Stair Treads
STEEL STAIR TREADS
Each stair tread is supplied with end plates complete with slotted holes for easy installation. As an option Stair Treads can be manufactured without end plates as well.
Typically we will supply the stair tread with a slip resistant pyramid nosing bar. Other types of nosing are available on request.
Standard sizes of our stairtreads are 250mm and 280mm wide x 800mm, 1000mm and 1200mm long. Customized sizes are available on request.
Guideline for Stairs
Stair treads are designed for a simply supported condition when having a single concentrated imposed load of 1.5 KN spread over as area of 150mm x 150mm placed at the center of the edge of a tread.
The maximum recommended deflections are 1/200th of the effective span or 6mm whichever is lesser. Where a staircase is not to BS4592-1:2006 the following will assist you on the staircase flight information. The height (H), length of flight (L) and width (W) of a staircase are the most obvious dimension for constructing stairs.
An anti-slip toe edge nosing has been fitted to the front of the steps. This creates a clear visual distinction between the separate steps, and also increases load capacity. The steps are fitted with welded side plates for mounting to the stair stringers, which are predrilled with the required mounting holes.
Steel Stair Treads
RECOMMENDED WIDTHS (BASED ON 5MM LOAD BARS)(A OR F)
| A TYPE | 130 | 160 | 190 | 220 | 250 | 280 | 310 |
| B TYPE | 122 | 163 | 204 | 245 | 286 | 327 |
LOAD BEARING BAR SIZE AND MAXIMUM LENGTH
| LOAD BAR SIZE | 20X3 | 20X5 | 25X3 | 25X5 | 30X5 |
| A TYPE | 665 | 841 | 944 | 1095 | 1311 |
| B TYPE | 597 | 732 | 846 | 1004 | 1228 |
Stairtreads are designed for a simply supported condition when having a single con-centrated imposed load of 1.5 kN pread over an area of 150 mm x 150 mm placed at the centre of the front edge of a tread.
The maximum recommended deflections is 1/200th of the effective span or 6 mm whichever is lesser.
The maximum recommended deflections is 1/200th of the effective span or 6 mm whichever is lesser.
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