Stair Stringer-9 Step Concrete-In Hot-Dip Galvanised for a Pair (2 Pieces)

Dependable, steel-structured support for a 9-step rise, prepped for concrete-in treads and ready to install as a pair. These hot-dip galvanised stair stringers provide a steady, repeatable framework that suits residential, office, or commercial projects when paired with aluminium or timber treads up to a 1200mm total tread width per pair.

Designed for a 175mm rise and 250mm going, the pair supports typical floor-to-floor layouts and ships with standard configurations for In-Ground, Bolt-On-Concrete, and Landing To Landing footings. Each set is crafted as a pair to ensure consistent strength across both stringers.

Key details

• RHS size: 75mm x 50mm x 2.5mm
• RHS bolt hole: 14mm
• Treads bolt hole: 8mm / slots: 11mm x 18mm
• Rise: 175mm; Going: 250mm
• Treads: 3
• Finishing: Hot-Dip Galvanised
• Sold as a pair; suitable for up to 125mm maximum gap between treads when using 50mm treads

Shipping options available. In‑store pickup available — contact us for pickup location & hours.