Description: also known as stair treads treads, steel ladder treads, ladder pedal board for a stair platform, its installation of welded joints and bolt connection types. Welded and fixed treads [1] directly to the ladder beam welding, without stepping board plus side, relatively economical and durable but easy to disassemble, fixed treads on both sides of the bolts need thicker side, the side board drill, installation is directly bolted, reusable recycling. Customers can be customized according to their actual needs, using a suitable type of steel grating made into a variety of sizes to match the corresponding stairs. Model: Editing treads type welding fixed: ST1, ST3, ST5 bolts: ST2, ST4, ST6 treads width is usually between 0.5 m to 1 m. Treads mark and tolerance ST4 - (RA325 / 30) in ST4- treads model, RA325 / 30 Steel Grating model treads Tolerance: width W ± 3mm, length L-3mm. Features Purpose Editing: Installation (1) treads a very simple, does not require complicated installation; good (2) ventilation, lighting, cooling, explosion-proof, non-slip performance; (3) the treads of high strength, light structure, durable; (4) maintenance is very simple, against product contamination. Treads very extensive use of the platform in power plants, water plants and other factories, and municipal engineering, environmental engineering and other fields, walkways, theaters, visit the platform, parking lots and other large establishments ground platforms, are widely used. Recommended Width: From an economic point of view, it is recommended as far as possible modulus width (Series 1 using 125,155,185,215,245,275, Series 2 uses 125,165,205,245,275mm etc.) multiples of 100mm length ( As 500,600,700,800,900,1000,1200mm etc.). Stair treads recommended length of the maximum length (mm) flat-sectional dimensions 25 × 3 25 × 5 32 × 5 40 × 5 series 155,090,013,001,600 series 245,075,012,001,500 series 3--5508501350