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Our company produces complete steel ladders with handrailings, which are made of grating treads. When specifying the steel ladders please refer to the company's standard ladders drawing VGGT-95 and National general standard construction drawing 87J432. According to whether the nosigns to be used and the methods of mounting to stringers, grating treads are classified into four types, expressed as T1, T2, T3 andT4. In view of economics it is advisable to use the recommended lengths and wilths below.

stair treads

stair treads size

stair treads fixed mode
 

　　T1焊接固定 Weldced fixing無前護(hù)板 Wi'thout nosinq

　　T2螺栓固定Bolted fixing 無前護(hù)板 ⅧThout nos.ing

　　T3焊接固定Weldedfixng花紋板前護(hù)板Checkered plate nosinlg

　　T4螺栓固定Bolted fixing 花紋板前護(hù)板Checkered plate nosing