Southern Yellow Pine Stair Stringers
Prices from £8.94 inc. VAT
Description
A stair stringer is an inclined member that supports a stairway's treads. A stair stringer may be solid with treads attached to cleats mounted on the inside face, or pre-cut, with treads resting on the top of the cut-outs. Our notched stair stringers are pre-cut for convenience from pressure treated Southern Yellow Pine.
Southern Yellow Pine is an ideal material for stair stringers as it is dense, strong, and the pressure treatment penetrates right through the board making it extremely durable.
Click here to read more about Southern Yellow Pine decking
Prices:
Stringers are available in three sizes:
3 Step - £8.94 (inc. vat) each
4 Step - £11.60 (inc. vat) each
5 Step - £14.32 (inc. vat) each
Specifications:
Rise: 178mm / 7"
Tread: 254mm / 10" (use a pair of 40 x 140mm deck boards for tread)
Note that the load supporting requirements for stair treads are more severe than for the rest of the deck because the force exerted by a person walking down stairs is more intense blow to the surface than a standard stride across a level surface.
The maximum span for a stair stringer is 400mm therefore you will need to install a minimum of four stringers on any stairway wider than 900mm.
It is the best policy to overbuild your stairs because of the increased wear and tear they often receive.
There are four calculations required to build deck stairs:
1. Number of steps
This depends on the vertical drop of the deck. The vertical drop is the distance from the surface of the deck to the ground.
2. Rise
This is the vertical space between the treads. The rise measurement of our stringers is 178mm (7").
3. Run
The run is the depth of the treads. The run measurement of our stringers is 254mm (10") and is designed to take a pair of 140mm deck boards as the tread. Note that there will be an overhang on the front deck board. The step can either be left open or a 25mm deck board can be used to box in the gap.
4. Span
The span enables you to locate the end of the stairway, and position the support posts. The span is calculated by multiplying the run by the number of treads.
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