A refractory insert is provided, including a main body part having a first surface defining a first sidewall, an opposed second surface defining a second sidewall, and an outer peripheral surface separating the first and second surfaces, and a mechanical mating member provided on at least a portion of the outer peripheral surface thereof. The mechanical mating member includes a retention mechanism for controlling and retaining a position of a corresponding mating member in connection therewith.

Various implementations described herein are directed to a formwork system. In one implementation, the formwork system includes aluminum extrusions and aluminum castings. The aluminum castings and the aluminum extrusions can be assembled by being pressed and riveted together.

Various implementations described herein are directed to a formwork system. In one implementation, the formwork system includes aluminum extrusions and aluminum castings. The aluminum castings and the aluminum extrusions can be assembled by being pressed and riveted together.

A mold for making dry cast concrete blocks includes a pair of vertical shoulder forming sections, one along each of the opposite sides of the mold to form vertical front shoulders of a block. Each shoulder forming section has a shoulder roughening arrangement to result in molded, roughened shoulders of the block. Methods of making such blocks and the resulting block are included.

A mold for making dry cast concrete blocks includes a pair of vertical shoulder forming sections, one along each of the opposite sides of the mold to form vertical front shoulders of a block. Each shoulder forming section has a shoulder roughening arrangement to result in molded, roughened shoulders of the block. Methods of making such blocks and the resulting block are included.

A construction system for a module of a dwelling the main elements of which are made of plastic material includes a set of hollow profiled beams (1, 1) of elongate rectilinear shape of type 1 and of type 2. The beams (1, 1) include at each end (5, 5) a transverse passage opening (6, 6). The transverse passage opening (6) of a beam (1) of type 1 comes to be nested with the transverse passage opening (6) of a beam (1) of type 2 when the two beams (1, 1) are assembled end to end at a right angle leaving a passage opening (6, 6) between the two ends (5, 5) of the beams (1, 1). Two beams (1) of type 1 can be assembled with two beams (1) of type 2 to form a rectangular frame. The system further includes a set of corner assembly elements (2, 2), each assembly element (2, 2) including a body intended to pass through the transverse passage opening (6, 6) of the beams (1, 1) of type 1 and 2. The system also includes a set of plates (3) that can be assembled between two beams (1) of type 1 when assembled or two beams (1) of type 2 when assembled to form a rectangular frame, and a set of posts (11) of hollow rectangular section the hollow ends of which come to be nested over a corner assembly element (2, 2) of a rectangular frame formed of beams (1, 1) of type 1 and of type 2 so as to form a three-dimensional framework. The posts (11) include longitudinal rails or grooves (8) on two adjacent surfaces to receive other plates (3) between the posts (11) during assembly. Each hollow profile beam (1, 1) including along an upper surface spaced rails or grooves (8) intended to receive said other plates (3).

Embodiments of the present disclosure provide an apparatus for providing

an improved building block. The disclosure provides for a block made from recycled or new thermoplastic materials or other blend of materials. The new block design provides for geometric interlocking capabilities from block to block, layer to layer and wall to wall via an Interlocking Post and screws. This Post will not only mechanically interlock the block system but will as well mechanically hold the block in position via a metal screw.

Embodiments of the present disclosure provide an apparatus for providing

an improved building block. The disclosure provides for a block made from recycled or new thermoplastic materials or other blend of materials. The new block design provides for geometric interlocking capabilities from block to block, layer to layer and wall to wall via an Interlocking Post and screws. This Post will not only mechanically interlock the block system but will as well mechanically hold the block in position via a metal screw.