Stair Treads -Stair treads are divided into the following eight kinds by their fixed plate and additional strips and slips.

Stair Treads

Flange/ welding	Fixed by welding	Fixed by flat iron bolts	Fixed by angle iron bolts
No additional checkered plate	CF-21	TG-22	TG-23
No additional checkered plate	CF-24	TG-25	TG-26
Additional anti-slip strips	CF-27	TG-28

Width of stair treads (mm)	185	215	245	275	305
Center distance of hole and slot A (mm)	90	110	140	170	200

CF-21 welding：Fixed by welding、No additional checkered plate	CF-22 welding：Fixed by flat iron bolts、No additional checkered plate

CF-23 welding：Fixed by flat iron bolts、No additional checkered plate	CF-24 welding：Fixed by welding、additional checkered plate

CF-25 welding：Fixed by flat iron bolts、additional checkered plate	CF-26 welding：Fixed by flat iron bolts、additional checkered plate

CF-27 welding：Fixed by welding、Additional anti-slip strips	CF-28 welding：Fixed by flat iron bolts、Additional anti-slip strips