Stair treads is grating for platforms of a staircase, according to the installation, welding generally have two types of fixed and bolt directly welded to the keel, and do not need to add the side treads, relatively economic and durable but easy to disassemble, bolt-on thick treads on both sides need to side, punch a hole in the side panel, installation is a direct bolt-on, reusable recycling. Customers can customize according to their actual needs, can be any type of grating caused by a variety of sizes to meet the appropriate stairs. But the economic point of view, we recommend as far as possible we recommend the size. 
 We can provide different anti-slip front shield with the stepping board, its size can be arbitrarily specified demand. 
 (1) width of 700mm, 800mm, 900mm, minimum width of 600mm. Maximum width of not more than 1200mm. 
 For single people through the stairs, the two inclined beams or between the width of the barrier should not be less than 600mm 
 (2) stairs frequently cross to bear by several people at the same time as the evacuation route or when the ladder width should be increased to 1200mm. 
 (3) stair treads in place should be able to withstand sudden 1.5KN along the load, when width is not greater than 1200mm, the load in the area of ??100mm × 100mm; when larger than the width of 1200mm, 600mm at each team-loading Chende 1.5KN, stair treads span deflection should not exceed 1 / 500. 
 (4) stair treads and bench platform should have good slip resistance. 
 (5) adjacent stair treads up and down the two vertical projection of the lap portion should be not less than 10mm.