General Reinforcement Definitions
Reinforcement
Reinforcement is a general term used in AS3600-2009 Concrete Structures and by designers, reinforcement processors and building contractors.
Reinforcement includes deformed bars, plain bars, wire, fabric (mesh) and steel products, all of which increase the tensile and compressive stress carrying properties of concrete.
Steel reinforcement is also the essential contributor towards crack control of concrete structures.
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A bar is a finished product rolled to close tolerances. Generally regarded as being supplied in straight lengths, it is also manufactured in coiled form. Australian Standard AS/NZS 4671 is a performance standard for reinforcing bars. There is no distinction between: Mill-produced lengths of straight bars range from 6 to 18 metres. Availability of lengths varies across Australia. For local availability contact ARC. |
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Reinforcing MeshMesh is manufactured in flat sheets with bars up to 12 mm diameter, or rolls for fabric with bars up to 5 mm diameter. The sheets are typically 6 metres by 2.4 metres. The fabric consists of reinforcing bar welded in either a square or rectangular grid. Automatic welding machines ensure that the grid of bars has consistent spacing to provide a defined cross-sectional area for designers. The bars are welded electronically using fusion combined with pressure. This fuses the intersecting bars into a homogeneous section without loss of strength or cross sectional area. Most reinforcing fabrics available in Australia are produced from deformed cold rolled bar of grade D500L reinforcement. One of the advantages of cold rolling is that the applied force required to drag the bar through the rolling cassettes provides an automatic check of the bar tensile strength in addition to the quality testing required by AS/NZS 4671. |
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