Galvanized sheet refers to a steel sheet coated with a layer of zinc on the surface. Galvanizing is an economical and effective anti-corrosion method that is often used. about half of the world's zinc production is used in this process. Related product standards list the recommended standard thickness, length, width and allowable deviation of galvanized sheet. The thickness deviation is generally 0.05mm, the length and width deviation is generally 5mm, and the thickness of the plate is generally between 0.4-3.2.
1. Surface condition: The surface condition of galvanized sheet is different due to the different treatment methods in the coating process, such as ordinary spangle, fine spangle, flat spangle, zinc-free spangle, and phosphated surface. German standards also provide for surface grades.
2. The galvanized sheet should have a good appearance, and there must be no defects that are harmful to the use of the product, such as no plating, holes, cracks, scum, excessive plating thickness, scratches, chromic acid dirt, white rust, etc. The composite floor can also be called floor deck, floor slab, floor slab, steel deck, which means that the profiled steel plate is not only used as a permanent template for the concrete floor, but also used as the lower force reinforcement of the floor to participate in the force calculation of the floor. Work together with concrete to form a composite floor.
3. The advantages of combined floor slabs: light weight, high strength, high rigidity, convenient and quick construction,
, Easy to update, and convenient for industrialized production of composite floor construction requirements: (1) The profiled steel plate of the composite floor should be galvanized steel, and the thickness of the galvanized layer should still meet the requirements of not causing rust damage during the service period. (2) The average width of the wave trough for pouring concrete should not be less than 50mm. When stud connectors are set in the groove, the total height of the composite floor should not be greater than 80mm. (3) The thickness of the composite board should not be less than 90mm; the thickness of the concrete above the top surface of the profiled steel plate should not be less than
50mm. (4) Anchorage requirements: stud anchors should be provided at the end of the composite board. The stud should be set at the concave rib of the profiled steel plate of the end support, penetrate the profiled steel plate and weld both the stud and the steel plate to the steel beam. (5) The supporting length of the profiled steel plate in the composite plate on the steel beam shall not be less than 50mm. The length of the support on the masonry should not be less than 75mm.