Abstract: Modular mold equipment for producing concrete culverts with tight tolerances. Modular mold equipment having a coupling plate is used to align and interconnect components of the mold. The components being aligned may have recesses for receiving the coupling plate. Modular mold equipment system with an extended size range to cover all standard concreted duct product sizes. Modular mold equipment having a pallet guide adjustment mechanism adapted for setting the pallet at a desired location in relation to a form. The desired location is based on a wall thickness of a concrete culvert to be produced. Modular mold equipment having a core that includes a core corner and another core component adapted to be coupled to the core corner, and locking apparatus adapted to lock the core corner to the other core component via a mechanism that extends outside the core.

Abstract: A pin assembly (20) having a substantially automatic locking and stowing mechanism, including a latch (90), a biasing member (70), and an engagement pin (30). The engagement pin includes a hollow-tipped forward end, allowing a hardened core pin insert to be introduced. The latch is operably connected to the pin assembly such that raising the latch compresses, creating an extension force, and tensions, creating a rotational force, the biasing member, and applying a force to the rearward end of the pin assembly causes the extension force to drive the engagement pin forward through aligned openings of the adjacent panels and the rotational force drops the latch securing the two panels in place.

Abstract: A form clamp particularly useful in construction environments for clamping two side-by-side forming panels is provided. The form clamp includes a frame having a first jaw and a slider having a second jaw opposed to the first jaw. The slider is shiftable along the frame, and at least one includes a locating pin configured for receipt in holes in forming panels.

Abstract: A locking system 24 for securing adjacent concrete form panels 20a, 20b together during assembly of a concrete form 22 is disclosed. The locking system 24 includes a mounting block 50 which is removably attachable to one of the adjacent panels 20a, 20b. A slide member 52 is mounted for sliding movement relative to the mounting block 50 between a first position retracted from aligned apertures 48 in side members 30 of the adjacent panels 20a, 20b and a second position extending through the aligned apertures 48. The slide member 30 includes a bolt member 92 mounted to rotate within the mounting block 50 in its extended position between locked and unlocked positions to secure the adjacent panels 20a, 20b together. Alternatively, the bolt member 206 is configured to receive a wedge member 204 at its projecting end or has a clamping member 304 mounted to rotate on the bolt member 306 for securing the adjacent panels 20a, 20b together.

Abstract: An example concrete wall form assembly includes a frame having a plurality of studs. A first panel and a second panel fasten to the plurality of studs. The first panel and the second panel span the studs to provide a wall form that has a concrete receiving cavity having a cavity height. The wall form includes an aperture for moving concrete through the wall form to the concrete receiving cavity. The aperture has a first aperture height less than the concrete receiving cavity height.

Abstract: An assembly (20) for releasably interconnecting a pair of concrete form panels (22, 24) having adjacent, apertured walls (30) is provided which completely eliminates loose parts and significantly reduces panel setup and knock-down times. The assembly (20) includes an elongated pin (38) axially shiftable between extended and retracted positions, as well as an elongated connection arm (88) of length to bridge the adjacent walls (30) and engage the remote surface of the wall (30). An operating mechanism (42) is operatively coupled with pin (38) and arm (88). A latch assembly (96) serves to releasably maintain the pin (38) and arm (88) in their respective positions. Preferably, the pin 38 is mounted on a body (36) shiftable along a track (46); the latch assembly (96) is also supported on the body (36) to insure that the operating mechanism (42) can be properly latched in the retracted and extended positions of the pin (38).

Abstract: A retaining wedge for concrete forms has a tapered body of generally trapezoidal or triangular configuration. Oppositely diverging side edges of the body are provided with alternating peaks and valleys so as to present a number of detent-like depressions that encourage a firm and secure gripping action when the wedge is driven into the retaining slot of a locking pin that interconnects a pair of adjacent form panels. The peaks and valleys along each edge are presented by alternating convex and concave intersections between successive edge portions that slope outwardly at different angles from one another. Although certain portions of the edge slope outwardly at a higher angle than others, no edge portions slope inwardly toward the longitudinal axis of the wedge body. Consequently, the wedge is constantly tapering over its full length from one end to the other. A long, slender tip of the wedge facilitates insertion and fast starts.

Abstract: A concrete form has an embossed panel for molding a facade of brickwork in a particular pattern on a concrete wall or the like. Specially constructed support beams, struts and flanges are secured to the panel on the back of the panel 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. The panel is embossed to resemble a 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 concrete forming panel with lightweight siderail includes a face plate and a frame, the frame including at least one siderail and a bushing plate coupled thereto, the bushing plate having thereon a wear member of a material having greater hardness than the bushing plate. The wear member is positioned adjacent an opening in the bushing plate, the hole being in registry with a corresponding hole in the siderail, whereby fasteners passing through the hole and opening to couple the forming panel to other structural members in a concrete forming system, such as another forming panel, will engage the wear member. The use of a wear member permits the use of lighter weight siderails and bushing plates.

Abstract: A pin and wedge combination to couple adjacent panels of a concrete wall form together includes a pin with a tapered region along its shank to assist in removal of the pin from the hole in the flange of the panel and the tie-rod during disassembly of a concrete wall form.

Abstract: A construction form system comprising a plurality of construction forms each including a form sheet having a face side, a back side and a support section defined there between and a connection edge, a side frame for supporting the form sheet, the side frame having a face section and a wall section wherein the face section cooperatively mates with the connection edge of the form sheet to provide a form surface, at least one ladder extending from a side of the side frame to an opposite side of the side frame, and a plurality of brackets attached to the side frame adapted to support the form sheet and wherein the form sheet is free floating within the side frame to protect the form sheet from damage in operation such that at least one of the brackets is used to connect one side frame of one construction form to another side frame of another construction form.

Abstract: A form assembly for forming a concrete structure during drying of the concrete. The form assembly is formed of an elongated plastic form having a front wall for engaging the concrete and a rear wall. The front wall is spaced apart from the back wall to define a pocket for receiving at least one connecting member. The connecting member is secured in the pocket to project a distance beyond an end of the form. A slidable stake holder may also be provided to slide in a C-shaped pocket in the form. The stake holder has right and left flanges that abuttingly engage the rear wall and at least one preformed nail hole is provided in each of the right and left flanges.

Abstract: A concrete forming panel has built-in retaining structure for holding loose coupling parts in a safe, secure position when the parts are stored during times of nonuse of the panel. Members on the backside of the face plate of the panel, including but not necessarily limited to bracing or stiffening members of the frame, are provided with webs or wall portions having a series of clearance openings therein. Brush rings are positioned immediately adjacent each opening and have radially inwardly directed resilient bristles that terminate in innermost ends defining a hole aligned with the adjacent opening. Consequently, when a oversized coupling part relative to the brush hole is inserted into such hole, it flexes the bristles and passes through the hole and the adjacent opening in the supporting member to be retained in place in a yieldable, releasable manner by the flexed bristles.

Abstract: A concrete forming panel with lightweight siderail includes a face plate and a frame, the frame including at least one siderail and a bushing plate coupled thereto, the bushing plate having thereon a wear member of a material having greater hardness than the bushing plate. The wear member is positioned adjacent an opening in the bushing plate, the hole being in registry with a corresponding hole in the siderail, whereby fasteners passing through the hole and opening to couple the forming panel to other structual members in a concrete forming system, such as another forming panel, will engage the wear member. The use of a wear member permits the use of lighter weight siderails and bushing plates.

Abstract: A sliding pin is selectively mounted to the back of a poured concrete wall form panel for use in combination with a standard wedge for coupling adjacent panels of the concrete wall form together. The pin when attached to the panel conveniently slides relative to the panel to and between engaged, stowed and retracted positions. Furthermore, the pin is captured within a carrier and is rotatable for convenient access to the slot in the shank of the pin. The components of the system are durable to withstand impact blows by a hammer or other tool, do not require specialized hardware for their use and will not be fouled by splashed concrete or other debris.

Abstract: A method and apparatus for retaining separable parts for a concrete forming panel includes the provision of a retaining member on the forming panel located separately from any one of a plurality of coupling sites. Separate and discrete parts may be held on the retaining member until the parts are ready for use. The retaining member may include a reinforcing bar having at least one and preferably a plurality of openings therein for frictionally holding the part therein. The opening may be provided with a gripper to enhance the frictional engagement and improve the parts holding ability of the retaining member. The retaining member may include a magnetic coupler which is especially useful with aluminum forms for holding steel parts in position. Further, the retaining member may include a self-sticking material with cooperating components on the part and the form whereby the parts may be readily attached and removed from predetermined areas on the forming panel.

Abstract: A holder comprising a rigid base bar having a pin end and a stabilizing end; a rigid stabilizing bar having a base end and an opposite end, with the base end of the rigid stabilizing bar being rigidly attached to the stabilizing end of the rigid base bar, and extending perpendicular to the rigid base bar; two nails being each having a head end and a pointed end, with the head end of the each nail being rigidly attached to separate points along the rigid stabilizing bar, and with the pointed end of the each nail being extended perpendicular to the rigid stabilizing bar and parallel with the rigid base bar and toward the perpendicular direction of the rigid base bar; and the rigid base bar having a bore through it in a direction parallel with the length of the rigid stabilizing bar.

Abstract: A wall form panel for use in constructing a poured concrete wall form is preferably extruded from aluminum and a plurality of sections which are joined together form the wall form panel. The outer side most sections of the wall form panel advantageously include integrally formed and extruded side flanges to provide enhanced load-bearing capability and reduce the likelihood of failure. The extruded panel sections are coupled together along longitudinally extending joint members and reinforced beams and struts are welded to the back face of the wall panel sections for added strength and rigidity. Advantageously, the wall form panel sections can be formed in a plurality of widths and joined together in various combinations to conveniently provide a variety of widths of wall form panels. The side flanges of the wall form panels includes holes for attaching pins and other associated hardware.

Abstract: In the poured concrete wall industry, adjacent form panels are commonly coupled together by a slotted pin and wedge combination. Advantageously, the slotted pin and wedge combination includes a sloped wedge so that the narrow end of the wedge is spaced from the wall panels for easy access and disassembly of the pin and wedge when separating the adjacent wall panels after the poured concrete wall has cured. The sloped wedge is formed by a curved inner surface and a curved outer surface extending towards the narrow end of the wedge. With the curved inner and outer surfaces meeting at a rounded blunt end to allow a hammer to strike the wedge free of the slotted pin upon disassembly of the form panels.

Abstract: An apparatus for interconnecting form structures, such as formboards and the like, is disclosed which allows for the permanent or removable attachment of a connecting device to the ends of adjacent form structures and which provides for the quick and easy assembly and disassembly of the forms. The connecting device employs opposing connector plates which can be permanently or removably mounted to abutting ends of successive form structures and has a latching device which allows the connector plates to be quickly and easily latched and unlatched for efficient assembly and disassembly of the forming structures.

Abstract: A universal reusable system is provided for molding concrete or other settable fluids for use in building construction. In the subject system, apertured composite plastic panels and frames, prestressed by the presence of an array of removable and interchangeable oversized plastic plugs, are positioned and held in place by a framing system which utilizes a combination of apertured strips used as base guides and both vertical and horizontal channels, as well as dowels and plugs. The use of apertured panels and framing system provides for a reusable assembly whose dimensions can be readily set on site for each application and whose rectilinearity is maintained either by the dowel-aperture combination or by a combination of oversized plugs in adjacent members to be joined and connectors therebetween.

Abstract: A pin and wedge combination to couple adjacent panels of a concrete wall form together includes a self-retaining pin with a spring biased ball to temporarily retain the pin in the hole in the flange of the panel during assembly of a concrete wall form without adding significant weight to the associated components or the panels or requiring costly modifications to existing panels.

Abstract: An assembly (20) for releasably interconnecting a pair of concrete form panels (28, 28a) having adjacent, apertured walls (30, 30a) is provided which completely eliminates loose parts and significantly reduces panel setup and knock-down times. The assembly (20) includes an elongated pin (22) axially shiftable between extended and retracted positions, as well as an elongated connection arm (24) of length to bridge the walls (30, 30a) and engage a surface (44a) of one wall (30a). An operating mechanism (70) is operatively coupled with pin (22) and arm (24) and serves to draw the walls (30, 30a) together when pin (22) is extended through the wall apertures (32, 32a). A latch assembly (96) serves to releasably maintain the pin (22) and arm (24) in their respective positions.

Abstract: A modular wall form assembly includes two adjacent form units and a fastening lever. Each of the form units has an upright flat panel, a connecting plate extending rearwardly and inclindedly from the mating edge of the flat panel. Each of the connecting plates has a positioning hole which has a generally oblong cross-section which has two opposed side walls defining its width. The connecting plates contact complementarily one another and the positioning holes are at least partially aligned with one another. The fastening lever has a handle portion and a fastening portion. The fastening portion has a base portion, a neck portion and an enlarged head portion. Each of the neck and head portions has a generally oblong cross-section. The neck portion has two opposed shorter sides in the lengthwise direction.

Abstract: A connecting device is provided for interconnecting two juxtaposed upright form panels used in forming a concrete wall. The form panels have adjacent mating edges between which an edge connecting plate is interposed tightly and removably. The connecting device includes first and second mounting plates secured respectively to the form panels adjacent to the mating edges of the form panels. Each of a pair of guide rods has an end portion extending through the first mounting plate and secured to the second mounting plate so as to permit relative lateral movement between the form panels. A driving screw has a threaded shank portion which extends through the first mounting plate and which extends threadably through the second mounting plate. A positioning screw has a threaded shank portion extending threadably through the second mounting plate and abutting against the first mounting plate.

Abstract: A floor form assembly is adapted for use in the construction of a concrete floor of a structure that is enclosed by surrounding walls, and includes a plurality of mounting devices adapted to be mounted on the surrounding walls at a top portion of the structure, a plurality of elongated girders connected removably and longitudinally to one another so as to be adapted to extend along a lengthwise direction of the top portion of the structure, a plurality of supporting ribs connected removably to the girders such that the supporting ribs extend transversely from opposite longitudinal sides of the girders and are disposed spacedly on the girders so as to be adapted to extend along a transverse direction of the top portion of the structure, a plurality of vertical form units, each being connected removably to distal end portion of one of the girders and the supporting ribs, the vertical form units being adapted to form an enclosing frame that is supported removably on the mounting devices and that is adapted to be

Abstract: A form assembly includes a pair of rows of clasp members mounted respectively on back sides of two form members thereof in alignment with each other. Each clasp member includes a horizontal section extending rearward from each form member, a vertical section projecting downward from a distal end of the horizontal section, and a hook section projecting forward from the vertical section for defining a hook groove. Each pair of aligned clasp members is provided with a T-shaped latch member which has two arm portions to engage the aligned clasp members, and a handle portion extending from and intermediately of the arm portions. Each arm portion has a polygonal cross-section, a first side, and a second side opposing the first side. The second side of each arm portion is insertable into and is pivotable within the hook groove when each arm portion is pressed against the horizontal section to engage frictionally the vertical section, thereby placing tightly each arm portion in the clasp member.

Abstract: A modular wall form assembly includes two upright wall form panels, a bridging plate interposed removably between the wall form panels, and a plurality of coupling devices for connecting securely the wall form panels and the bridging plate. Each of the coupling devices includes at least three horizontally aligned coupling seats mounted respectively on the rear sides of the wall form panels and the bridging plate, and a T-shaped coupling lever. Each of the coupling seats is formed with a rectangular hole and a notch that is located on a longer side of the rectangular hole and that extends to the rectangular hole. The notch has a width shorter than the length of the longer side of the rectangular hole. The coupling lever has a handle that is transversely aligned with respect to a coupling portion. The coupling portion has a cross section that corresponds in size with the rectangular holes of the coupling seats.

Abstract: In order to provide self-containment in a waler clamp assembly with adjustment capabilities, the assembly includes a generally U-shaped bracket having a pair of generally parallel spaced legs joined at one end by a connecting bight portion with one of the legs having a distal end with a latching key adapted to fit into a hole in a form support. Specifically, the latching key is adapted to fit into the hole in a first orientation of the bracket relative to a concrete form and is also adapted to be securely locked within the form support in a second orientation of the bracket relative to the concrete form, and the bracket also has generally aligned openings in the legs near and generally parallel to the bight portion at a point opposite the latching key.

Abstract: A modular form assembly for a concrete structure includes vertical channel pieces coupled detachably side by side to one another, and horizontal reinforcement units interconnected detachably. Each channel piece includes two opposing vertical walls, and an intermediate vertical wall interconnecting the vertical walls and serving as a form wall. Each vertical wall is attached detachably to the adjacent vertical wall to arrange the form walls in a common vertical plane. The reinforcement units are attached detachably to the vertical walls opposite to the form walls so as to keep the form walls in the common vertical plane. Each reinforcement unit includes a horizontal plate, first flanges extending vertically from two opposing sides of the horizontal plate, and second flanges extending vertically from two other opposing sides of the horizontal plate. Each second flange abuts against and is connected detachably to the adjacent second flange.

Abstract: A form panel 1 has marginal sections 2, arranged at parallel edges or running around all the edges, which have a hollow cross-section and have in each case located at right angles to a lining skin 3 an abutment web 4 composing the outermost edge of the form panel 1. The abutment web 4 can be laid against a corresponding abutment web 4 or against a marginal strip 5, for instance a flat marginal strip 5 of a neighboring form panel. The further webs of the hollow marginal section 2 are in the form of an approximately U-shaped section 6 with two U-limbs 7, 8 and a crosspiece 29. The edges of the U-limbs 7, 8 are overlapped by the abutment web 4, and at least one U-limb, suitably the U-limb 7 remoter from the lining skin 3, is firmly connected, e.g., welded, to the abutment web 4. The abutment web 4 has a fastening flange 9 engaging, particularly lapping over the side of the lining skin 3 facing the concrete, but at the same time suitably sunk into the lining skin 3.

Abstract: Formwork with form panels 1 and connecting means, namely clamps 7 and/or bolts 11 includes closed, hollow marginal sections 2 having an abutment web 5 projecting at right angles to a lining skin 4 and extending along the outermost edge of the form panel 1 and serving to be laid tightly against a corresponding abutment web 5 or flat marginal strip 13 of a neighboring form panel. Holding webs 6 of the marginal sections 2 may have depressions 8 for application of clamp points. Oblong perforations or keyholes 10 for inserting connecting bolts 11 are provided side by side, in spaced relationship, longitudinally of the abutment web. The connecting bolts have projections 12 that jut out radially from an end of the bolt and engage behind the edges of the perforations in a locking position. The spacing and size of the perforations 10 corresponds with similar perforations 10 in marginal sections 2 or flat marginal strips 13 of adjacent form panels 1.

Abstract: A wall form assembly (10, 10", 10'") has a pair of form wall assemblies (12A, 12B) which are kept in preselected spaced parallel relationship by means of cross members (16) fitted within end slots (36) and interlocked by means of pins (38) with elongate braces (30) mounted for movement from a low profile position for transport to a high profile operative position in which the width dimension (32) is transverse to the plane of the form wall (18-22B) for maximum resistance to bowing from the hydrostatic forces of wet cement.

Abstract: Apparatus for in situ attachment of insulation panels to poured concrete walls as the walls are formed. Preferably, polymeric F-shaped strips are attached to novel tie bars by transverse retainers, and receive the edges of insulation panels to hold them against the forms so that uncured concrete is poured between the forms and against the panels. After the concrete is cured, the forms are removed, leaving the insulation panels and the strips, the strips serving to receive dry wall fasteners.

Abstract: A modular building system for constructing the frame of a structure. Standardized foundation forms, vertical forms, and tie beam forms are attached to each other. The vertical forms are hinged so as to be capable of defining a corner of any angle. Cover plates are selectively inserted into the tie beam forms so as to define a reception recess which corresponds to the size of a roof truss being used. The various forms can be attached to each other with a minimal amount of labor.

Abstract: A formwork component for the erection of cast structural walls, particularly for the erection of concrete walls. The formwork components includes a formwork plate with stiffening elements, for example, frames or girders, being mounted at the rear side of the formwork plate. Rails are provided on at least two oppositely located edges of the formwork plate. When several formwork plates are located next to each other or one above the other, the rails are located next to each other. The rails are connected by connecting elements, such as screws, clamps, or braces. Positioning, elements are provided on the rails. The positioning elements are projections and abutments which receive the projections and have a shape corresponding to that of projections.

Abstract: A formwork panel has a board and a frame for the board. The frame is made up of strips of sheet material which extend along respective edges of the board and project from the edges at right angles to the board. Each strip has a flat longitudinal marginal portion adjacent to the board and a flat longitudinal marginal portion remote from the board. The marginal portions of a strip are located in a common plane. Each strip further has two protrusions which respectively extend from the marginal portions of the strip towards the opposite strip of the frame and define recesses opening away from the opposite strip. A protuberance is disposed between the two protrusions of a strip. Each protuberance extends from the adjoining protrusions away from the opposite strip and defines a depression opening towards the opposite strip.

Abstract: A formwork, a device for clamping the formwork and a mechanism for actuating the clamping are taught. The formwork includes two molds, which mount together. The clamping device secures the mounted molds and allows the formwork to operate. The clamping device includes a movable member and a tension member, which locks the movable member to protruding sections of each mold. This clamping device is duplicated along the length of the protruding sections. The mechanism for actuating the clamping exerts force upon the movable member to secure it between the tension member and the protruding sections. This same mechanism can withdraw the movable member from the clamp. By this, the clamping is accomplished and a more efficient formwork is achieved.

Abstract: A latching bolt mechanism for fastening adjacent concrete form panels together to make a larger form work is disclosed. The mechanism includes a base permanently mounted on a form panel and a slidably attachable and detachable latching bolt mechanism having a tapered engagement pin for penetrating aligned apertures in the side rails of adjacent panel forms. The latching bolt further includes a tapered pin sleeve engaging portion that is received in the central bore of a pin sleeve, allowing transverse, shearing forces on the engagement pin to be readily dissipated. The pin sleeve in turn reciprocates within the central bore of a self-lubricating guide sleeve, which is seated within a housing block. A detachable mounting system includes a mounting bracket attached to the form panel and mating flanges on the housing block.

Abstract: A standardized concrete form includes a series of rectangular slots spaced along the sides thereof and which extend virtually the entire length thereof which, along with mounting holes, permits the standardized hardware pins to join adjacent concrete forms at virtually an infinitely variable step height therebetween. The standardized mounting holes are formed in cloverleaf shape in order to accommodate and facilitate the insertion of hardware pins when adjacent forms are slightly misaligned.

Abstract: An improved, lightweight, retrofittable pin assembly (10) for the releasable interconnection of end-to-end abutting concrete form panels (12, 14) is provided which includes an elongated, tapered, axially shiftable pin (16) as well as coupler (18) for coupling the pin to an end wall (24) of a panel (12). The coupler (18) includes a resilient metallic retaining ring (58) which frictionally and compressively engages the pin in substantial alignment with an associated aperture (27) in end wall (24). The pin (16) preferably includes a pair of elongated, opposed sots (34, 36), and a two-piece, split tab washer (60) is employed for preventing complete detachment of the pin (16) from assembly (10) during use thereof.

Abstract: A latching bolt mechanism for fastening adjacent concrete form panels together to make a larger form work is disclosed. The mechanism includes a base permanently mounted on a form panel and a slidably attachable and detachable latching bolt mechanism having a tapered engagement pin for penetrating aligned apertures in the side rails of adjacent panel forms. The latching bolt further includes a tapered pin sleeve engaging portion that is received in the central bore of a pin sleeve, allowing transverse, shearing forces on the engagement pin to be readily dissipated. The pin sleeve in turn reciprocates within the central bore of a self-lubricating guide sleeve, which is seated within a housing block. A detachable mounting system includes a mounting bracket attached to the form panel and mating flanges on the housing block.

Abstract: An attached locking pin for releasably securing adjacent concrete forms used in the formation of poured concrete. Such concrete forms are characterized by having a peripheral rail with apertures therethrough adapted to abut the rail and align the apertures of an adjacent form to hold the cement in its desired shape until the concrete has set. The attached locking pin includes a sleeve with an opening therethrough adapted to interlock within one of the aligned apertures of abutting rails. A pin is provided having a head and an end with an intermediate portion having a slot passing therethrough typically for receiving a locking wedge. The pin is adapted to pass the end and slotted intermediate portion through the sleeve and the adjacent aligned aperture to releasably hold the abutting rails securely together after the wedge is driven into the slot.

Abstract: A concrete form panel construction for adjoining adjacent form panel sections includes flanges or portions having opposing longitudinal grooves or apertures. Connectors extend between pairs of adjacent extension sections and have an opposed finger portion extensible into the grooves or apertures and clamp the paired extension sections together. The finger portions locate the pairs of extension sections against transverse movement and permit only, upon loosening and tightening, longitudinal movement. The advantage gained by the disclosed form panel construction is that it provides increased flexibility for concrete form construction without holes to admit concrete flashings, is adaptable to common configurations of pin lock devices and provides for a forming surface for a vertical section and a wood strip for easy nailing of a plywood floor section, as for a ceiling corner form.

Abstract: A form for the pouring of concrete has first and second panels which are disposed edge-to-edge. Each of the panels has a flange projecting from the major surface of the respective panel and the flanges have confronting first surfaces which are perpendicular to the major surfaces of the panels and are designed to abut one another. The flanges have second surfaces which face away from the first surfaces and the second surfaces are inclined to the major surfaces of the panels so that the flanges narrow in a direction away from the panels. A clamping element designed to embrace the flanges is pivotally mounted on the first panel and is movable between a released position and a clamping position in which it embraces the flanges. The second panel carries an abutment and the clamping element has a free end which is located between the abutment and the flange of the second panel in the clamping position.

Abstract: A latching bolt mechanism for fastening adjacent concrete form panels together to make a larger form work is disclosed. The mechanism includes a base permanently mounted on a form panel and a slidably attachable and detachable latching bolt mechanism having a tapered engagement pin for penetrating aligned apertures in the side rails of adjacent panel forms. The latching bolt further includes a tapered pin sleeve engaging portion that is received in the central bore of a pin sleeve, allowing transverse, shearing forces on the engagement pin to be readily dissipated. The pin sleeve in turn reciprocates within the central bore of a self-lubricating guide sleeve, which is seated within a housing block. A detachable mounting system includes a mounting bracket attached to the form panel and mating flanges on the housing block.

Abstract: In a concrete forming structure for forming residential concrete including a series of upright side-by-side positioned forming panels of the type having a face sheet and I-beams secured thereto at margins of the face with adjacent I-beams on adjacent panels co-acting to act as siderails, the I-beams carrying vertically spaced bushings, and with the panels having wedge bolts extending through aligned bushings securing the panels in assembly together, one piece waler brackets mounted on the siderails in horizontally spaced relation for carrying horizontal lengths of lumber which comprise alignment walers, each of the waler brackets including a horizontal waler bracket leg and an upright bracket leg secured in fixed assembly to the horizontal waler bracket leg at a point spaced from an inner end of the horizontal waler bracket leg, an L-shaped bracket angle fixedly attached to the horizontal waler bracket leg and cooperable therewith to define a U-shaped rearwardly facing channel, and a wedge bolt fixedly secure

Abstract: A modular form includes form plates in edge-to-edge contiguity, fasteners provided along adjacent longitudinal sides of the plates to fasten releaseably the form plates, reinforcement channel pieces attached detachably to the form plates along the transverse sides thereof, and trussed backing members extending longitudinally between the channel pieces, each of the trussed backing members having two opposite joint ends, the joint ends being detachably connected to the channel pieces.

Abstract: A shuttering apparatus includes at least two rectangular shuttering panels (22, 22') which have a plurality of bores of the same dimensions which extend along at least one edge (13, 15) in a row parallel to the edge and are arranged in accordance with a grid dimension at grid points having the same spacing. The bores have axes extending perpendicular to the edge. The shuttering panels are capable of being placed together with their edges containing the bores (11, 11') being so aligned that several connection bores (11, 11') of the one shuttering panel are aligned with several connection bores (11, 11') of the other shuttering panel. In this way a form locked connection of the shuttering panels (22, 22') in the direction of the edge (13, 15) which contains the lines of bores can be brought about by fitted connection pins which are placed through at least some of the aligned bores (11, 11') of the two shuttering panels (22, 22').

Abstract: A curved concrete forming structure to provide a 1000 psf system for forming curved walls having a radium in excess of 5'. The structure includes a series of arcuately curved metallic panels secured in stacked side-by-side assembly. The improvement particularly concerns a panel which is comprised of a flexible metallic skin plate. Spaced vertically extending ribs are positioned along the length of the panel on one side thereof. The ribs and the skin plate have essentially the same vertical dimensions. A pair of vertically spaced arcuately curved angles are provided which angles have identical diameters that correspond to the diameter of the concrete wall to be poured using the concrete forming structure. The curved angles are substantially stiffer and inflexible compared to the flexible skin plate.