WO2009009898A1 - Concrete slab depth varying system - Google Patents

Concrete slab depth varying system Download PDF

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Publication number
WO2009009898A1
WO2009009898A1 PCT/CA2008/001313 CA2008001313W WO2009009898A1 WO 2009009898 A1 WO2009009898 A1 WO 2009009898A1 CA 2008001313 W CA2008001313 W CA 2008001313W WO 2009009898 A1 WO2009009898 A1 WO 2009009898A1
Authority
WO
WIPO (PCT)
Prior art keywords
varying system
saddle beam
depth varying
saddle
slab depth
Prior art date
Application number
PCT/CA2008/001313
Other languages
French (fr)
Inventor
Paul Gillespie
Jianhua Zhang
Original Assignee
Gillespie Enterprises Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CA 2594047 external-priority patent/CA2594047A1/en
Application filed by Gillespie Enterprises Inc. filed Critical Gillespie Enterprises Inc.
Publication of WO2009009898A1 publication Critical patent/WO2009009898A1/en

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G13/00Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
    • E04G13/06Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/36Forms, 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
    • E04G11/40Forms, 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 for coffered or ribbed ceilings
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G13/00Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
    • E04G13/06Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall
    • E04G13/066Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall for overhangs

Definitions

  • the present invention relates to concrete slab form systems, commonly used for the floors of multi-story buildings, and more particularly to a support system of cooperating structural components that are used to support and form the variable depth portions of concrete slabs.
  • Drop head system An alternative to the above that is sometimes utilized is generally referred to as a "drop head" system.
  • This type of system allows removal (stripping) of form components without disturbing the slab supporting components.
  • Drop head systems invariably rely on the use of a support component (shoring posts) and a beam to receive and support the form panels.
  • Drop head systems are disclosed in U.S. Patent No. 5,614,122 to Schworer, U.S. Patent No. 5,310,153 to Jackson and U.S. Patent No. 1 ,907,877 to Roos.
  • the above references fail to address two common drop head system deficiencies.
  • a first deficiency with existing drop head systems is the accommodation of various slab thicknesses. It is common practice to leave the problem of changes in slab thickness up to the contractor to solve on site. This contractor typically has carpenters build single use forms in the areas affected, significantly impacting productivity, material cost, and labour cost.
  • a further deficiency in the prior art involves slab edges that require form to cantilever out beyond supporting walls or columns.
  • the form must extend beyond the slab edge to be formed in order to provide workers with a place to stand when pouring the concrete.
  • These forms challenge the form designer to provide a convenient and safe means of erecting and dismantling the forms.
  • Existing solutions are less than satisfactory due to component complexity and the potential exposure to accidental falls experienced by workmen.
  • the slab depth varying system described herein provides a means to conveniently accommodate changes in concrete slab thickness. Changes in slab thickness are, for example, often required adjacent to columns.
  • the applicant's slab depth varying system can be effectively employed in conjunction with existing concrete forming systems.
  • Existing concrete form systems generally comprise a primary form at a first elevation suspended by shoring posts.
  • the shoring posts generally include vertically spaced diametric openings through at least a portion of the posts. These openings are principally utilized when adjusting the height of the shoring posts.
  • the applicant's slab depth varying system provides saddle beams for supporting a secondary flat form at a desired second elevation below the primary form. Coupling means are provided for coupling the saddle beams to the shoring posts, which are suspending the primary form, at the second elevation. After concrete poured on the secondary form has had an opportunity to partially cure, stripping of the secondary form and the saddle beams is accommodated by a means of lowering the saddle beams from their initial height to a lower stripping height. The distance between the two heights is generally small, typically between 0.5 and 1.75 inches.
  • the saddle beams used in the applicant's slab depth varying system are designed to rotate about one end, in one or two planes, into the forming position and similarly rotate in reverse when stripping. This feature readily accommodates the installation of saddle beams at slab edges through the use of raking (not vertical) shore assemblies.
  • the saddle beam that is to be installed in a cantilevered position is hung from a shoring post, usually positioned two or more feet back from the edge of a completed slab or working surface.
  • the raking shore in a generally horizontal position, is then attached to the lower edge of the hanging saddle beam with a connection that permits rotation. Workmen can then rotate the saddle beam into the pouring position by simply pushing outward on the raking shore assembly without leaving the safety of the slab they are working from.
  • the raking shore assembly is then attached to a pre-installed shoe.
  • Safety barriers can be affixed to the raking shore assembly to protect against accidents.
  • FIG. 1 shows a perspective view of one embodiment of a slab depth varying systems.
  • FIG. 2 shows a plan view of a coupling means of the slab depth varying system of FIG. 1.
  • FIG. 3 shows a side view of the coupling means of FIG. 2.
  • FIG. 4 shows a plan view of another coupling means of the slab depth varying system.
  • FIG. 5 shows a side view of the coupling means of FIG. 4.
  • FIG. 6 shows a side view of a saddle beam of the slab depth varying system of FIG. 1.
  • FIG. 7 shows a front view of the saddle beam of FIG. 6.
  • FIG. 8 shows a side view of a support pin of the slab depth varying system of FIG. 1.
  • FIG. 9 shows a schematical view of one embodiment of a slab depth varying systems.
  • FIG. 10 shows a perspective view of a mounting shoe of the slab depth varying system of FIG. 9.
  • FIG. 1 1 shows a perspective view of a safety barrier adaptor of the slab depth varying system of FIG. 9.
  • FIG. 12 shows a plan view of another coupling means of the slab depth varying system.
  • FIG. 13 shows a side view of the coupling means of FIG. 12.
  • FIG. 14 shows a perspective view of the coupling means of FIG. 12 coupled to the saddle beam of FIG. 6.
  • Existing concrete form systems generally comprise a primary form at a first elevation suspended by shoring posts.
  • the shoring posts generally comprise vertically spaced diametric openings through at least a portion of the posts. These openings are principally utilized when adjusting the height of the shoring posts.
  • slab depth varying system for an existing concrete form system is herein described in detail.
  • slab depth varying system is used to vary the depth of a slab being poured.
  • the slab depth can be varied, for example, to accommodate concrete beams or to provide a lowered edge for the slab being poured.
  • the slab depth varying system generally comprises saddle beams for supporting a secondary flat form at a second elevation and coupling means for coupling the saddle beams to the shoring posts of an existing concrete form system.
  • FIG. 1 shows an embodiment of the applicant's slab depth varying system 200 installed on an existing concrete form system 100.
  • Coupling means 300 generally comprise post connecting means 310 for connecting the coupling means to a shoring post 110 and beam connecting means 350 extending from the post connecting means 310 for connecting the coupling means to a saddle beam 400.
  • the post connection means 310 of coupling means 300 are lockable to the shoring post 110 in different orientations.
  • the orientation of the post connection means 310 determines the vertical position of the beam connecting 350 means relative to the shoring post.
  • the post connecting means 310 can comprise, for example, two clamp portions 312 that are hingedly coupled to each other at their adjacent ends by two fastening elements 314. It would be appreciated by one skilled in the art that the clamp portions 312 can be conveniently assembled around the shoring post 110 by, for example, hingedly coupling the two clamp portions 312 at one end with one of fastening elements 314, positioning the clamp portions adjacent one side of the shoring post 110, rotating the clamp portions around the fastening element until the uncoupled ends are adjacent on the opposite side of the shoring post, and then coupling the uncoupled ends with the other fastening element.
  • the fastening elements 314 can be, for example, pins with apertures for receiving cotter pins.
  • the clamp portions 312 have vertically spaced openings 316 therethrough.
  • the vertical spacing of the clamp portion openings 316 is less than the vertical spacing of the post openings 112 of shoring post 110.
  • the vertically spaced openings 316 are paired in diametric opposition; there is, for example, a lower pair of openings and upper opening pair openings.
  • the clamp portions 312 are locked in position around the shoring post 110 by a locking pin 320 inserted through one pair of the clamp portion openings 316 and one of the post openings 112.
  • the locking pin 320 can be, for example, a pin with an aperture for receiving a cotter pin.
  • the clamp portions 312 are round to accommodate a round shoring post. Alternatively, the clamp portions can be square or rectangular if the shoring post is square or rectangular.
  • At least one of the clamp portions 312 is provided with beam connecting means 350.
  • the beam connecting means 350 can comprise, for example, U-shaped supports 352 extending from the lower half or upper half of the clamp portions' outer surface. With reference to FIG. 3, the U-shaped supports 352 extend from the lower half of the clamp portions' outer surface.
  • the clamp portions 312 can be locked to the shoring post 110 at a particular post opening 112 in different orientations.
  • the locking pin 320 can be inserted through the lower pair or the upper pair of vertically spaced openings 316.
  • the clamp portions 312 can also be inverted and then locked to the shoring post.
  • the different orientations of the clamp portions 312 can be utilized to adjust the vertical position of the U-shaped supports 352.
  • the U-shaped supports 352 can be fixedly attached to the clamp portions 312 as shown in FIGS. 2 and 3.
  • the orientation of the saddle beams 400 is determined by the orientation of vertically spaced openings 316 and post openings 112.
  • the assembly of a shoring post system in which panels are affixed to a drop head will determine the orientation of post openings 112.
  • the U-shaped supports can be attached to the clamp portions' outer surface by vertical hinge means (not shown).
  • the vertical hinge means allow the U-shaped supports to rotate in a generally horizontal plane around the hinge means. This rotation in a horizontal plane facilitates the attachment of saddle beams 400 to the U-shaped supports 352 and allows for flexibility in the orientation of installed saddle beams relative to the shoring posts 110.
  • the U-shaped supports 352 can alternatively be attached to the clamp portions' outer surface by a vertical fine adjustment means comprising, for example, vertical screws 370.
  • the vertical screws allow for fine adjustment of the vertical position of U-shaped supports 352 relative to the clamp portions 312 and allow the U-shaped supports to rotate in a generally horizontal plane around the vertical screws 370.
  • the height of the U-shaped supports can be roughly adjusted by selecting the appropriate post opening 112 and clamp portion 312 orientation.
  • the vertical screws 370 can then be used for fine height adjustment until the U-shaped supports are at a desired height.
  • Another aspect of applicant's slab depth varying system 200 is the ability of the saddle beam 400 to move from a first pouring position, wherein the saddle beam supports a secondary cement form in a position for receiving poured concrete, to a second stripping position lower than the pouring position.
  • the U-shaped supports 352 are adapted to support the saddle beam in the pouring position and the stripping position as follows.
  • the saddle beam 400 generally comprises at least one beam opening at one end of the beam, for example, beam openings 402.
  • the saddle beam also comprises an L-shaped retaining flange 404 extending from the top of the saddle beam.
  • the retaining flange is generally parallel to the axis of the beam openings 402. It would be appreciated by one skilled in the art that the saddle beam could be of various lengths.
  • saddle beam 400 could be of various predetermined lengths based on the panel size of the panels being utilized for the main slab. Specifically, in a system in which beams are included in a slab, the main portion of the slab would be supported by panels on drop heads. If the panel size was, for example, 4 feet by 8 feet, support posts would necessarily be placed every 4 feet in one direction and every 8 feet in the other direction. In order to minimize the number of saddle beam 400 sizes required, the saddle beams could be affixed between adjacent support posts and thus, principally, be either 4 feet or 8 feet in length. In operation the support posts and panels would be erected on either side of the concrete beam, and the post connecting means 310 would be installed on the shoring posts adjacent the concrete beam at a desired height. The saddle beam 400 would be extended between the adjacent post connecting means 310 and a platform and beam sides could then be constructed utilizing a saddle beam 400 on either side of the concrete beam.
  • the U-shaped supports 352 comprise a base 354 and two sides 356.
  • the sides of the U-shaped supports have an opening 358 therethrough.
  • the gap between the two sides 356 of the U-shaped supports is sized to receive one end of the saddle beam 400.
  • a horizontal support pin 380 removably inserted through the openings 358 in the sides 356 and beam opening 402 can support the saddle beam in the pouring position.
  • Support pin 380 is, for example, a tampered support pin with an aperture 382 for receiving a cotter pin, best shown in FIG. 8.
  • An upper surface 360 of sides 356 can support the retaining flange 404 of the saddle beam and thereby support the saddle beam in the stripping position.
  • the saddle beam 400 When the saddle beam 400 is in the pouring position and the support pin 380 is removed, by, for example, hammer strokes, the saddle beam falls until the retaining flange 404 catches the upper surface 360 of sides of U-shaped support 352. Thus, the saddle beam 400 transitions from the pouring position to the lower stripping position.
  • the support pin 380 can rotatably support the saddle beam in the pouring position and the saddle beam 400 comprises at least one diagonal corner cutout at an end of the saddle beam, for example, cutouts 406.
  • the cutouts 406 allow the saddle beam to rotate a distance around the support pin, preferably at least 45 degrees. This rotation in a vertical plane allows saddle beam 400 to hang-down after attachment to coupling means 300 of the slab depth varying system 200.
  • the raking shore assembly 500 generally comprises a telescopic member 510 with a pivotal connection 520 and a mounting shoe 530.
  • the mounting shoe 530 as shown in FIG. 10, is pre-installed to a lower working surface 120 before erection starts.
  • the telescopic member 510 is extended to a length suitable for positioning the saddle beam 400 horizontally; portions 512 and 514 are telescopic, with portion 514 sliding into portion 512.
  • the telescopic member can also include a fine adjustment means (not shown), for example, an adjusting screw, for adjusting the length of the telescopic member.
  • the telescopic member 510 includes the pivotal connection 520 at one end.
  • the pivotal connection 520 is then attached via pins 522, as shown in FIGS. 1 and 9, to the end of the saddle beam opposite the shoring post 110.
  • the telescopic member 510 is then used to rotate the saddle beam into position and is thereafter affixed to an affixing means 532 of mounting shoe 530.
  • the rotation of the saddle beam can be in a vertical plane around the support pin 380.
  • the rotation of the saddle beam can additionally be in a horizontal plane around, for example, vertical screw 370 shown in FIG. 5, so that at no time do workmen have to work beyond the edge of the working surface 120.
  • the telescopic member 510 can be affixed to the affixing means 532 with, for example, a pin affixed through concentric holes in the telescoping member and the affixing means.
  • FIG. 9 shows the completed installation.
  • a support pin could be placed underneath post coupling means 310, holding the post coupling means 310 in roughing its final height while allowing post coupling means 310 to freely rotate about shoring post 110.
  • Saddle beam 400 could then be connected to post coupling means 310 as described above. The connection in this case would be done over the existing slab.
  • the saddle beam could then be rotated into place by moving the saddle beam in the vertical plain around support pin 380 and in the horizontal plain by rotating around shoring post 110.
  • locking pin 320 can then be inserted through vertically spaced openings 316 to connect post clamping means 310 to shoring post 110. In this way, a workman never needs to extend beyond the edge of the existing slab.
  • the pivotal connection 520 can include an affixing means 526 for affixing a first safety barrier to the pivotal connection.
  • a safety barrier 528 can be affixed to the affixing means 526 with, for example, a pin, the safety barrier extending above the saddle beam 400, generally perpendicular to the saddle beam.
  • the mounting shoe 530 can also include a plurality of affixing means 534 for affixing a second safety barrier to the mounting shoe.
  • a safety barrier 536 can be affixed to the affixing means 534, the safety barrier extending above the lower working surface 120, generally perpendicular to the lower working surface.
  • the raking shore assembly 500 can also include a safety barrier adaptor 540 as a discrete component.
  • the safety barrier adaptor 540 comprises two affixing means: first affixing means 542 for affixing the safety barrier adaptor to the saddle beam 400 and a plurality of second affixing means 544 for affixing a safety barrier to the safety barrier adaptor 540.
  • the safety barrier adaptor is designed to be affixed to the saddle beam 400 concurrently with the pivotal connection 520.
  • another aspect of the applicant's slab depth varying system 200 is a securing means for preventing horizontal movement of the saddle beam 400, generally along its axis away from the shoring post 100, that can accommodate the vertical transition of the saddle beam from the pouring position to the stripping position.
  • the securing means can comprise, for example, aligned vertical slots 390 through the sides 356 of one of the U-shaped supports 352 and a transition pin 392.
  • the transition pin 392 can be removably inserted through the slots 390 and a secondary beam opening 408 (best seen in FIG. 6) in saddle beam 400.
  • the transition pin 392 can be secured in the inserted position by, for example, one or more cotter pins.
  • the slots 390 are sized to prevent horizontal moment of the transition pin 392 perpendicular to the pin's axis and, at the same time, allow the transition pin to move vertically between the upper and lower ends of the slots.
  • the transition pin 392 inserted through the slots 390 and the secondary beam opening 408 of saddle beam 400 prevents horizontal movement of the saddle beam along its axis while allowing vertical movement of the saddle beam corresponding to the transition pin's own range of vertical movement.
  • the length of the slots 390 is sized to accommodate the vertical transition of the saddle beam from the pouring position to the lower stripping position when the support pin 380 is removed.
  • the securing means are of particular utility when used in conjunction with the raking shore assembly 500.
  • the saddle beam 400 and the raking shore assembly 500 are no longer fixed to the shoring post 100.
  • the raking shore assembly 500 may then be free to fall away and down from the working surface 120, pulling the saddle beam 400 with it.
  • This uncontrolled movement could pose a threat to worker and bystander safety.
  • the described uncontrolled movement would be prevented by the securing means.
  • the transition pin 392 of the securing means would allow the saddle beam 400 to move vertically to the stripping position while maintaining the horizontal position of the saddle beam on the U-shaped supports 352. Accordingly, the raking shore assembly 500, connected to the saddle beam via pins 522, would also be maintained in its erect position.

Abstract

A slab depth varying system for a concrete form system is provided. The concrete form system includes a primary form at a first elevation suspended by at least one shoring post. The slab depth varying system generally comprises at least one saddle beam for supporting a flat form at a second elevation and at least one coupling means for coupling the saddle beam to the shoring post. The coupling means comprise a post connecting means for connecting the coupling means to the shoring post, and at least one beam connecting means extending from the post connecting means for connecting the coupling means to the saddle beam.

Description

Concrete Slab Depth Varying System
Field
The present invention relates to concrete slab form systems, commonly used for the floors of multi-story buildings, and more particularly to a support system of cooperating structural components that are used to support and form the variable depth portions of concrete slabs.
Background
Historically, the concrete forming industry has generally relied on form/support systems that remain in place until the concrete has attained sufficient strength to support itself and construction loads applied from above. Depending on construction codes applicable to the jurisdiction in which construction is underway, the complete forming system may be required to remain in place up to seven days.
An alternative to the above that is sometimes utilized is generally referred to as a "drop head" system. This type of system allows removal (stripping) of form components without disturbing the slab supporting components. Drop head systems invariably rely on the use of a support component (shoring posts) and a beam to receive and support the form panels. Drop head systems are disclosed in U.S. Patent No. 5,614,122 to Schworer, U.S. Patent No. 5,310,153 to Jackson and U.S. Patent No. 1 ,907,877 to Roos. However, the above references fail to address two common drop head system deficiencies.
A first deficiency with existing drop head systems is the accommodation of various slab thicknesses. It is common practice to leave the problem of changes in slab thickness up to the contractor to solve on site. This contractor typically has carpenters build single use forms in the areas affected, significantly impacting productivity, material cost, and labour cost.
A further deficiency in the prior art involves slab edges that require form to cantilever out beyond supporting walls or columns. The form must extend beyond the slab edge to be formed in order to provide workers with a place to stand when pouring the concrete. These forms challenge the form designer to provide a convenient and safe means of erecting and dismantling the forms. Existing solutions are less than satisfactory due to component complexity and the potential exposure to accidental falls experienced by workmen.
Summary
The slab depth varying system described herein provides a means to conveniently accommodate changes in concrete slab thickness. Changes in slab thickness are, for example, often required adjacent to columns. The applicant's slab depth varying system can be effectively employed in conjunction with existing concrete forming systems. Existing concrete form systems generally comprise a primary form at a first elevation suspended by shoring posts. The shoring posts generally include vertically spaced diametric openings through at least a portion of the posts. These openings are principally utilized when adjusting the height of the shoring posts.
The applicant's slab depth varying system provides saddle beams for supporting a secondary flat form at a desired second elevation below the primary form. Coupling means are provided for coupling the saddle beams to the shoring posts, which are suspending the primary form, at the second elevation. After concrete poured on the secondary form has had an opportunity to partially cure, stripping of the secondary form and the saddle beams is accommodated by a means of lowering the saddle beams from their initial height to a lower stripping height. The distance between the two heights is generally small, typically between 0.5 and 1.75 inches.
Convenient and safe erection and support of concrete forms for forming slab edges many stories above a street below is another design challenge that has not been well addressed by prior art. The form panels have to cantilever out beyond the slab or working surface below because the workers need a working area about three feet wide beyond the edge of the slab under construction. Systems in use today rely on the installation of horizontal beams that cantilever over the edge of the working surface below. Form panels are then affixed to the beams. Anchoring of the inboard end of the beams required to prohibit tipping of the beams requires use of an attachment to the existing slab that works in tension. Such an attachment is difficult to economically and reliably establish. The saddle beams used in the applicant's slab depth varying system are designed to rotate about one end, in one or two planes, into the forming position and similarly rotate in reverse when stripping. This feature readily accommodates the installation of saddle beams at slab edges through the use of raking (not vertical) shore assemblies. The saddle beam that is to be installed in a cantilevered position is hung from a shoring post, usually positioned two or more feet back from the edge of a completed slab or working surface. The raking shore, in a generally horizontal position, is then attached to the lower edge of the hanging saddle beam with a connection that permits rotation. Workmen can then rotate the saddle beam into the pouring position by simply pushing outward on the raking shore assembly without leaving the safety of the slab they are working from. The raking shore assembly is then attached to a pre-installed shoe. Safety barriers can be affixed to the raking shore assembly to protect against accidents.
Accordingly, there is described herein embodiments of the applicant's slab depth varying system.
Brief Description of the Drawings
Embodiments of the applicant's slab depth varying system will now be described by way of example and with reference to the accompanying drawings in which:
FIG. 1 shows a perspective view of one embodiment of a slab depth varying systems.
FIG. 2 shows a plan view of a coupling means of the slab depth varying system of FIG. 1.
FIG. 3 shows a side view of the coupling means of FIG. 2.
FIG. 4 shows a plan view of another coupling means of the slab depth varying system.
FIG. 5 shows a side view of the coupling means of FIG. 4.
FIG. 6 shows a side view of a saddle beam of the slab depth varying system of FIG. 1.
FIG. 7 shows a front view of the saddle beam of FIG. 6.
FIG. 8 shows a side view of a support pin of the slab depth varying system of FIG. 1. FIG. 9 shows a schematical view of one embodiment of a slab depth varying systems.
FIG. 10 shows a perspective view of a mounting shoe of the slab depth varying system of FIG. 9.
FIG. 1 1 shows a perspective view of a safety barrier adaptor of the slab depth varying system of FIG. 9.
FIG. 12 shows a plan view of another coupling means of the slab depth varying system.
FIG. 13 shows a side view of the coupling means of FIG. 12.
FIG. 14 shows a perspective view of the coupling means of FIG. 12 coupled to the saddle beam of FIG. 6.
Detailed Description
Existing concrete form systems generally comprise a primary form at a first elevation suspended by shoring posts. The shoring posts generally comprise vertically spaced diametric openings through at least a portion of the posts. These openings are principally utilized when adjusting the height of the shoring posts.
The applicant's slab depth varying system for an existing concrete form system is herein described in detail. As used herein, slab depth varying system is used to vary the depth of a slab being poured. As would be appreciated by those skilled in the art, the slab depth can be varied, for example, to accommodate concrete beams or to provide a lowered edge for the slab being poured. The slab depth varying system generally comprises saddle beams for supporting a secondary flat form at a second elevation and coupling means for coupling the saddle beams to the shoring posts of an existing concrete form system.
FIG. 1 shows an embodiment of the applicant's slab depth varying system 200 installed on an existing concrete form system 100. Coupling means 300 generally comprise post connecting means 310 for connecting the coupling means to a shoring post 110 and beam connecting means 350 extending from the post connecting means 310 for connecting the coupling means to a saddle beam 400.
The post connection means 310 of coupling means 300 are lockable to the shoring post 110 in different orientations. The orientation of the post connection means 310 determines the vertical position of the beam connecting 350 means relative to the shoring post.
With reference to FIGS. 2 and 3, the post connecting means 310 can comprise, for example, two clamp portions 312 that are hingedly coupled to each other at their adjacent ends by two fastening elements 314. It would be appreciated by one skilled in the art that the clamp portions 312 can be conveniently assembled around the shoring post 110 by, for example, hingedly coupling the two clamp portions 312 at one end with one of fastening elements 314, positioning the clamp portions adjacent one side of the shoring post 110, rotating the clamp portions around the fastening element until the uncoupled ends are adjacent on the opposite side of the shoring post, and then coupling the uncoupled ends with the other fastening element. The fastening elements 314 can be, for example, pins with apertures for receiving cotter pins.
Other means for clamping would, however, be known to those skilled in the art. For example, rather that two clamp portions 312, a single collar could be used which would be slid over the shoring post 110 prior to the attachment of a drop head. Other coupling means could include two pins rather than a hinge. The above are merely examples and those skilled in the art would appreciate that other coupling means are possible.
The clamp portions 312 have vertically spaced openings 316 therethrough. Preferably, the vertical spacing of the clamp portion openings 316 is less than the vertical spacing of the post openings 112 of shoring post 110. When the clamp portions 312 are coupled to each other, the vertically spaced openings 316 are paired in diametric opposition; there is, for example, a lower pair of openings and upper opening pair openings.
The clamp portions 312 are locked in position around the shoring post 110 by a locking pin 320 inserted through one pair of the clamp portion openings 316 and one of the post openings 112. The locking pin 320 can be, for example, a pin with an aperture for receiving a cotter pin. The clamp portions 312 are round to accommodate a round shoring post. Alternatively, the clamp portions can be square or rectangular if the shoring post is square or rectangular. At least one of the clamp portions 312 is provided with beam connecting means 350. The beam connecting means 350 can comprise, for example, U-shaped supports 352 extending from the lower half or upper half of the clamp portions' outer surface. With reference to FIG. 3, the U-shaped supports 352 extend from the lower half of the clamp portions' outer surface.
It would be appreciated by one skilled in the art that the clamp portions 312 can be locked to the shoring post 110 at a particular post opening 112 in different orientations. For example, the locking pin 320 can be inserted through the lower pair or the upper pair of vertically spaced openings 316. The clamp portions 312 can also be inverted and then locked to the shoring post. The different orientations of the clamp portions 312 can be utilized to adjust the vertical position of the U-shaped supports 352.
The U-shaped supports 352 can be fixedly attached to the clamp portions 312 as shown in FIGS. 2 and 3. As will be appreciated by those skilled in the art, the orientation of the saddle beams 400 is determined by the orientation of vertically spaced openings 316 and post openings 112. In general, the assembly of a shoring post system in which panels are affixed to a drop head will determine the orientation of post openings 112. In addition or alternatively, the U-shaped supports can be attached to the clamp portions' outer surface by vertical hinge means (not shown). The vertical hinge means allow the U-shaped supports to rotate in a generally horizontal plane around the hinge means. This rotation in a horizontal plane facilitates the attachment of saddle beams 400 to the U-shaped supports 352 and allows for flexibility in the orientation of installed saddle beams relative to the shoring posts 110.
With reference to FIGS. 4 and 5, the U-shaped supports 352 can alternatively be attached to the clamp portions' outer surface by a vertical fine adjustment means comprising, for example, vertical screws 370. The vertical screws allow for fine adjustment of the vertical position of U-shaped supports 352 relative to the clamp portions 312 and allow the U-shaped supports to rotate in a generally horizontal plane around the vertical screws 370. When the clamp portions 312 are being attached to a shoring post 110, the height of the U-shaped supports can be roughly adjusted by selecting the appropriate post opening 112 and clamp portion 312 orientation. The vertical screws 370 can then be used for fine height adjustment until the U-shaped supports are at a desired height. Another aspect of applicant's slab depth varying system 200 is the ability of the saddle beam 400 to move from a first pouring position, wherein the saddle beam supports a secondary cement form in a position for receiving poured concrete, to a second stripping position lower than the pouring position. The U-shaped supports 352 are adapted to support the saddle beam in the pouring position and the stripping position as follows.
With reference to FIGS. 6 and 7, the saddle beam 400 generally comprises at least one beam opening at one end of the beam, for example, beam openings 402. The saddle beam also comprises an L-shaped retaining flange 404 extending from the top of the saddle beam. The retaining flange is generally parallel to the axis of the beam openings 402. It would be appreciated by one skilled in the art that the saddle beam could be of various lengths.
In one embodiment, saddle beam 400 could be of various predetermined lengths based on the panel size of the panels being utilized for the main slab. Specifically, in a system in which beams are included in a slab, the main portion of the slab would be supported by panels on drop heads. If the panel size was, for example, 4 feet by 8 feet, support posts would necessarily be placed every 4 feet in one direction and every 8 feet in the other direction. In order to minimize the number of saddle beam 400 sizes required, the saddle beams could be affixed between adjacent support posts and thus, principally, be either 4 feet or 8 feet in length. In operation the support posts and panels would be erected on either side of the concrete beam, and the post connecting means 310 would be installed on the shoring posts adjacent the concrete beam at a desired height. The saddle beam 400 would be extended between the adjacent post connecting means 310 and a platform and beam sides could then be constructed utilizing a saddle beam 400 on either side of the concrete beam.
With reference to FIGS. 2 and 3, the U-shaped supports 352 comprise a base 354 and two sides 356. The sides of the U-shaped supports have an opening 358 therethrough. The gap between the two sides 356 of the U-shaped supports is sized to receive one end of the saddle beam 400.
When one end of the saddle beam 400 is received between the sides 356 of U-shaped support 352, the saddle beam can be supported in the pouring position and the stripping position. A horizontal support pin 380 removably inserted through the openings 358 in the sides 356 and beam opening 402 can support the saddle beam in the pouring position. Support pin 380 is, for example, a tampered support pin with an aperture 382 for receiving a cotter pin, best shown in FIG. 8. An upper surface 360 of sides 356 can support the retaining flange 404 of the saddle beam and thereby support the saddle beam in the stripping position. When the saddle beam 400 is in the pouring position and the support pin 380 is removed, by, for example, hammer strokes, the saddle beam falls until the retaining flange 404 catches the upper surface 360 of sides of U-shaped support 352. Thus, the saddle beam 400 transitions from the pouring position to the lower stripping position.
In another aspect, the support pin 380 can rotatably support the saddle beam in the pouring position and the saddle beam 400 comprises at least one diagonal corner cutout at an end of the saddle beam, for example, cutouts 406. The cutouts 406 allow the saddle beam to rotate a distance around the support pin, preferably at least 45 degrees. This rotation in a vertical plane allows saddle beam 400 to hang-down after attachment to coupling means 300 of the slab depth varying system 200.
With reference to FIG. 9, another aspect of applicant's slab depth varying system 200 is a raking shore assembly 500 for erecting over an open space one end of saddle beam 400 that is locked at the opposite end to shoring post 110. This assembly could be utilized, for example, when the slab thickness is increased at the edge of the slab. The raking shore assembly 500 generally comprises a telescopic member 510 with a pivotal connection 520 and a mounting shoe 530. The mounting shoe 530, as shown in FIG. 10, is pre-installed to a lower working surface 120 before erection starts. The telescopic member 510 is extended to a length suitable for positioning the saddle beam 400 horizontally; portions 512 and 514 are telescopic, with portion 514 sliding into portion 512. Portions 512 and 514 are pinned together at approximately the required length before erection commences. The telescopic member can also include a fine adjustment means (not shown), for example, an adjusting screw, for adjusting the length of the telescopic member. The telescopic member 510 includes the pivotal connection 520 at one end.
Erection of the saddle beam 400 starts with the hanging of the saddle beam on previously installed shoring post 110. The pivotal connection 520 is then attached via pins 522, as shown in FIGS. 1 and 9, to the end of the saddle beam opposite the shoring post 110. The telescopic member 510 is then used to rotate the saddle beam into position and is thereafter affixed to an affixing means 532 of mounting shoe 530. The rotation of the saddle beam can be in a vertical plane around the support pin 380. The rotation of the saddle beam can additionally be in a horizontal plane around, for example, vertical screw 370 shown in FIG. 5, so that at no time do workmen have to work beyond the edge of the working surface 120. The telescopic member 510 can be affixed to the affixing means 532 with, for example, a pin affixed through concentric holes in the telescoping member and the affixing means. FIG. 9 shows the completed installation.
In a further embodiment, rather than attach the post coupling means 310 to shoring post 110 immediately, a support pin could be placed underneath post coupling means 310, holding the post coupling means 310 in roughing its final height while allowing post coupling means 310 to freely rotate about shoring post 110. Saddle beam 400 could then be connected to post coupling means 310 as described above. The connection in this case would be done over the existing slab. The saddle beam could then be rotated into place by moving the saddle beam in the vertical plain around support pin 380 and in the horizontal plain by rotating around shoring post 110. When saddle beam 400 is in its correct orientation, locking pin 320 can then be inserted through vertically spaced openings 316 to connect post clamping means 310 to shoring post 110. In this way, a workman never needs to extend beyond the edge of the existing slab.
It is also important when dealing with open spaces to erect safety barriers in order to prevent accidents. Accordingly, the pivotal connection 520 can include an affixing means 526 for affixing a first safety barrier to the pivotal connection. A safety barrier 528 can be affixed to the affixing means 526 with, for example, a pin, the safety barrier extending above the saddle beam 400, generally perpendicular to the saddle beam.
The mounting shoe 530 can also include a plurality of affixing means 534 for affixing a second safety barrier to the mounting shoe. A safety barrier 536 can be affixed to the affixing means 534, the safety barrier extending above the lower working surface 120, generally perpendicular to the lower working surface.
With reference to FIG. 11 , the raking shore assembly 500 can also include a safety barrier adaptor 540 as a discrete component. The safety barrier adaptor 540 comprises two affixing means: first affixing means 542 for affixing the safety barrier adaptor to the saddle beam 400 and a plurality of second affixing means 544 for affixing a safety barrier to the safety barrier adaptor 540. The safety barrier adaptor is designed to be affixed to the saddle beam 400 concurrently with the pivotal connection 520.
With reference to FIGS. 12 to 14, another aspect of the applicant's slab depth varying system 200 is a securing means for preventing horizontal movement of the saddle beam 400, generally along its axis away from the shoring post 100, that can accommodate the vertical transition of the saddle beam from the pouring position to the stripping position. The securing means can comprise, for example, aligned vertical slots 390 through the sides 356 of one of the U-shaped supports 352 and a transition pin 392.
With reference to FIG. 14, the transition pin 392 can be removably inserted through the slots 390 and a secondary beam opening 408 (best seen in FIG. 6) in saddle beam 400. The transition pin 392 can be secured in the inserted position by, for example, one or more cotter pins. The slots 390 are sized to prevent horizontal moment of the transition pin 392 perpendicular to the pin's axis and, at the same time, allow the transition pin to move vertically between the upper and lower ends of the slots.
As will be appreciated by those skilled in the art, the transition pin 392 inserted through the slots 390 and the secondary beam opening 408 of saddle beam 400 prevents horizontal movement of the saddle beam along its axis while allowing vertical movement of the saddle beam corresponding to the transition pin's own range of vertical movement. The length of the slots 390 is sized to accommodate the vertical transition of the saddle beam from the pouring position to the lower stripping position when the support pin 380 is removed.
The securing means are of particular utility when used in conjunction with the raking shore assembly 500. With reference to FIG. 9, once the support pin 380 has been removed for moving the saddle beam 400 from the pouring position to the stripping position, the saddle beam 400 and the raking shore assembly 500 are no longer fixed to the shoring post 100. The raking shore assembly 500 may then be free to fall away and down from the working surface 120, pulling the saddle beam 400 with it. This uncontrolled movement could pose a threat to worker and bystander safety. As will be appreciated by those skilled in the art, the described uncontrolled movement would be prevented by the securing means. The transition pin 392 of the securing means would allow the saddle beam 400 to move vertically to the stripping position while maintaining the horizontal position of the saddle beam on the U-shaped supports 352. Accordingly, the raking shore assembly 500, connected to the saddle beam via pins 522, would also be maintained in its erect position.
All of the above features provide an illustration of preferred embodiments of the applicant's slab depth varying system, but are not intended to limit the scope of the invention, which is fully described in the claims below.

Claims

CLAIMS:
1. A slab depth varying system for a concrete form system, said concrete form system including a primary form at a first elevation suspended by at least one shoring post, said slab depth varying system comprising: at least one saddle beam for supporting a flat form at a second elevation; at least one coupling means for coupling said saddle beam to the shoring post, said coupling means comprising: post connecting means for connecting said coupling means to said shoring post, and at least one beam connecting means extending from said post connecting means for connecting said coupling means to said saddle beam.
2. The slab depth varying system of claim 1 wherein the post connecting means are connectable to said shoring post in different orientations, the orientation of the post connecting means determining the vertical position of said beam connecting means relative to the shoring post.
3. The slab depth varying system of claim 2 wherein said post connecting means comprise: two clamp portions that are hingedly coupled to each other at their adjacent ends by fastening elements, said clamp portions for assembling around the shoring post, at least one clamp portion being provided with said beam connecting means extending from said clamp portion's outer surface.
4. The slab depth varying system of claim 3 wherein the shoring post comprises vertically spaced diametric openings therethrough; wherein said clamp portions that are hingedly coupled to each other comprise at least two pairs of vertically spaced diametrically opposed openings, the vertical spacing of said clamp portion openings being less that the vertical spacing of the post openings; wherein said clamp portions are locked in position around the shoring post by a locking pin inserted through a pair of said clamp portion openings and one of the post openings.
5. The slab depth varying system of claim 4 wherein said beam connecting means extend from the lower half or upper half of said clamp portion's outer surface.
6. The slab depth varying system of claim 5 wherein said beam connecting means are attached to said clamp portion's outer surface by a vertical hinge means, said hinge adapted to allow said beam connecting means to rotate in a generally horizontal plane around said hinge means.
7. The slab depth varying system of claim 5 wherein said beam connecting means are attached to said clamp portion's outer surface by a vertical fine adjustment means, said fine adjustment means adapted to allow fine adjustment of the vertical position of said beam connecting means relative to said clamp portions.
8. The slab depth varying system of claim 7 wherein said fine adjustment means comprise a vertical screw.
9. The slab depth varying system of claim 1 wherein said beam connecting means are adapted to support said saddle beam in a pouring position and a stripping position lower than said pouring position, said saddle beam being movable from said pouring position to said stripping position.
10. The slab depth varying system of claim 9 wherein said saddle beam comprises: at least one beam opening therethrough at one end of said saddle beam; and a longitudinal L-shaped retaining flange extending from the top of said saddle beam, said retaining flange generally parallel to said beam opening; wherein said beam connecting means comprise a U-shaped support with a base and two sides, said sides having an opening therethrough, said U-shaped support adapted to receive one end of said saddle beam between said sides; wherein one end of said saddle beam received between said sides is supported in said pouring position by a horizontal support pin removably inserted through said side openings and said beam opening; wherein an upper surface of said sides is adapted to support said retaining flange of said saddle beam thereby supporting said saddle beam in said stripping position; and wherein said saddle beam is adapted to move from said pouring position to said stripping position when said support pin is removed.
1 1. The slab depth varying system of claim 10 wherein said support pin rotatably supports said saddle beam is said pouring position; and wherein said saddle beam comprises at least one diagonal corner cutout at an end of said saddle beam, said cutout adapted to allow said saddle beam to rotate a distance around said support pin.
12. The slab depth varying system of claim 11 wherein said rotation distance is at least 45 degrees.
13. The slab depth varying system of any one of claims 10 to 12 wherein said beam connecting means comprise a securing means for preventing horizontal movement of said saddle beam along its axis.
14. The slab depth varying system of claim 13 wherein said securing means comprise aligned vertical slots through said sides of said U-shaped support and a transition pin; wherein said saddle beam comprises at least one transition pin opening therethrough for receiving said transition pin; and wherein horizontal movement of said saddle beam along its axis is prevented by said transition pin removably inserted through said vertical slots and said transition pin opening in said saddle beam.
15. The slab depth varying system of any one of claims 1 to 14 further comprising a raking shore assembly for positioning over an open space one end of said saddle beam that is connected at the opposite end to the shoring post, said raking shore assembly comprising: a telescopic member for rotating and holding said end of said saddle beam into position, said telescopic member adapted to extend to a length suitable for positioning said saddle beam horizontally; a mounting shoe affixed to a lower working surface; an affixing means for affixing said telescopic member to said mounting shoe; and a pivotal connection for connecting said telescopic member to said saddle beam; wherein said telescopic member is adapted to rotate said saddle beam into position and thereafter be affixed to said mounting shoe.
16. The slab depth varying system of claim 15 wherein said affixing means is a pin affixed through concentric holes in said telescoping member and said mounting shoe.
17. The slab depth varying system of claim 15 wherein said telescopic member comprises a fine adjustment means for adjusting the length of said telescopic member.
18. The slab depth varying system of claim 15 wherein said pivotal connection comprises a first affixing means for affixing a first safety barrier.
19. The slab depth varying system of claim 18 wherein said pivotal connection comprises a first safety barrier, said first safety barrier being affixed to said first affixing means.
20. The slab depth varying system of claim 15 wherein said mounting shoe comprises at least one second affixing means for affixing a second safety barrier.
21. The slab depth varying system of claim 20 wherein said mounting shoe comprises a second safety barrier, said second safety barrier being affixed to said second affixing means.
22. The slab depth varying system of claim 15 wherein said raking shore assembly further comprises a safety barrier adaptor, said safety barrier adaptor comprising: a first affixing means for affixing said safety barrier adaptor to said saddle beam; at least one second affixing means for affixing a safety barrier; wherein said safety barrier adaptor is adapted to be affixed to said saddle beam concurrently with said pivotal connection.
PCT/CA2008/001313 2007-07-19 2008-07-18 Concrete slab depth varying system WO2009009898A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CA2,594,047 2007-07-19
CA 2594047 CA2594047A1 (en) 2007-07-19 2007-07-19 Concrete slab depth varying system
CA 2599534 CA2599534A1 (en) 2007-07-19 2007-08-30 Concrete slab depth varying system
CA2,599,534 2007-08-30

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WO2009009898A1 true WO2009009898A1 (en) 2009-01-22

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CN103408800A (en) * 2013-07-03 2013-11-27 青阳县恒源化工原料有限责任公司 High-dispersivity modified calcium carbonate for color masterbatches and preparation method thereof
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US20190194961A1 (en) * 2017-12-22 2019-06-27 Bond Formwork Systems, LLC Pass-Through Head Assembly for a Grid Shoring System
US10982452B1 (en) 2020-07-31 2021-04-20 Bond Formwork Systems, LLC Secondary joist profile for grid systems
US11047142B1 (en) 2020-07-31 2021-06-29 Bond Formwork Systems, LLC Main beam structure and profile for formwork grid systems
US11268289B2 (en) 2020-07-31 2022-03-08 Bond Formwork Systems, LLC Drophead nut for formwork grid systems

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Cited By (14)

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Publication number Priority date Publication date Assignee Title
CN103408802A (en) * 2013-07-03 2013-11-27 青阳县永诚钙业有限责任公司 Modified calcium carbonate for artificial marble and preparation method thereof
CN103408800A (en) * 2013-07-03 2013-11-27 青阳县恒源化工原料有限责任公司 High-dispersivity modified calcium carbonate for color masterbatches and preparation method thereof
CN103408801A (en) * 2013-07-03 2013-11-27 青阳县永诚钙业有限责任公司 Modified calcium carbonate for wear-resistant rubber shoe soles and preparation method thereof
WO2015028691A1 (en) * 2013-08-27 2015-03-05 Inveral, S.A. Support crossbeam for a work platform
ES2530315R1 (en) * 2013-08-27 2015-04-09 Inveral, S.A. Support crossbar of a work platform.
JP2015214819A (en) * 2014-05-09 2015-12-03 株式会社恒栄 Concrete slab construction tool
US10024069B2 (en) 2014-09-02 2018-07-17 Concrete Support Systems Construction prop assembly
US20190194961A1 (en) * 2017-12-22 2019-06-27 Bond Formwork Systems, LLC Pass-Through Head Assembly for a Grid Shoring System
US10711472B2 (en) * 2017-12-22 2020-07-14 Bond Formwork Systems, LLC Pass-through head assembly for a grid shoring system
US10982452B1 (en) 2020-07-31 2021-04-20 Bond Formwork Systems, LLC Secondary joist profile for grid systems
US11047142B1 (en) 2020-07-31 2021-06-29 Bond Formwork Systems, LLC Main beam structure and profile for formwork grid systems
US11268289B2 (en) 2020-07-31 2022-03-08 Bond Formwork Systems, LLC Drophead nut for formwork grid systems
US11473321B2 (en) 2020-07-31 2022-10-18 Bond Formwork Systems, LLC Main beam structure and profile for formwork grid systems
US11585105B2 (en) 2020-07-31 2023-02-21 Bond Formwork Systems, LLC Secondary joist profile for grid systems

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