Abstract:
A method and apparatus for forming a formwork for a ribbed or waffle concrete slab is provided. The apparatus includes a rectangular block having a ledge around the base, the ledge having a dimension of half the desired width of the base ribs of the concrete slab, and a keystone connector. The keystone connector has an engagement portion configured to attach to an engagement portion on each block. In a method, the blocks are laid out so that the ledges of adjacent blocks are in contact. A keystone connector is then placed at each intersection of four blocks by attaching the respective engagement portions of the keystone connector and each block so that the keystone connector holds each of the four blocks in place relative to one another. The keystone connector is also configured to retain a reinforcing rod laid in the channel between adjacent blocks.
Abstract:
A method and apparatus for forming a formwork for a ribbed or waffle concrete slab is provided. The apparatus includes a rectangular block having a ledge around the base, the ledge having a dimension of half the desired width of the base ribs of the concrete slab, and a keystone connector. The keystone connector has an engagement portion configured to attach to an engagement portion on each block. In a method, the blocks are laid out so that the ledges of adjacent blocks are in contact. A keystone connector is then placed at each intersection of four blocks by attaching the respective engagement portions of the keystone connector and each block so that the keystone connector holds each of the four blocks in place relative to one another. The keystone connector is also configured to retain a reinforcing rod laid in the channel between adjacent blocks.
Abstract:
A concrete slab and beam forming system including first and second shoring towers that are adjustable in height and which can be adjusted to provide for concrete beams of different depths. The forming system also includes a first plank with an integral facing, and second and third planks having integral facings which are pivotally attached at opposite ends of the first plank and which rest upon adjacent shoring towers in a first position in which the facings of all the planks are substantially coplanar. The planks are provided with bolts for releasably securing the second and third planks in that first position and operable to allow the second and third planks to be pivoted to a second position in which the facings of the second and third planks are substantially perpendicular to the facing of the first plank. One component of the slab and beam forming system is the slab form, another component is the shoring tower, and a method is provided for constructing a concrete slab supported by a beam using the components of the forming system.
Abstract:
A form pan section comprising a top wall and opposed side walls depending from a respective opposed side of the top wall. A support flange is provided along a free edge of each of the side walls. The support flange has a load supporting bearing section. Means is provided in each of the support flanges to secure the flange to supporting framework. Connection means is provided inwardly of the top wall and side walls to interconnect the pan section to another pan section. A form pan is constructed of at least two end pan sections having the above-described characteristics.
Abstract:
An arrangement for encasing ceilings with trusses in which a framework of four telescopic supports and strengthened by struts, holds casing beams having two sides on which telescopic ceiling casing carriers are located. The framework provides for supporting the casing for the trusses, and at least two trusses are placed a distance apart and adjacent from each other. Between the casing beams and the supports, beam support carriers are telescoped on both ends and combined into a fixed-angle frame detachably and tension-proof connected to the supports. The support carriers, furthermore, support abutments bridging a space between the casing tables for the truss casing carriers. Four intermediate supports are detachably fastened to the beam support carriers, and the casing beams which support the ceiling casing carriers and which are combined with the ceiling casing carriers into a rigid-angle frame, are fastened to the four intermediate supports. Beam support carriers are made of rectangular pipes with four detachable inserts, and are fixed in relation to the beam support carriers while being movable. The abutments are movable, moreover, in infinitely variable steps on the beam support carriers for lateral beam casings. The intermediate supports are fastened to the beam support carriers with infinitely variable height adjustment. The intermediate supports are detachably connected to the casing beams.
Abstract:
A concrete form which is particularly suited for casting-in-place concrete structures, such as a building, comprises a plurality of metallic form members that are interconnected so as to define a planar form surface having a plurality of spaced, parallel elongated depressions extending across the entire length of the form. The resulting concrete structure is generally planar having a relatively thin planar surface which is reinforced by unitary, spaced, parallel beams formed by said depressions. The resulting structure is of comparable strength to a thicker slab of concrete, requires less concrete, and provides spacing in-between the parallel beams for the ducting of utility lines. In a modification, the depressions may also include frangible mandrels which may be readily punched out of the concrete structure to enable the ducting of utility lines transverse to the beams of concrete.
Abstract:
Concrete slab structures with depending beams are formed by casting concrete in a falsework structure comprising a plurality of transversely spaced longitudinal form members of inverted Ushape having downwardly extending flanges, the flange of one form member being spaced from the flange of the adjacent form member to define the lateral sides of a depending beam of the slab. The flanges of the form members are resilient and relatively thin and are subject to deformation by the introduction of concrete between the flanges. A ridid brace or support member rests on props and is intended to engage the flanges of adjacent form members and form a closure at the bottom thereof while also reinforcing the flanges. The support member is of U-shape and may be an extruded aluminum member, and the support member has upstanding side walls which extend along a considerable part of the height of the flanges of the form members such that upon introduction of the concrete between the flanges of the form members they will be pressed into uniform, intimate contact with the flanges and prevent lateral deformation of the flanges over the entire height thereof whereby the flanges are constrained to remain substantially straight.
Abstract:
A portable form for casting in place suspended slatted monolithic-type floor panels or sections of uniform size for animal pens. This same inventive concept may be used to precast monolithic slatted floor panels at a spot near or at the erection site.