Claims
- 1. A formwork structure for casting a concrete floor provided with a floor joist,
- said structure comprising generally horizontal floor form means for supporting and casting the concrete floor,
- a pair of side form elements for casting the sides of the floor joist,
- each of said side form elements having frame members and side sheathing fastened to said frame members,
- a bottom form for extending between said side form elements to cast the bottom of the floor joist,
- and releasable fastening means extending between said side form elements for interconnecting said side form elements with said bottom form secured therebetween,
- said fastening means being releasable for stripping the side form elements and the bottom form from the cast concrete floor joist,
- said floor form means having a pair of upwardly facing hook shaped hanger means for pivotally suspending said side form elements,
- said side form elements having respective upper portions with respective downwardly facing hook shaped hanger means thereon for disengageably and pivotally resting upon the respective upwardly facing hook shaped hanger means,
- said upwardly and downwardly facing hook shaped hanger means defining a pair of pivot axes about which said side form elements are swingably and disengageably suspended for easy stripping from the cast floor joist by swinging movement and removal of said side form elements from said upwardly facing hook shaped hanger means.
- 2. A formwork structure according to claim 1, in which
- said upper portion of each of said side form elements comprises a laterally projecting generally horizontal flank projection forming an extension of said floor form means,
- said downwardly facing hook shaped hanger means being provided on said flank projection for removably engaging the corresponding upwardly facing hook shaped hanger means on said floor form means.
- 3. A formwork structure according to claim 2, in which each of said flank projections has a lateral extremity which is remote from the sheathing of the corresponding side form element,
- said downwardly facing hook shaped hanger means being in the direct neighborhood of said extremity.
- 4. A formwork structure according to claim 2,
- said flank projection having upwardly facing sheathing thereon,
- said downwardly facing hook shaped hanger means being in the direct neighborhood of said sheathing on said flank projection.
- 5. The formwork structure according to claim 1,
- said floor form means having upwardly facing sheathing thereon,
- said upwardly facing hook shaped hanger means being spaced downwardly from said sheathing on said floor form means.
- 6. A formwork structure according to claim 2,
- said flank projection of each of said side form elements having upwardly facing sheathing thereon,
- said flank projection having a lateral extremity remote from the side sheathing of the corresponding side form element,
- said downwardly facing hook shaped hanger means being spaced downwardly from said sheathing on said flank projection and in the neighborhood of said extremity.
- 7. A formwork structure according to claim 2,
- the flank projection of each of said form elements having upwardly facing generally horizontal sheathing thereon,
- each of said side form elements having a transitional portion extending between the horizontal sheathing on said flank projection and the side sheathing,
- said transitional portion comprising a sloping face between said side sheathing and said horizontal sheathing.
- 8. A formwork structure according to claim 1,
- said floor form means including a pair of girders,
- said upwardly facing hook shaped hanger means being provided on said girders.
- 9. A formwork structure according to claim 2,
- said flank projection of each of said side form elements having downwardly facing surface means for engaging the upper side of said floor form means after dismantling movement of said floor form means downwardly away from the cast concrete floor and laterally away from the floor joist,
- each of said side form elements being removable from the floor form means by swinging the side form element away from the floor joist and withdrawing the flank projection from the space between the floor joist and the floor form means.
- 10. A formwork structure according to claim 1,
- including cooperative stop means on said floor form means and said side form elements for limiting the swinging movement of the side form elements toward their positions of use to cast the sides of the floor joist.
- 11. A formwork structure according to claim 10,
- said stop means comprising cooperatively engageable side surfaces on said floor form means and said side form elements.
- 12. A formwork structure according to claim 1,
- said floor form means including floor girders having upwardly facing sheathing thereon,
- said upwardly facing hook shaped hanger means comprising upwardly open hooks on said floor girders and spaced downwardly from the sheathing thereon.
- 13. A formwork structure according to claim 2,
- said upwardly facing hook shaped hanger means comprising upwardly open hooks on said floor form means,
- said downwardly facing hook shaped hanger means comprising bars projecting downwardly from said flank projections for pivotal engagement with said hooks.
- 14. A formwork structure according to claim 13,
- including crossbars extending between said bars and the frame members of the side form elements,
- said crossbars having downwardly facing recesses for receiving the hooks.
- 15. A formwork structure according to claim 14,
- said crossbars having second downwardly facing recesses formed therein adjacent said first mentioned recesses,
- said second recesses being less deep than said first mentioned recesses.
- 16. A formwork structure according to claim 1,
- said bottom form being longer than said side form elements.
- 17. A formwork structure according to claim 1,
- said side sheathing on said side form elements having bearing strips thereon to support said bottom form.
- 18. A formwork structure according to claim 1, comprising
- floor joist clamps for mounting on lower portions of said side form elements to prevent spreading of said side form elements,
- said clamps comprising yokes having means for adjusting the effective length of said yokes,
- said yokes being movable upwardly from below into their positions of mounting on said side form elements.
- 19. A formwork structure according to claim 18,
- each of said yokes comprising telescopically slidable sections and means for locking said sections together.
- 20. A formwork structure according to claim 18,
- each of said yokes comprising a yoke rod and two sections slidable and lockable thereon.
- 21. A formwork structure according to claim 20,
- each of said yokes comprising a tie rod extending along the axis of the yoke for locking said sections of the yoke.
- 22. A formwork structure according to claim 18,
- in which each of said yokes comprises a short section and a longer section,
- said short section being slidably disposed in an overlapping relationship to said longer section,
- said short section having a stirrup thereon opposite a portion of said longer section,
- and a wedge received in said stirrup for acting upon the longer yoke section to lock said sections together.
- 23. A formwork structure according to claim 18,
- said bottom form being disposed between said side form elements and being clamped therebetween by said clamp.
- 24. A formwork structure according to claim 18,
- said frame members of said side form elements comprising extensions extending downwardly past the lower ends of the side sheathing.
- 25. A formwork section according to claim 19,
- each of said side form elements comprising a plurality of vertically spaced teeth for selecting the elevation of the bottom form.
- 26. A formwork structure according to claim 25,
- in which said telescopically slidable sections of the yoke have bars on said sections extending transversely thereto and receivable between said teeth in engagement therewith.
- 27. A formwork structure according to claim 25,
- in which said teeth are provided on said frame members of said side form elements.
- 28. A formwork structure according to claim 24,
- in which said yokes of said clamps are applied to said extensions of said frame members.
- 29. A formwork structure according to claim 19,
- in which said sections of said clamp comprise upwardly projecting stop means extending at a fixed angle to the longitudinal axis of the yoke and engageable with said side form elements for clamping said side form elements between said stop means with the sheathing of said side form elements at the desired angle to the bottom form.
- 30. A formwork structure according to claim 29,
- said stop means comprising bars extending transversely to the longitudinal axis of said yoke.
- 31. A formwork structure according to claim 29,
- said stop means comprising two stops on each of said telescopically slidable sections for engaging the corresponding side form element at different levels.
- 32. A formwork structure according to claim 31,
- in which one of said two stops is engageable with the corresponding side form element above the upper side of the bottom form,
- the other stop being engageable with the corresponding side form element below the upper side of the bottom form.
- 33. A formwork structure according to claim 26,
- in which each of said tooth engaging bars is connected between an adjacent pair of said clamps.
- 34. A formwork structure according to claim 29,
- said stop means comprising a bar connected between corresponding sections of two adjacent clamps,
- said bar being spaced above the yokes of said adjacent clamps and extending transversely to the longitudinal axes of said last mentioned yokes.
- 35. A formwork structure according to claim 18,
- said bottom form being supported by the yokes of said clamps.
- 36. A formwork structure according to claim 26,
- said frame members of said side form elements including vertical members on which said teeth are provided,
- each of said vertical members including a lower extremity having a shoe member projecting laterally beyond the length of said teeth.
- 37. A formwork structure according to claim 1,
- said releasable fastening means comprising bottom supporting members extending between and abutting against the two side form elements,
- said releasable fastening means including releasable fastening elements connected between the ends of the bottom supporting members and the abutting side form elements,
- said releasable fastening elements being readily releasable for stripping said side form elements away from the cast concrete floor joist.
- 38. A formwork structure according to claim 37,
- said side form elements and said bottom supporting members being provided with holes for receiving said releasable fastening elements,
- said holes extending through the frame members and the sheathing of said side form elements.
- 39. A formwork structure according to claim 38,
- said holes being arranged in generally vertical rows to provide for adjustment of the elevation of said bottom supporting members,
- said side sheathing on said side form elements extending down to an elevation corresponding generally to the upper extremities of said bottom supporting members when adjusted to their lowermost elevation.
- 40. A formwork structure according to claim 38,
- said holes in said side form elements and said bottom supporting members being arranged in generally vertical rows to provide for adjustment of the elevation of said bottom supporting members,
- said holes in said bottom supporting members being spaced apart by a distance which is different from the spacing distance between said holes in said side form elements to provide for fine adjustment of the elevation of said bottom supporting members.
- 41. A formwork structure according to claim 37,
- each of said bottom supporting members comprising two adjustable overlapping plates for adjusting the length of said bottom supporting members,
- said plates having generally horizontal rows of holes therein with fasteners extending through some of said holes,
- said holes in the generally horizontal rows in the two plates having different spacing distances to provide for fine adjustment of the length of said bottom supporting members.
- 42. A formwork structure for casting a concrete floor to be provided with an integral downwardly projecting floor joist,
- said structure comprising a pair of generally horizontal floor forms for supporting and casting the concrete floor,
- said floor forms having a space therebetween where the floor joist is to be provided,
- a pair of left and right hand side form elements removably receivable in said space for casting the sides of the floor joist,
- each of said side form elements having frame members and generally vertical sheathing fastened to said frame members,
- a generally horizontal bottom form for extending between said side form elements to cast the bottom of the floor joist,
- said bottom form being disposed at an elevation lower than the elevation of said floor form,
- and releasable fastening means extending between said side form elements for interconnecting said side form elements with said bottom form secured therebetween,
- said fastening means being releasable for stripping the side form elements and the bottom form from the cast concrete floor joist,
- said floor forms having girders with generally horizontal sheathing fastened thereon,
- said girders being adjacent opposite sides of said space between said floor forms,
- said girders on said floor forms having a pair of upwardly facing hook-shaped hanger means thereon for pivotally suspending said side form elements,
- each of said side form elements having a cross-sectional shape corresponding generally to an inverted L,
- each of said side form elements having an upper portion comprising a laterally and outwardly projecting generally horizontal flank projection having generally horizontal sheathing thereon at substantially the same level as the horizontal sheathing of said floor forms,
- said flank projections extending in left and right hand directions on said respective left and right hand side form elements,
- said flank projections of said side form elements having downwardly facing hook-shaped hanger means thereon for disengageably and pivotally resting upon the respective upwardly facing hook-shaped hanger means on said floor forms,
- said upwardly and downwardly facing hook-shaped hanger means defining a pair of pivot axes about which said side form elements are swingably and disengageably suspended for easy stripping from the cast floor joist by swinging movement and removal of the side form elements from the upwardly facing hook-shaped hanger means.
- 43. A formwork structure according to claim 42,
- each of said side form elements having a transitional portion extending between the horizontal sheathing on said flank projection and the side sheathing,
- said transitional portion comprising a sloping face between said side sheathing and said horizontal sheathing,
- said transitional portion facilitating the stripping of said side form elements from the cast floor joist by downward swinging movement of said side form elements about said pivot axes.
- 44. A formwork structure for casting a concrete floor to be provided with an integral downwardly projecting floor joist,
- said structure comprising a pair of generally horizontal floor forms for supporting and casting the concrete floor,
- said floor forms having a space therebetween where the floor joist is to be provided,
- a pair of left and right hand side form elements removably receivable in said space for casting the sides of the floor joist,
- each of said side form elements having frame members and generally vertical sheathing fastened to said frame members,
- a generally horizontal bottom form for extending between said side form elements to cast the bottom of the floor joist,
- said bottom form being disposed at an elevation lower than the elevation of said floor form,
- and releasable fastening means extending between said side form elements for interconnecting said side form elements with said bottom form secured therebetween,
- said fastening means being releasable for stripping the side form elements and the bottom form from the cast concrete floor joist,
- said floor forms having girders with generally horizontal sheathing fastened thereon,
- said girders being adjacent opposite sides of said space between said floor forms,
- said girders on said floor forms having a pair of upwardly facing hook-spaced hanger means thereon for pivotally suspending said side form elements,
- each of said side form elements having a cross-sectional shape corresponding generally to an inverted L,
- each of said side form elements having an upper portion comprising a laterally and outwardly projecting generally horizontal flank projection having generally horizontal sheathing thereon at substantially the same level as the horizontal sheathing of said floor forms,
- said flank projections extending in left and right hand directions on said respective left and right hand side form elements,
- said flank projections of said side form elements having downwardly facing hook-spaced hanger means thereon for disengageably and pivotally resting upon the respective upwardly facing hook-shaped hanger means on said floor forms,
- said upwardly and downwardly facing hook-shaped hanger means defining a pair of pivot axes about which said side form elements are swingably and disengageably suspended for easy stripping from the cast floor joist by swinging movement and removal of the side form elements from the upwardly facing hook-shaped hanger means,
- said upwardly facing hook-shaped hanger means comprising upwardly open hooks on said girders of said floor forms,
- said downwardly facing hook-shaped hanger means comprising bars projecting downwardly from said flank projections for pivotal engagement with said hooks.
- 45. A formwork structure according to claim 44,
- each of said side form elements having a transitional portion extending between the generally vertical side sheathing and the generally horizontal sheathing on said flank projection,
- said transitional portion comprising a sloping face between said side sheathing and said horizontal sheathing to facilitate stripping of the side form elements from the cast floor joist by downward swinging movement of said side form elements about said pivot axes.
Priority Claims (2)
Number |
Date |
Country |
Kind |
3038348 |
Oct 1980 |
DEX |
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3140142 |
Oct 1981 |
DEX |
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RELATED APPLICATION
This application is a continuation in part of application Ser. No. 307,952, filed Oct. 2, 1981, and now abandoned.
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Vaughn |
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Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
307952 |
Oct 1981 |
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