Stair tread
Hebei Powers Trading Co.,ltd [China] 
Stair Tread
Materials: Stainless steel or carbon steel
Surface treatment: Untreatment, plain or hot dip galvanized.
Type: Plain style steel grating, serrated style steel grating and I bar type steel grating.
Used: Stair tread is widely used inPower factory, chemical plants, oil refineries, steel plants, paper mills, machinery manufacture, cement plants, municipal works, sewage treatment, the pharmaceutical industry, food processing.
Steel Grating Standards:
1) Bearing Bar (Load Bar) Specifications (mm):
The specification of plain type and serrated type bearing bar is 20 x 3 to 100 x6; the specification of I-section type is 25 x 5 x 3, 32 x 5 x 3, 38 x 5 x 3, 40x 5 x 3, 50 x 5 x 3, 50 x 7 x 4, 55 x 7 x 4, 60 x 7 x 4, 65 x 7 x 4, 70 x 7 x 4,
75 x 7 x 4, etc.
75 x 7 x 4, etc.
2) Bearing Bar Pitch (center to center):
12.5, 15, 30, 34, 40, 60mm etc, also be according to client's requirement and 30, 40, 60mm are recommended, America standard is available.
3) Cross Bar Pitch (center to center):
38, 50, 76, 1001 101.6mm etc, also be according to client's requirement and 50, 100mm are recommended, America standard is available.
Other specification is also can be made as your requested.
