Perforated-o safety grating stair treads also called stair treads are produced with welded end carrier plates. It includes standard stair treads and stair treads with nosing. It features punched large holes and small buttons, which makes the stair treads usually keep clean and stand better the snowstorm.

Galvanized standard stair treads

Galvanized stair treads with nosing

Stairs treads end carrier plate drawing
| Standard Stair Tread | ||||
|---|---|---|---|---|
| Catalog | Width inches | Material | Span inches | Depth inches |
| SST-5 SST-7 SST-10 SST-12 | 5" 7" 10" 12" | 13 gauge steel | Up to 30 | 1-1/2" |
| 11 gauge steel | 31-48 | 2" | ||
| 0.125" Aluminum | Up to 42 | 2" | ||
| Stairs treads end carrier plate sizes | |||||
|---|---|---|---|---|---|
| Hole Pattern | Nominal Width | A | B | C | D |
| 2 Holes | 5" | 4 15/16" | 1 1/2" | 3/4" | 2" |
| 4 15/16" | 2" | 1" | 2" | ||
| 3 Holes | 7" | 6 15/16" | 1 1/2" | 3/4" | 4" |
| 6 15/16" | 2" | 1" | 4" | ||
| 4 Holes | 10" | 9 15/16" | 1 1/2" | 3/4" | 7" |
| 9 15/16" | 2" | 1" | 7" | ||
| 5 Holes | 12" | 11 15/16" | 1 1/2" | 3/4" | 9" |
| 11 15/16" | 2" | 1" | 9" | ||
Feature:
Application:
Because the stair treads have the large holes and welded end carrier plates , it can often keep the stair clean and ensure the stair stronger. Besides high quality material and surface finish makes the stair resist rust and corrosion. It can be used indoor and industry.

Perforated-o safety grating stair treads

Perforated-o safety grating stair treads used for crossover bridge