In one arrangement, shown in FIG. 1, there is provided a formwork restraint for a reinforcement bar. The formwork restraint includes a restraint portion for receiving the reinforcement bar. The formwork restraint further includes a support portion adapted to connect the restraint portion to a reinforcing formwork arrangement to maintain a desirable relationship between the reinforcement bar and the reinforcing formwork arrangement.

A rebar support chair having a chair body including a plurality of conjoined legs, the conjoined legs defining a receiving area and a foot affixed to at least one leg.

A rebar support chair having a chair body including a plurality of conjoined legs, the conjoined legs defining a receiving area and a foot affixed to at least one leg.

A rebar spacer installed in a rebar crossing portion includes a spacer body and a pair of installation metal fittings. The spacer body includes a main portion and a pair of leg portions integrally formed with the main portion. The pair of leg portions is protrudingly provided with an interval on a rebar-side surface of the main portion. The interval between the pair of leg portions is equal to or larger than a diameter of the rebar and a depth of the pair of leg portions in an installation direction is equal to or less than the diameter of the rebar. Each one of the pair of installation metal fittings has a structure such that one end portion is locked into one of the pair of leg portions and the other end portion is hooked on a back-side rebar.

There is proposed a reinforced concrete structure comprising a reinforcement assembly embedded therein, the reinforcement assembly including first and second lengths of chain, wherein the first and second lengths of chain being pretensionable prior to forming the concrete structure. The reinforcement assembly includes pretensionable member/s and/or resiliently deformable member/s intermediate of at least one tetherable end of the lengths of chain and a mounting block or link member.

There is proposed a reinforced concrete structure comprising a reinforcement assembly embedded therein, the reinforcement assembly including first and second lengths of chain, wherein the first and second lengths of chain being pretensionable prior to forming the concrete structure. The reinforcement assembly includes pretensionable member/s and/or resiliently deformable member/s intermediate of at least one tetherable end of the lengths of chain and a mounting block or link member.

A system for supporting and holding in place an object (for example and not by way of limitation, anchor bolts, steel plates and the like) to be embedded in concrete. A device having a shaft and a tower can be used to support the object, by inserting the shaft into an opening in the tower and rotatably locking the shaft in place at the desired height, an embed can be supported in the desired position. Concrete can be poured around the support to embed the object at the desired position within the concrete.

A system for supporting and holding in place an object (for example and not by way of limitation, anchor bolts, steel plates and the like) to be embedded in concrete. A device having a shaft and a tower can be used to support the object, by inserting the shaft into an opening in the tower and rotatably locking the shaft in place at the desired height, an embed can be supported in the desired position. Concrete can be poured around the support to embed the object at the desired position within the concrete.

A slab bolster including a longitudinally-extending spine and a plurality of legs coupled to the opposite sides of the spine and extending away from the spine. The slab bolster has a frangible portion along which the slab bolster is configured to be manually broken to allow the slab bolster to be manually separated into at least two parts.

A slab bolster including a longitudinally-extending spine and a plurality of legs coupled to the opposite sides of the spine and extending away from the spine. The slab bolster has a frangible portion along which the slab bolster is configured to be manually broken to allow the slab bolster to be manually separated into at least two parts.