Steel Stair Stringers are fabricated and hot dipped galvanised with a Rise of 175mm and a Going of 250mm. Stair Stringers are designed to be suitable for residential / domestic / office / commercial applications with a clear span to 17 steps when installed with the use of either aluminium step treads or timber treads to a maximum of 1200mm tread width per pair. For wider tread spans a third central stringer must be used. The standard Stringers are constructed to suit 50mm treads to achieve the maximum gap of 125mm between the treads.
- RHS Size: 75mm X 50mm X 2.5mm
- RHS Bolt Hole: 14mm
- Thread Bolt Hole: 8mm / Slots: 11mm X 18mm
- Rise: 175mm
- Going: 250mm
- Thread: 5
- Finishing: Hot-Dip Galvanised