Windeck is a pre-stressed concrete, manually-assembled, suspended floor system comprising pre-stressed concrete beams and reinforced concrete tiles. Dimensionally, Windeck is based on a 450 mm module. The Windeck assembly results in an off the shutter tile top surface, off the shutter surfaces to the beams and a self finished underside to the tiles. Other finishes may be applied if desired. Windeck accepts electrical cabling between tiles before grouting and tooling, and is fire resistant. Two beam depths and four tile types together with two types of end panels provide the components to meet most requirements.