A hinged corner for a construction form includes a first flange connected to a first mounting plate for a form member and a second flange connected to a second mounting plate for a form member. The first flange and the second flange pivot relative to one another in an overlapping relationship about a pivot point disposed between the first mounting plate and the second mounting plate.

A collapsible formwork element, the element including: a pair of opposing side wall panels; and at least one connector member extending between the side wall panels, wherein the formwork element is movable between an expanded configuration, wherein the opposing panels are spaced apart, and a collapsed configuration, wherein the opposing panels are relatively closer together.

A collapsible formwork element, the element including: a pair of opposing side wall panels; and at least one connector member extending between the side wall panels, wherein the formwork element is movable between an expanded configuration, wherein the opposing panels are spaced apart, and a collapsed configuration, wherein the opposing panels are relatively closer together.

The invention relates to a shuttering element and to a method for constructing a concrete structure in a cavity. The shuttering element according to the invention is intended for the construction of a vertical wall of a concrete structure intended to contain a liquid. The shuttering element (100) comprises a first shuttering panel (110) made of perforated sheet metal, a second shuttering panel (120) made of fiber cement, and a plurality of spacers (130). It is possible to use the shuttering element (100) reversibly in the construction method. The construction method allows the production of a one-piece reinforced concrete structure which is dimensionally stable and not likely to crack. Furthermore, it is readily possible to widen the upper leveling of the walls in order to support the curbstones without any risk of cracks and/or breakages. Furthermore, the structure is variable while being compatible with any finishing covering.

A form for forming a void or an architectural feature of a predetermined configuration in a moldable forming composition is disclosed. Embodiments of the invention provide an adjustable form body having first and second sides, said form body configurable between a first substantially planar position and a second non-planar position. In some embodiments, the form comprises a surface coating. A form body according to example embodiments of the invention has a plurality of grooves.

A void form is composed of molded pulp and includes bottom-facing openings. Fresh concrete placed on top of a substrate material covering the void form structure is formed with a void space underneath that allows soil to expand.

A collapsible formwork element, the element including: a pair of opposing side wall panels; and at least one connector member extending between the side wall panels, wherein the formwork element is movable between an expanded configuration, wherein the opposing panels are spaced apart, and a collapsed configuration, wherein the opposing panels are relatively closer together.

A rough-in box used during the construction of buildings having poured concrete flooring, such as multi-story high-rise buildings. The rough-in box may be used to retain an opening in the floor through which plumbing and mechanical components may be installed after concrete has been poured around the device and hardens into a slab. The present invention also relates to a method comprising the steps of assembling the side walls of a box, placing a lid made of a material stronger than that of the side walls and capable of supporting a weight of 2,000 pounds, placing the box over a hole on the floor, and pouring concrete to form a floor around the box. The box will remain in place providing an accessible penetration through the flooring with space for plumbing connections and a flush surface with the floor over which pallet jacks and workers may travel without obstruction.

A method can produce an assembly for a line penetration. The method includes: (a) cutting a fire-protection mat forming a fire-protection module to length appropriate for the size of the line penetration, where the fire-protection mat has a flexible carrier element, on at least one end region of which a fire-protection tape of an intumescent material is fastened, (b) bending the fire-protection mat into a circular shape and joining opposite rims of the fire-protection mat to one another via a joining means, so that the fire-protection tape is disposed in a region of an axial end of the circularly shaped fire-protection mat, and (c) fastening at least one mechanical positioning element constructed separately from the fire-protection mat on the fire-protection mat and which is arranged in such a way that the assembly can be fastened, via the mechanical positioning element, on a wall or on formwork.

A rough-in box kit (100) for creating a rough-in box (200) to create a penetration in poured concrete flooring during the construction of concrete buildings. The rough-in box kit (100) includes a single unitary piece (1) having a flat section (5) with: a top end; a bottom end opposite to the top end; an inside surface (5a) located between the top end and the bottom end, and configured to form an inside surface of the rough in box (200); and an outside surface (5b) opposite to the inside surface (5a), and configured to form an outside surface of the rough in box (200). The single unitary piece (1) also has a top flange (3) connected to and extending away from the top end of the flat section (5), and perforations, through-holes, or slots (2) that are formed in the flat section (5). The single unitary piece (1) is configured to be bent at locations corresponding to and lining up with the perforations, through-holes, or slots (2) so as to form the rough-in box (200).