Abstract: Apparatus for casting poured concrete liners in manholes or the like wherein a collection of sheet-metal, flanged, arcuate panels is provided which panels can be assembled in belts of generally circular cross-section commencing from the bottom of the manhole to provide a complete form structure for casting a concrete liner with a minimum thickness of about three inches and including openings created by sectional cylindrical inserts, all of which can be assembled, then disassembled after the concrete liner has set. An extensive variety of panels to accommodate different shapes of manholes includes panels for forming right conical belts, for forming offset conical belts, and for forming wedge-shaped belts to make transitions between vertical and tilted sections of the manhole.

Abstract: The invention relates to means and method of making a multiple castable structural panel in a single pouring operation. A mold-envelope constructed from a plurality of pieces is provided. The mold-envelope is constructed without any external fastening means. The poured core holds the pieces of the mold-envelope together.

Abstract: A generally triangular hook-on scaffolding support is formed by the alignment of a horizontal elongated top member over an angled brace and a vertical brace. A short section of serrated angle iron affixed transversely to one end of the top member abuts to inside surfaces of an opened stud wall and in conjunction with a wedge bracket and wedge board provides a strong pressure fitting for securing the scaffold in a stable position outside or by reverse attachment inside a building under construction. Another short angle iron section affixed to the distal end of the angled brace is adapted as a brace foot to engage the lengthwise edge of a horizontal board, either the bottom sole plate of the wall frame or a board nailed between studs, to provide base support for the scaffold. The scaffold can therefore be positioned at any height along the opened framed wall without the use of ground level support, nailing the hook-on scaffolding support to the framed wall, or assemblage of accessory parts.

Abstract: A shuttering used for forming concrete comprises a plate with a plurality of through holes opening on both its face and reverse, and a double woven fabric consisting of a face tissue which permits passage of water but prevents concrete from passing and a reverse tissue opposed to the face of the plate and relatively displaceable with respect to the face of the plate; the surplus water oozing out of placed concrete flows through gaps formed by the reverse tissue between said plate and the face tissue as well as the through holes of said plate.

Abstract: A molding device includes at least two comonent form boards 12,13 and a wedge-shaped spacer board 14 between them. An operating mechanism is associated with the form boards and the spacer, and moves them relative to one another. The operating mechanism includes at least one rack member 18, and at least one lever 26 connected with a pawl which swings about an axis eccentric with the axis of the lever. The pawl 28 engages with the rack and moves the rack forward when the lever is operated.

Abstract: A panel for a concrete forming structure including two siderails and two end rails extending between and connecting the ends of the siderails. A corrugated, aluminum core member is located inside the area formed by the rails and substantially covers the interior space of the panel. An outer structural sheet extends between the two sets of rails and has the core member connected thereto. An inner plywood sheet extends between the two sets of rails and is attached thereto. The core member is also connected to the plywood sheet. Rigid insulating material fills the inner and outer troughs formed by the corrugated member. A tubular connecting member is provided to connect the afore-mentioned panel to an adjacent panel. It has two connecting flanges extending outwardly from one side and bolt receiving slots formed in each of these flanges. The tubular member has aligned holes therein for passage of a tie rod and special projections that form a channel to receive flanges provided on the edges of the panels.

Abstract: A flexible surface plywood concrete form liner is disclosed which includes a flat planar sheet of relatively thick plywood material which has been precisely sized and squared. The prepared plywood sheet material is coated with a layer of relatively thin, flexible elastomeric material cast as a one-piece layer over the entire surface of one side of the plywood sheet material as well as all four edges. In this way, the elastomeric material is a continuous integral coating bonded directly to the surfaces of the plywood to prevent the penetration of moisture or chemicals from the concrete into the laminations of the plywood during use. A textured negative impression can be provided on the outer surface of the elastomeric material to leave a textured surface in the finished concrete. A novel edge seal which can be slightly angled is formed along the edges of the liner so that the joint between the liners is reinforced to strengthen and prevent blow-out of the concrete at the liner joints.

Abstract: Concrete forms comprising a first cloth sheet permitting surplus water and air contained in concrete cast in the form to pass therethrough but capable of blocking the passage of the concrete, a second cloth sheet permeably secured to the first sheet, permitting the surplus water and air to pass between and through the first and second sheets and to be absorbed into the second sheet as well as the first sheet, and a support plate to which the second sheet is bonded as by adhesive or thermal bonding acting through only part of the thickness of the second sheet, leaving as water and air permeable throughout the remainder of the second sheet, all of the first sheet, and the interspace therebetween, such being effective as flow paths for surplus water and air to exhaust from the concrete cast in the form to thereby shorten the cure time and improve the strength of the concrete when cured.

Abstract: Webs for reducing bending in board-shaped construction elements when in use have their main direction of load perpendicular to the board plane. The devices have a sandwich of at least one first material layer, one second material layer, and one third material layer. The third material layer lies between the other two material layers and has a substantially higher coefficient of heat expansion than the other two material layers, so as to set up contracting biasing forces in the third material layer. The third material is made of a sheet metal strip. The two other materials are made of thermosetting plastic, which sets at a temperature considerably above the working temperature of the construction element.

Abstract: A form for forming concrete comprises a first sheet permitting surplus water contained in the concrete cast in the form to pass through the first sheet, but capable of blocking the passage of the concrete, a second sheet secured to the first sheet, permitting the surplus water to be absorbed into it, and a plate secured to the second sheet. The first sheet provides paths for the surplus water by the existence of the second sheet. The paths for the surplus water are ensured by a spacer provided between the first sheet and the plate in lieu of the second sheet or together with the second sheet.

Abstract: Formwork (15) for moulding walls of reservoirs in any desired curved configuration. The formwork utilizes a flexible panel (18) having a form surface (17) on one side against which the reservoir wall may be moulded and connector means (37) on the other side for connecting adjustable bracing (36) thereto for holding the formwork in position. The bracing may be adjusted to vary the curvature of the formwork.

Abstract: A rigid, light-weight, thermoplastic bubble insulation form for cast in situ concrete slabs includes hemispherical void spaces for reduction of concrete volume and thermal insulation characteristics. An upper hemispheric surface provides an integral seating arrangement for wire mesh reinforcement. An under-surface of the form includes spacer nodules for facilitating drainage. The bubble relief form is water impervious for controlling curing of the concrete and further is supplied in modular units adapted for trimming and overlapping spliced connections.

Abstract: A modular panel which may be combined with others to constitute a mold for depositing concrete or the like is disclosed. Each modular panel is corrugated to have ridges and troughs which extend parallel to and alternating with each other. At least the troughs are provided with openings in the form of elongate slots with or without circular holes combined therewith such that the openings define nailing passages in alignment with those of another modular panel which is joined with that panel, with no regard to the relative position of the joined panels. An elastic transparent strip is adhered to the bottom of each trough to cover the openings while allowing nails to be driven therethrough.

Abstract: A falsework for concrete structures is formed by providing tubular elements at longitudinal edges of metal planks and corner units and providing slots in these tubular elements such that hooks engaged in these slots can brace metal plates against two adjoining such elements while the metal plates are supported by bars welded to the elements below the slots.

Abstract: The metal form has a flexible panel member with a perimetral flange projected laterally from one side thereof. Each of a pair of transversely opposite side sections of the flange is segmented by a plurality of longitudinally spaced V-shaped notches having their apices adjacent the one side of the panel member to provide for a lateral flexing movement of the panel member to a preselected shape. With the panel member in the predetermined shape, the segments in each of the flange side sections are connected together against relative movement to retain the predetermined shape of the panel member.

Abstract: Apparatus for erection of arcuate walls of poured concrete has one or more deformable sheathings secured to turnable supports which are movably secured to one another by composite girders having alternating rigid variable-length links and fixed-length connectors which are affixed to the supports. The angular positions of the supports are changed by changing the length of the links. Locking devices are provided to hold the links against angular movement relative to the neighboring connectors when the sheathing assumes the desired shape. The locking devices can constitute separable components or they may be permanently mounted on and/or integrated into the links and/or connectors.

Abstract: An apparatus for forming concrete structures which is comprised of size variable form units that can be erected in various forms by incorporating telescopic struts, telescopic batters with fastening means including spring catch members and spring latch members that can be interengaged and disengaged easily. Two members one of which is inclined relative to the other can be connected with a connecting means including a toothed member and a spring engaging member having a toothed face. Tiles can be adhered to the molded concrete structure simultaneously with the molding.

Abstract: A reusable panel system for making concrete form structures, especially, after concrete is hardened, forms are dismantled and construction is finished, various patterns or designs will be left on the ceiling and beam, and these patterns or designs are uniform, smooth and delicate, therefore, they could save labor and material and make building have a nice appearance.

Abstract: A waler bracket for use with a concrete wall form. The waler bracket includes a main frame portion attached to a stud projecting from the wall portion and a captive wedge portion for forcing the waler into firm contact with the face of the panel.

Abstract: An edge joist is provided for installation along an edge of a wallform sheathing panel. The edge joist is generally formed as a S-beam. A front flange thereof is generally L-shaped and engages the rear surface of the panel at one edge thereof. A rear flange is arranged generally parallel to the front flange and has a provision, such as a T-channel bolt slot, for connecting to wallform walers. A stepped web connects the lower edge of the front flange to an upper edge of the rear flange, and preferably includes a lower web plate extending back from the lower edge of the front flange, a riser extending slopingly back and upward from the rear plate, and an upper web plate extending rearward from the top of the riser to the rear flange. The front flange can have a toe plate overlapping and protecting the panel edge and a flange plate extending upward along the rear surface of the panel. Preferably, beads are formed along the lower surface of the web lower plate to form seals when edge joists are butted together.

Abstract: A concrete form has an embossed forming panel for molding a facade of brickwork in a particular pattern on a concrete wall or the like. Specially constructed support flanges are secured to the marginal borders of the panel on the exterior face of the latter to prevent undesired deformation of the borders. Each flange has a panel engaging surface and a plurality of projections on the surface adapted to be received within depressions in the borders presented by the brickwork pattern. In the preferred embodiment, the panel is embossed to resemble an English cross-bond brickwork pattern, and the marginal borders vertically traverse the pattern through vertically aligned joints in alternate courses, the flanges having similarly arranged projections to be received within the spaced depressions presented by the aligned, vertically spaced joints.

Abstract: A heated mold panel for casting concrete has a rigid base providing a base surface, a substantial part of which is grooved by interconnecting grooves, has a continuous heating element laid in the grooves, and the base surface is covered with a non-porous, non-corrosive material that provides a smooth outside surface covering the base surface, spanning the grooves and enclosing the element in interconnecting passages defined by the grooves and the covering material. Sufficient clearance is provided in said passages around the element for air to flow freely from passage to passage, whereby heat flow from the element to the concrete poured against the outside surface is by radiation from the element and by convection of air flowing in the passages around the element.

Abstract: A device is provided for connecting structural panels used to make pouring forms for concrete. It includes a connecting element dimensioned to fit between juxtaposed edge faces of adjacent form panels and having two sides one or both of which are provided adjacent the proximal edge faces of the panels with a longitudinal slot in which fasteners are engageable.

Abstract: A system for casting cement uses a plurality of lightweight forms made from a ladder-like, aluminum member covered on one side by a sheet of transparent plastic. The forms may be assembled and erected in any desired and suitable shape or configuration. As cement is poured, its surface may be viewed through the transparent plastic to find and correct surface blemishes. A series of connector and optional connection points enables the system to be used in many alternative ways.

Abstract: Removable form for use in pouring concrete walls, the form being comprised of a high strength, impact resistant, light weight material and being constructed to provide thermal insulation of concrete poured between two of the forms. The forms are each comprised of a face plate backed by an insulative support structure. The insulative support structure has a honeycomb construction filled with an insulative material, the honeycomb construction providing strength to the insulative support structure to prevent bending or distortion. A supporting frame is further provided as a structural supporting backing for the insulative support section to increase its resistance to bending.

Abstract: A liner for concrete forms and method for making poured concrete walls comprises a liner body constructed of insulative material and shaped for positioning between a pair of interconnected form panels. The liner body has opposing sides, one of which is positioned abutting an interior surface of a first one of the panels. The other side of the liner body as a textured, decorative surface spaced from the other panels, and is contoured for molding concrete poured therebetween. A plurality of similarly shaped liner bodies are placed in a side-by-side relationship along the interior surface of each section of form panels, with the textured surface of each oriented inwardly. Unsolidified cementitous material, such as concrete, is poured into the cavity having a single insert therein or formed between opposing inserts, and is cured to a solidified state.

Abstract: A portable decking system comprising a transporter, decking panels and support or shoring means. The transporter is provided with wheels so as to be movable and is used to transport and position the decking panels and/or the shoring means. Lifting means is provided on the transporter to selectively raise or lower a decking panel to a desired position. Once a decking panel is properly positioned by the transporter, the shoring means are utilized to support the decking panels and the transporter is removed. Each decking panel has mounted on its upper surface a plate on which concrete is poured. Each shoring means is provided with adjusting means for selectively adjusting the length thereof to facilitate the positioning and removal of the shoring means.

Abstract: A form for walls and the like of the type formed by two parallel, facing molding surfaces each of the surfaces being formed by a plurality of panels, each panel having a rigid appendix extending transversly of the molding surface thereof and the free end of which constitutes a rigid vertical element, the ends of said element having assembly and connection means for cooperating with the adjacent end of the vertical element of a vertically adjacent panel. Mutual locking means are provided on the vertical edges of adjacent panels; and means are also provided for connecting facing panels and locking the same against relative movement.

Abstract: A method and apparatus for forming concrete wall panels used in tilt-up wall buildings comprising a grooved, truncated triangle shaped speed set double chamfer fixedly attached to the building floor, a side wall form adapted to nest within a groove formed in the speed set double chamfer, means attaching the side wall form to the double chamfer, and a second speed set double chamfer inverted over and fixedly attached to the wall form, the wall form nesting interior to the inverted groove of the speed set double chamfer. The concrete wall panel to be formed is poured into a form having the perimeter comprising the invention. When the concrete has set, the upper speed set double chamfer and side wall form is removed and the wall panel tilted up and emplaced.

Abstract: A multi-purpose, extruded metal, joist-like, structural member which is designed for use in connection with concrete formwork, the member being generally of I-beam configuration and having associated therewith novel facilities whereby it may be nailed, bolted, screw-attached, clamped or otherwise secured to various types of support members (either in the form of lumber or structural metal parts) to the end that it assumes a proper operative position within a concrete wall or slab form installation.

Abstract: A composite concrete wall form unit or assembly consisting of three metal-clad panels connected together in edge-to-edge relationship, the medial panel embodying a plywood facing with a rectangular metal-reinforcing or backing frame, such medial panel constituting a prefabricated fill-in panel for making up an odd dimension which exists between two adjacent outer panels. Such outer panels are of a larger size and likewise are prefabricated in such a manner that they possess a common plywood facing which extends across the plywood facing of the smaller medial panel in face-to-face relationship and thus bridges the odd dimension. A special and novel transition bolt is used for connecting each side rail of the reinforcing frame of the medial panel to the adjacent side rail of the adjacent outer panel.

Abstract: A panel for casting concrete comprising a front casting plate having a flat front surface constituting a support surface for cast concrete and a rear plate spaced from the front plate. A layer of expanded plastic foam material such as polyurethane foam of high density is cast, in situ, between the plates and effects joinder of the plates with the foam layer to form an assembled panel which behaves as a beam and has high resistance to bending and shear stresses.

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: Formwork apparatus for casting concrete comprising a plurality of flattened tubular elongated elements each having one wall with an outer surface for contacting cast concrete and an opposite wall with a series of aligned apertures therein. The elongated elements are assembled in juxtaposed relation to constitute the form work by means of retainers which are disengageably interfittable with adjacent elongated elements. Each retainer includes two projecting flanges which penetrate into the interior of apertures of adjacent elongated elements and the flanges are provided with notches for engaging the walls of the elements at the ends of the apertures so as to lock the elements in place.

Abstract: A composite structure having a coating of thermoplastic material on a substantially inflexible substrate is disclosed. The composite structure comprises (a) a substantially inflexible substrate having a plurality of orifices in the surfaces thereof that is coated, the orifices being of a shape such that, at least in part, the cross-sectional area of the orifices increases as the distance from the surface of the substrate increases, and (b) a coating of solid thermoplastic material on the surface of the substrate. The thermoplastic material extends into the orifices at least as far as into the portion of the orifice of increasing cross-sectional area. Preferably the cross-sectional area of the orifices is greater than 0.005 square inches and the thickness of the coating is at least 10 mils. The substrate is preferably a cellulosic material, e.g., wood, hardboard plywood and the like, or metal. The thermoplastic material may be asphalt, bitumen, tar or a thermoplastic polymer, especially polyethylene.

Abstract: A waler bracket for use in a particular unitized form structure wherein the normally narrow waler is replaced with a scaffold platform and guardrail providing means to releasably maintain scaffolds and guardrail combinations havng varying widths.

Abstract: A form assembly for wall-like, large area concrete structures includes a generally planar, rigid panel arranged to abut similar adjacent panels providing a form for the wall-like sructure: a soft, resilient, stretchable plastic liner, mounted on and coextensive with the panel, with at least a complete peripheral seal between edge portions of the panel and the liner, with the liner being secured to the panel in the sealing areas so as to provide a generally airtight, inflatable pouch center-wise of the panel, and gas insertion means for inserting low pressure gas into the inflatable pouch portions for breaking the combined panel and liner from a set concrete structure.

Abstract: A multiple use, flexible, elastomeric liner for forms for concrete faced walls prepared by having a series of rigid panels in side by side relation, includes panels of liners for rigid panels having a concrete contacting face of a flexible, elastomeric synthetic polymer used throughout as a negative mold of a desired design in the finished concrete and having an opposed planar surface for face engagement with the form panels. The liner panels will not support the concrete for the wall without the backing panels. The elastomeric liner is a soft, flexible, resilient, elastomeric synthetic polymeric material which permits sharp relief designs having undercuts, and in edge engagement with similar panels squeeze together for a seamless surface in the completed concrete while leaving the impression of itself in exact detail in the hardened concrete.