SPEEDFLOOR® Suspended Concrete Flooring is one of the lightest suspended concrete floor systems available in the market, incorporating a unique composite floor of steel and concrete, which makes light work of pouring anything from single-level, to multi-level structures. The galvanised steel joists are easy to assemble and light enough to be positioned by hand. There is no propping required - simply assemble the joists, add structural supports and you are ready to pour. Floors can typically achieve composite action in 72 hours. Manufactured from galvanised, high strength steel in a one pass roll-former, the frame is light enough to be manhandled into place for pouring. The ends are simply bolted to the joists which are then ready for transporting to site with no propping or painting required. Slabs can be 90mm to 220mm in thickness. Minimum compressive strength of 25mPa to achieve composite action is normally achieved within the first 72 hours of curing, depending on environmental conditions.