Stair treads are machined from steel grating made of (steel grating is arranged in flat cross a certain distance and rail and welded into the middle of an iron and steel products with a square lattice). The product surface is generally hot galvanized, electro-galvanized. Kind of folding ladder pedal a ladder pedal according to the fixed installation into welded and bolted ladder ladder pedal pedal. Where that is welded and fixed ladder pedal steel lattice panels, bolted ladder pedal steel grating needs to add 65X5mm the flat as plates. According to claim 2 slip ladder ladder pedal pedal can be divided into two kinds of the front fender (checkered or bars) ladder pedal and no front fender. T325 / 30/100 (applicable to Stair Tread width greater than 215mm of not more than 305mm) T255 / 30/100 ((applicable to Stair Tread width greater than 215mm of not more than 305mm) For security reasons, we recommend that customers use ladder pedal with front fender. stair treads of use