Abstract: A pour window for a metal concrete form flexible to a predetermined arcuate shape. A window panel of a generally rectangular shape forms part of a door which is pivotally mounted at one edge thereof for movement between an open and a closed position thereof. In the open position, concrete can be poured inside assembled forms intermediate the outside edges of the form assembly. In the closed position secured to structural members of the form, the window panel conforms to the generally arcuate shape of the form to present a substantially continuous arcuate surface for the forming of curvital concrete surfaces.

Abstract: A tie rod bearing unit for use in connecting together a pair of oppositely facing wall form structures of a concrete form assembly including upright structural beams with spaced-apart, back-to-back channel members, each of which has a pair of transversely opposite leg sections and an interconnecting web section. The tie bearing unit includes a bearing plate from a first side of which projects an open box member. In position against a beam, the box member of the tie bearing unit is in a friction fit with the web sections within the space between the channel members and the first side of the bearing plate is in contact engagement with the leg sections of the beam. A tie rod of the form assembly bears against the opposite or second side of the bearing plate. The tie rod bearing unit strengthens the beam and distributes the forces exerted by the tie rod.

Abstract: A device for leveling a longitudinally extended concrete form assembly including a ground-supported upright supporting beam wherein a block member for a threaded leveling screw is held in engagement with the upper surface of a lower end plate of the upright beam. The leveling screw is in axial alignment with a central throughbore of the end plate whereby on rotation of the leveling screw will extend and retract and lower end thereof relative to the bottom surface of the end plate to raise and lower the upright beam relative to the ground.

Abstract: A method for bracing a concrete form assembly by the interconnection of a first beam member and a second beam member by an inclined beam member. Each beam member is of a generally rectangular shape in transverse cross section and includes a pair of end plates. An adaptor unit of a right isosceles triangular shape in side elevation is used to connect the inclined beam to the first and the second beam. The hypotenuse section of a first adaptor unit is mounted on the first beam and the hypotenuse section of a second adaptor unit is mounted on the second beam. The locations of attachment are selected such that the distance between oppositely facing side sections of the adaptor units is equal to the length of the inclined beam member, which is inserted therebetween. Each end plate of the inclined beam member is bolted to the adjacent side section of an adaptor.

Abstract: A light-weight, high-strength beam member for use in concrete form assemblies. An end plate is secured by weldment to each end of a pair of channel members arranged in a back-to-back, spaced apart relation. The channel members includes a pair of transversely opposite leg sections with inturned terminal edges and an interconnecting web section. The terminal end portion of the web section is foreshortened by one-half the thickness of an end plate. In assembly, an end plate rests against the terminal edge of the web sections and is partially recessed in the leg sections and inturned edges of the channel members. Upon welding of the end plates to the channel members a high-strength end connection is created which permits full strength beam assemblies to be constructed by interconnecting end-to-end a plurality of individual beam members.

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: The cambered truss header is embodied in a shoring apparatus for pouring substantially horizontal concrete building sections. The truss header extends between and is supported on end runners which may be carried on floor-supported legs or on hangers mounted on upright building sections. A truss header may consist of a truss span having a top chord member, a bottom chord member, and a plurality of like brace members interconnecting the chord members. The brace members form an open web pattern wherein adjacent brace members are reversely inclined with the plurality of apices being connected to the top chord members a spaced apart distance greater than the spaced apart distance between the apices of the bottom chord member. The truss header is thus provided with a camber which tends to assume a horizontal position in response to a load placed on the truss header by the horizontal concrete building section.

Abstract: A climbing form for progressively raising a form assembly in the construction of a concrete wall comprises has a support frame that adjustably carries a mast form unit, a main mast assembled with the frame for relative up and down movement, and a jib mast, equipped with a lifting means, extended upwardly from the main mast. A carriage within the main mast is releasably locked to the frame when the main mast is moved relative to the frame, and is releasable for up and down movement within the upper section of the main mast to raise and lower a jib form unit. A reversible nut and shaft drive means has the shaft rotatably supported in the mast upper section with the nut mounted on the carriage. With the lower section of the mast secured to the wall, and the frame and carriage in locked engagement, the drive means operates to raise the frame and carriage relative to the main mast to a new pouring position for the mast form unit.

Abstract: A wall structure for a nuclear reactor containment housing or pool is formed by at least two metal concrete forms or panels, each of which has a rectangularly shaped main or base plate of a stainless steel material constituting inner liner portions of the wall structure. Projected laterally from the base plate is a peripheral flange that includes an outer portion, of a dimensional size substantially equal to the dimensional size of the base plate, and an inwardly inclined inner leg portion that is fixed to the base plate inwardly from the side edges of the base plate.