Reinfocrement Steel Mesh Fabric:
Where steel reinforcement of a slab is required for structural reasons, the specification will more than likely require high-tensile steel bars, as well as fabric mesh, which should be undertaken by a qualified e
sh, and the design engineer. Steel mesh comes in a wide array of profiles with varying mesh sizes and wire sizes as indicated in the table below.
The most commonly specified steel fabrics for paving works are A142 (6mm wires), A193 wires) and A252 (8mm wires). mesh is often used in 100mm
(7mm A142 )thick light-use slabs such as driveways and garage paths, and bases, while A252 is normally associated with heavier-duty 150-200mm thick slabs, with A193 used in either. In light-use applications, a single layer of fabric may be used, but in heavier jobs, two layers are used “top and bottom”.
There must always be a minimum of 50mm cover over steel reinforcement, both above, below, and around. The fabric is supported from beneath at regular intervals by Hystools, Wire ring spacers, concrete bar spacers, and Grade Plate Spacers which are purpose-made for use
with the sheets of Mesh fabric. . These spacers are placed roughly every 600mm or so, sufficient to carry the fabric without allowing it to sag unacceptably.