| Customization: | Available |
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| Structure: | Spiral |
| Bench: | Single Stair |
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
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| Item | Recommended maximum stair treads length (mm) | ||
| Bearing bar dimension mm | 25*3 | 25*5 | 32*5 |
| Bearing bar's pitch at 30 mm | 550 | 900 | 1300 |
| Bearing bar's pitch at 40 mm | 450 | 750 | 1200 |
| Item | Recommended stair treads width (mm) | ||||||
| T1/T2/T3/T4 Bearing bar pitch at 30mm |
95 | 125 | 155 | 185 | 215 | 245 | 275 |
| T1/T2 Bearing bar pitch at 40mm T3/T4 |
125 | 165 | 205 | 245 | 285 | ||
| 115 | 155 | 195 | 235 | 275 | |||
| Fixing hole center(mm) | 45 | 75 | 100 | 150 | |||
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