A building formwork component comprising first and second spaced sidewalls having one or more webs extending there-between, each sidewall comprising a flange extending inwardly along a first edge of the sidewall such that an outer surface of the flange forms a ramp surface; and a groove extending along an opposing second edge of the sidewall; wherein the component may be coupled to a like component by relative movement of the components towards each other, whereby the flanges are received in respective grooves of the like component, and whereby the ramp surfaces facilitate such coupling by engaging respective second edges of the like component to move the second edges and/or ramp surfaces for engagement of the flanges in the grooves.

Plastic cross ties constructed of a plastic pipe with two separate connectors attached to both ends act as a unit to position opposing masonry shells as part of a stay-in-place concrete form system. A three part cross tie assembly constructed of a pipe and concrete from connectors are snapped together with zip rods eliminating the need for screwing, nailing or gluing.

A stay-in-place form comprises a plurality of elongated panels connectable to one another in edge-to-edge relationship. The plurality of panels comprises first and second panels connectable to one another in edge-adjacent relationship by a connection which comprises a contact joint. The first panel comprise a longitudinally extending first seal-retaining projection shaped to project outwardly from the outer surface of the first panel at a location spaced apart from a first outer-surface transverse edge of the first panel in a first transverse direction. The second panel comprising a longitudinally extending second seal-retaining projection shaped to project outwardly from the outer surface of the second panel at a location spaced apart from a second outer-surface transverse edge of the second panel in a second transverse direction opposite the first transverse direction. The first and second seal-retaining projections and the outer surfaces of the first and second panels defining at least a portion of a seal-receiving concavity which opens outwardly from the form when the connection is made.

Plastic cross ties constructed of a plastic pipe with two separate connectors attached to both ends act as a unit to position opposing masonry shells as part of a stay-in-place concrete form system. A three part cross tie assembly constructed of a pipe and concrete from connectors are snapped together with zip rods eliminating the need for screwing, nailing or gluing.

The present invention relates to a method for replacing a conventional mold construction, and includes a plate-shaped outer insulating material, an inner plywood (or a board-shaped finishing material), a connection unit, and a lightweight temporary material. According to the present invention, a wall is constructed by connecting the inner plywood to the lightweight temporary material from a corner foundation surface and by laying bricks. Reinforcement bars are placed after an interior wall is constructed and arranged to cross each other or to align with each other as instructed in a design specification. Then, an exterior wall is installed corresponding to the connection unit connected to the inner plywood. As a result, a wall having a thermal bridge prevention effect and a higher quality is obtained. Either dry finish or a wet finish is applicable to the wall.

Disclosed herein is a system 100 for constructing an insulated thermal mass concrete structure comprising four or more walls 100a, 100b, 100c, 100d. The system 100 comprises interconnected frame members 30, 30, 30, 30, 30*, cross-ties 40 and corner members 33, 33, which reduces the need for props or stays to support the walls 100a, 100b, 100c, 100d during curing of a concrete core poured between inner and outer layers, 20, 21, 22, 23, 25 attached to the frame members 30, 30, 30, 30, 30*.

A building formwork module for use in a modular formwork system, the module comprising a first wall spaced away from a second wall, the first and second walls being connected by at least one web extending between the first and second walls, the first and second walls and said at least one web defining a channel extending over at least a part of a longitudinal length of the module, the channel adapted to accommodate fill material during use, the web further comprising at least two apertures spaced apart across the web in between the first and second walls such that during use one or more transverse reinforcing members can be positioned in between reinforcing members received in the spaced apart apertures thereby limiting movement of the transverse reinforcing member there-between during use.

The invention relates to a method for producing cast structures, and a set of connectors for connecting a pair of opposed, spaced apart boards which are useful in said method. A kit of elements useful as support frames in the production of the cast structures is also provided.

An insulated construction panel having a top end, a bottom end, a first end, a second end, a front side and a rear side, the panel for constructing a single or multi-thickness concrete form, the panel including regularly spaced coplanar passages extending completely through the panel from the top end of the panel toward and through to the bottom end of the panel. For each of the regularly spaced coplanar passages, an angular passage perpendicularly intersecting each coplanar passage at the top end and extending toward and through a portion of a front side surface of the front side and rear side surface of the rear side of the panel, each angular passage extending only partially through the panel from the top end toward the bottom end. For each of the regularly spaced coplanar passages, an angular passage perpendicularly intersecting each coplanar passage at the bottom end and extending toward and through a portion of the front side surface of the front side and the rear side surface of rear side of the panel, each angular passage extending only partially through the panel from the bottom end toward the top end.

A blast-resistant wall (10) comprises a first panel (20) and a second panel (30) in face-to-face spaced parallel arrangement is disclosed and securing means (21, 22) to secure the said panels (20, 30), in spaced end-to-end relationship with a further first panel and a second panel respectively, forming a first and second panel assemblies. To secure said panel-engaging portion to a panel, the securing means (21, 22) comprises a panel engaging portion (55) engaging a face (56) of each of neighbouring first or second panels (20, 30), A spacer section (52) separates the ends of adjacent panels. The first and second panel assemblies are connected via a plurality of lattice members (24), each lattice member (24) is attached at a first end to securing means engaging a first panel and at a second end to securing means engaging a second panel and extending between the panels, A cover member (70) bridges across adjacent first panels and second panels on the outer faces of the first panels and second panels and covers the spacer section.