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| Gnee Steel (tianjin) Co., Ltd |
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Hot dipped Galvanized Grating Stair Treads Staircase with Slip
Resistant Nosing
Stairtreads can be supplied with almost any combination of pitch
size, bearing bar type and section profile.
Each stairtreads is supplied with end plates complete with sloted
holes for easy installation. Or
Typically, we supply the stairtread with a slip resistant checker
plate nosing bar. Other types of nosing are available on request.

Stairtreads:
| Load Bearing Bar Pitch | Recommended Width | ||||||
| 30 | 125 | 155 | 185 | 215 | 245 | 275 | 305 |
| 40 | 125 | 165 | * | 205 | 245 | 285 | 325 |


Steel Bar Grating Specifications:
| No | Item | Description |
| 1 | Bearing bar | 25x3,25x4,30x3,30x4,30x5,32x5,40x5,50x5,.....75x10mm |
| 2 | Bear bar pitch | 12.5, 15, 20, 23.85, 25, 30, 30.16, 30.3, 34.3, 35, 40,41,60mm. US standard: 1"x3/16", 1 1/4"x3/16", 1 1/2"x3/16", 1"x 1/4", 1 1/4"x 1/4", 1 1/2"x 1/4" etc. |
| 3 | Cross bar pitch | 38,50,76,100,101.6mm |
| 4 | Material | Q235,A36,SS304 |
| 5 | Surface treatment | Black, hot dipped galvanising, paint |
| 6 | Standard | China: YB/T 4001.1-2007 |
| USA: ANSI/NAAMM(MBG531-88) | ||
| UK: BS4592-1987 | ||
| Australia: AS1657 |


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