Description

Stair treads quality requirements:   ï¼ˆ1）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.
 Stair treads models:   According to the Nosing and installation,stair treads is divided into eight kinds of models：
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