Floor boards, floor boards, floor plate, steel plate, pressure plate refers not only as permanent formwork concrete floor, and as the lower floor of the reinforced floor of the force involved in the calculation, together with the concrete form work composite slab. Floor advantages (1) light weight (2) high strength (3) stiffness (4) to facilitate the construction of fast (5) a combination of easy-to-update (6) to facilitate industrial production composite slab construction requirements: (1) a combination of floor-pressure galvanized steel plates should be used, it shall also meet the zinc coating thickness using a period of time without rust damage requirements. (2) pouring concrete wave groove average width of not less than 50mm. When the tank is set stud connectors, composite slab should not exceed a total height of 80mm. (3) a combination of plate thickness of not less than 90mm; pressure plate above the top surface of a mixture of pure land thickness not less than 50mm. (4) anchor requirement: combination plate ends should be set stud anchor. Peg should be set at the end of the bearing pressure plate concave ribs at penetrating the pressure plate and peg are weld on steel girder. (5) a combination of plate steel sheeting on steel beams bearing length, not less than 50mm. On masonry bearing length of not less than 75mm. Composite slabs performance: save a lot of temporary template. Eliminating all or part of the template support to reduce the amount of concrete. Reduce the structural permanent load, high-rise buildings and earthquake zones more important in the transport, stacking, all save a lot of installation labor. Reduce the workload facilitate the laying of communications, electricity, heating and other pipelines. And may be laying insulation, sound insulation, heat insulation, isolation and other materials. Improve floor performance full of good tensile strength and excellent ductility and concrete compressive strength and greater stiffness of steel. Open floor boards: YX76-305-915, YX76-344-688, YX70-200-600, YX75-200-600, YX75-230-690, YX51-250-750, YX51-305-915, YX51-341 -1025, YX51-253-760, YX76-295-880, YX35-125-750, YX76-313-940