Steel stair treads is stronger than aluminum stair treads, it is also much heavier than aluminum stairs, which is suited in some place requiring a great bearing capacity. Steel stairs is steel grating treads, you can choose galvanized stair treads or stainless steel grating treads. Outdoor steel stairs is usually used as industrial steel stairs, kinds of floor treads, steel step treads. You can also require serrated steel grating for anti slip stair treads. Steel Grating Treads Types Available:T1: Installed by welded fixing, with no nosingT2: Installed by bolted fixing, with no nosingT3: Installed by welded fixing, with plate nosingT4: Installed by bolted fixing, with plate nosingCustom stair treads Finishes Available for galvanized stair treads:UntreatedHot-dipped GalvanizingPowder Coating