Normally the stair treads are of same model with the steel grating flooring, sometimes the stair treads may choose higher loading capacity, it depends on the project engineering.
Gloryear have 6 different types of steel gratings stair as below: JT1,JT3&JT5 are welded fixing and JT2, JT4 & JT6 are bolted fixing, you can choose either no nosing, or checkered plate nosing or strip nosing, we also offer yellow abrasive nosing.
The stair tread sizes are normally 600mm, 650mm, 700mm, 750mm, 900mm, 1000mm, width are from 245-300mm depends on grating mesh.
You can contact with Gloryear sales manager for the quotation or technical support.