Mesh Ladders / Step Ladders / Steel Ladders / Straight Stairs are the economical stair acesses for H frames. The stair treads are made by 52x26x2.0mm steel oval tube, and the treads are made by mesh plates or punched hole plates or strip plates. They are used for 1219x1930mm H frames or cross lock scaffolding, for 1.83m or 2m scaffold bay.