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无前护板 Wi'thout nosinq

　　T2螺栓固定Bolted fixing 无前护板 ⅧThout nos.ing

　　T3焊接固定Weldedfixng花纹板前护板Checkered plate nosinlg

　　T4螺栓固定Bolted fixing 花纹板前护板Checkered plate nosing