .
  • the pins 21 of the end coupling regions 20 project further downward than the level of the bearing surfaces 78 , which facilitates the “threading” of the end regions 24 of the pins 21 into the space between two flanges 74 .
  • the vertical leg 6 of the connector strip 2 is locked between the positioning extension 72 and the surface of the second wall 54 facing the room.
  • FIGS. 13 and 14 show particularly clearly that the connector strip 2 , more specifically its horizontal leg 4 , essentially only covers half the width of the respective prop head 61 , 63 , 81 , if measured transversely to the longitudinal extension of the connector strip 2 , so that the other half of this width can be covered by an edge region of a slab formwork panel 40 placed on top or by two corner sections 90 and 92 of two slab formwork panels 40 placed side by side.
  • the tops of the connector strip 2 and the slab formwork panels 40 referenced lie in a common plane and, directly adjacent to one another, together form a portion of a shaping surface for concrete.
  • first prop 60 and the second prop 62 are provided with an option to adjust the height of the prop heads 61 and 63 , in the illustrated embodiment by means of an external thread at the upper end region of a lower prop section 85 , and an inner threaded sleeve 82 in threaded engagement, the upper front side of which acts on a bolt 84 which passes through one of several horizontal bores in an upper prop section 86 .
  • FIGS. 7, 15 and 16 show particularly well what was described above. The height of the respective prop head 61 or 63 is adjusted by rotating the inner threaded sleeve 82 .
  • two further props 80 have been placed between the two props 60 and 62 .
  • the further props 80 are constructed in the same way as the props 60 and 62 , but do not have a securing device 64 .
  • the prop head 81 has been brought in positive engagement with a receiving region 83 , each with one of the two intermediate coupling regions 22 .
  • This engagement is best seen in FIGS. 16 and 17 .
  • the receiving region 83 used for this engagement is—in the viewing direction of FIG. 17 —delimited on the left and right by a flange 85 which projects upwards and, with the exception of its foot region, obliquely outward and away from said flange.
  • the positioning extension 72 is also located in the space between the two flanges 85 , but the respective part of its height has some room between the two pins 23 .
  • the two pins 23 each exactly fit with their outer side 87 , which faces a front end of the connector strip 2 , between the foot regions of the two flanges 85 , which creates the respective positive engagement.
  • the pins 23 do not protrude downward from the vertical leg 6 of the connector strip 2 . It can thus be seen that the receiving region 83 of the respective further prop 80 for the intermediate coupling region 22 of the connector strip 2 , which is configured as an engagement region, is a receiving region that is configured differently than the receiving region 70 described above for the end coupling region 20 of the connector strip 2 configured as an insertion region.
  • the two further props 80 are inevitably located at a center distance of 1 m between each other and the further prop 80 on the right in FIG. 9 is inevitably located at a center distance of 1 m from the prop 62 .
  • the center distance between the prop 60 and the further prop 80 on the left in FIG. 9 is slightly less than 1 m (because the connector strip 2 completely covers the width of the prop head 61 , measured in the longitudinal direction of the connector strip 2 ).
  • the engagement of the coupling regions 20 and 22 of the connector strip 2 with the four prop heads 61 , 63 , 81 , 81 of the four props 60 , 62 , 80 , 80 assigned to the connector strip 2 demands or defines that the props are all in the described center distances.
  • the further props 80 can each be set up by just one worker.
  • the further props 80 are screwed up or down until they have the correct height.
  • FIG. 9 furthermore shows that a retaining element 86 has been attached to the second wall 54 .
  • the retaining element 86 has the shape of a substantially vertically running rail. At its upper end, the retaining element 86 has a lug 88 which can be displaced in the longitudinal direction of the retaining element 86 and which, in the extended state, comes in contact with the side surface of the vertical leg 6 of the connector strip 2 which faces away from the second wall 54 (see in particular FIG. 16 ). This way, the retaining element 86 holds the connector strip 2 against the second wall 54 .
  • a slab formwork panel 40 with two corner sections 90 and 92 is hung on the prop head 61 of the first prop 60 and on the prop head 81 of the adjacent prop 80 .
  • the four flanges 76 which are provided on the side of the respective prop head 61 or 81 facing away from the second wall 54 , have sections that protrude above the level of the bearing surface 78 and also have small lugs 90 pointing towards the connector strip 2 at the upper end.
  • the corner sections 90 and 92 of the slab formwork panel 40 can thus each be hung in the space between the positioning extension 72 and the upwardly projecting regions of the flanges 76 .
  • the corner section 90 occupies the entire width of the prop head 61 , measured in the longitudinal direction of the connector strip 2 , and the corner section 92 occupies only half of the width of the prop head 81 , which is measured in the same way.
  • the suspended slab formwork panel 40 initially hangs down.
  • the slab formwork panel 40 with its two other corner sections 94 and 96 is pivoted upwards with the help of a shuttering aid 66 .
  • a shuttering aid 66 was already described in connection with FIG. 7 .
  • FIG. 11 shows more clearly that the rod-like shuttering aid 66 telescopically consists of two sections which are displaceable relative to one another, so that the effective length of the shuttering aid 66 can be adjusted.
  • a worker can pivot the slab formwork panel 40 into a position that is substantially either horizontal or even pivoted upward.
  • a further prop 80 is positioned on the corner section 94 adjacent to the first wall 52 (with the final result being shown in the sixth phase of FIG. 12 ).
  • the prop head 81 of this further prop 80 is designed in the same way as the previously described prop heads 61 , 63 , 81 , 81 , so that a form-fitting engagement between the corner section 94 and the prop head 81 of the last-placed, further prop 80 is possible.
  • FIG. 11 also shows that two further slab formwork panels 40 have been hung on the prop heads 81 and 63 of the two further props 80 or the second prop 62 , each with the two corner sections 90 and 92 .
  • the second formwork panel 40 has been pivoted upward and a common further prop 80 has been brought into position for the corner section 96 of the first formwork panel 40 and for the corner section 94 of the second formwork panel 40 .
  • the further props 80 of the second series of props which are a little more than one formwork panel length away from the second wall 54 , are screwed up or down in such a way that the formwork panels 40 of this first series of formwork panels are all in a horizontal position.
  • the portion of a slab formwork visible in FIG. 12 which contains four props 60 , 62 , 80 , 80 next to the second wall 54 and a second series of props 98 and three slab formwork panels 40 spaced apart from the second wall 54 in the manner described, can be continuously extended in the longitudinal direction of the second wall 54 .
  • a prop with a securing device is placed in addition to the second wall 54 essentially at a distance of the length of a further connector strip 2 .
  • the further connector strip 2 aligned with the connector strip 2 described above, is placed on two props in the manner described.
  • the first series of slab formwork panels 40 along the second wall 54 can continue to be constructed.
  • the section of the slab formwork containing a first series of slab formwork panels 40 can also be further constructed with a second, third, etc. series of slab formwork panels 40 .
  • the slab formwork panels 40 are hung in the prop heads 81 of the second row of props 80 in the manner described, pivoted upwards and propped up with props 80 at the corner sections that are pivoted upwards. This process can be continued until the entire slab formwork is completed, if necessary with the help of fitting pieces.
  • the described length of the connector strip 2 and the described number of coupling regions 20 and 22 of the connector strip 2 constitute an exemplary embodiment. According to the invention, longer or shorter connector strips 2 are provided as well.
  • the number of coupling regions 20 and 22 depends for which slab formwork panel widths and for how many slab formwork panels 40 the connector strip 2 is configured. Connector strips 2 that have only two end coupling regions 20 and no intermediate coupling region 22 , that is to say are only configured for a single slab formwork panel width are possible as well. It is also possible to configure connector strips 2 such that the coupling regions are at different distances from one another, so that slab formwork panels 40 of different widths are connected to one and the same connector strip 2 .
  • the procedure previously described for the construction of the portion of the slab formwork is reversed. Only the dismantling or removal of the first row of slab formwork panels that connects to the connector strip 2 is described in more detail here.
  • the prop heads 61 , 63 , 81 , 81 of the props 60 , 62 , 80 , 80 referenced each have a lowering region 92 , as can be seen in particular in FIG. 14 .
  • the four flanges 76 with the four lugs 90 can be pivoted downward together with the bearing surface 78 , for example, by 30° after a wedge plate 95 has been moved into a position that releases the pivoting lowering.
  • the edge girder assigned to the two corner sections 90 and 92 of the respective slab formwork panel 40 is moved to a lower position.
  • the respective slab formwork panel 40 can be pivoted downward with its two corner sections 94 and 96 without one of the connector strips 2 adjacent to the edge region of the formwork skin of the slab formwork panel 40 digging into the concrete of the cast ceiling from below.
  • replacement props (not shown) were placed somewhat further away from the connector strip 2 than the corner sections 94 and 96 , which prop up the cast ceiling there.
  • the replacement props are props with prop heads that are constructed much more simply than the prop heads 61 , 63 , 81 ; these simpler prop heads are placed directly against the cast ceiling from below and prop it up there. Therefore, the prop heads 81 of the props 80 , whose prop heads 81 prop up the corner sections 94 and 96 , can be screwed slightly downward.
  • a shuttering aid 66 is applied.
  • the lowering regions 92 of the prop heads 61 and 80 which are in engagement with the corner sections 90 and 92 , are pivotally lowered by releasing the wedge plate 95 .
  • the slab formwork panel 40 can be pivoted downward with its corner sections 94 and 96 with the help of the shuttering aid 66 . Then the corner sections 90 and 92 are unhooked from the prop heads 61 and 81 and the slab formwork panel 40 is removed.
  • replacement props are placed and screwed upward against the cast ceiling in addition to the props 60 , 62 , 80 , 80 of the first row of props at a somewhat greater distance from the second wall 54 than these props. In many cases, it is not necessary to provide replacement props because the cast ceiling is adequately propped up by the second wall.
  • the further props 80 are removed.
  • the prop heads 81 are screwed slightly downward.
  • the further props 80 can easily be removed.
  • the retaining element 86 is removed.
  • the assembly consisting of the end props 60 and 62 and the connector strip 2 stands by itself and can easily be removed.
  • the prop heads 61 and 63 are screwed slightly downward.
  • the connector strip 2 is removed in the reverse manner described for its assembly.
  • the connector strip 2 according to the invention can be combined with many types of prop heads and with other types of slab formwork panels. There some early stripping methods, in which the props used for the construction of the slab formwork are left standing for example with props equipped with prop head and the slab formwork panels are removed from these props.
  • the connector strip 2 according to the invention can be used in such surroundings as well.
  • the connector strip 2 according to the invention can also be used for slab formwork in which early stripping is to be avoided.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Replacement Of Web Rolls (AREA)
  • Building Environments (AREA)
  • Rod-Shaped Construction Members (AREA)
US16/827,485 2019-03-22 2020-03-23 Connector strip for slab formwork Pending US20200332541A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019107430.4A DE102019107430A1 (de) 2019-03-22 2019-03-22 Anschlussleiste für Deckenschalungen
DE102019107430.4 2019-03-22

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US16/827,485 Pending US20200332541A1 (en) 2019-03-22 2020-03-23 Connector strip for slab formwork

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US (1) US20200332541A1 (de)
EP (1) EP3712352B1 (de)
CN (1) CN111719855A (de)
CA (1) CA3076326C (de)
DE (1) DE102019107430A1 (de)
DK (1) DK3712352T3 (de)
ES (1) ES2930427T3 (de)
HR (1) HRP20221340T1 (de)
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US11149434B2 (en) * 2017-08-02 2021-10-19 Doka Gmbh Method for producing a ceiling element and ceiling formwork
CN114657848A (zh) * 2022-03-14 2022-06-24 青岛冠通市政建设有限公司 一种新型沥青混合料自动化铺设装置及其使用方法

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US6176463B1 (en) * 1994-04-21 2001-01-23 Doka Industrie Gmbh Ceiling formworking system for forming ceilings
WO1999009276A1 (en) * 1997-08-15 1999-02-25 Loayza, Inc. A structural framing system
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HRP20221340T1 (hr) 2022-12-23
DK3712352T3 (da) 2022-11-14
CA3076326C (en) 2023-10-24
EP3712352B1 (de) 2022-10-12
PL3712352T3 (pl) 2022-12-19
CA3076326A1 (en) 2020-09-22
ES2930427T3 (es) 2022-12-12
EP3712352A1 (de) 2020-09-23
DE102019107430A1 (de) 2020-09-24
RS63765B1 (sr) 2022-12-30

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