Steel grating stair treads are generally produced in what size it? Common treads size T1 to T4 30mm spacing 125,155,185,215,245,275,305 T1 to T2 40mm spacing 125,165,205,245,285,325 T3 to T4 40mm pitch 115, 155,195,235 , 275,315 T1 to T2 60mm spacing 185,245,305 T1 to T2 60mm spacing 155,215,275 from an economic point of view custom ladders pedal, we recommend using the modulus as the width (using 125,155,185 Series 1, 215,245,275, Series 2 using 125,165,205,245,275mm etc.) is a multiple of 100mm length (e.g. 500,600,700,800,900,1000,1200mm etc.). Stair step size is based on the stairwell bay, depth, the height of the pedal steel ladders where? Determine each stair step height and width, length and width of the ladder and platform width settings. (Note: double stair treads on each series is best to take an even stepping Which professional ladders pedal, so that the two ran stepping ladder equal to the number of raw materials and finished product quality certificate pedal steel grating quality certificate steel grating products. quality certificate should indicate the standard number of products, steel grades, model specifications, surface treatment, the appearance and performance test results, batch weight, etc. The quality certificate shall be delivered to the user with the product packing with a single, as a basis for acceptance. If users have a request, can provide the raw material quality assurance. Gangti pedal where?, ladders pedal, Asahi Connaught Anping wire mesh provided by Asahi Connaught Metal Mesh Products Co., Asahi Connaught Anping Wire Mesh Products Co., Ltd. (www.wangpian1688.com) strong, credible, Hebei Hengshui wire mesh industry has accumulated a large number of loyal customers. The company better work attitude and constantly improve the innovative ideas will lead the Asahi Connaught wire mesh and you work into the brilliant, for a better future!