1.Stair treads quality requirements:

(1)Stair treads tolerance: treads length tolerance range [0 - (-3) mm], treads width tolerance range [(-3mm)-3mm]. 
(2)Stair treads welding requirements: welded joints of the former guard and wrapping with each load flat steel is not less than 3mm weld angle.

2.Stair treads types:

(1)According to installation, stair treads can be divided into welding fixing stair treads and bolted fixing stair treads. Welding fixing stair treads is generally steel grating, and bolted fixing stair treads need add 65 × 5mm flat steel to steel grating as side panel. 
(2)Depending on whether there are non-slip can be divided into Nosing (Striped Plate or bar steel) stair treads and non-Nosing stair treads.

3.Stair treads features:

Material savings: most province of the material means withstand the same load conditions, accordingly, can reduce the material of supporting structure.
Reduce investment: saving materials, the provincial labor, the provincial period, free cleaning and maintenance.
Construction simple: clamp bolt or welded fixed on the pre-installed support, one to complete.
Save period: products without on-site re-processing, installation is very quick.
Durable:hot-dip zinc corrosion protection in the factory , appearance, impact resistance and pressure capability.
Structure light: a small timber, the structure light, and easy lifting.
Anti-dirt plot: not plot rain, snow and dust. 
Reducing air resistance: Due to good ventilation, windy wind resistance and reduce wind damage.
Design simple: no small beam, simple structure, designed simplify; without grating design detail, can only indicate the model, our factory can design exclusive board diagram on behalf of clients.