Trade Range S9W3N Left-Hand Winder Staircase with Handrails

Built-for-purpose softwood staircase, left-hand winder

This Trade Range S9W3N Left-Hand model adds a complete pine balustrade package and upgrades the riser material to 12 mm plywood. Plywood risers give better screw-holding and long-term stability than MDF while keeping the affordability of a softwood flight. The design turns left at the top and is ideal for tight landings where a straight run won’t fit.

Sizing & layout

• Configuration: Left-hand bottom winder (S9W3N)

• Total rise: 2500–2860 mm across 13 risers

• Typical pitch target: ≤ 42° to align with Building Regulations Part K

• Overall width (strings): usually 660–1000 mm

• Goings: calculated to suit your rise; 2R+G guidance shown during configuration

Materials & details

• Strings: 32 mm EdgeLam Engineered Pine

• Treads: 22 mm MDF

• Risers: 12 mm Plywood (durable upgrade from MDF)

• Newels: 90×90 mm Pine Square

• Balusters: 32 mm Pine Square

• Handrail/Baserail: Pine STHR / STBR profiles

What’s supplied

• Face-side strings tenoned for newels

• Newel posts morticed for strings and handrail

• Handrail & baserail pre-cut

• Balusters pre-cut; fillets supplied oversize for trimming

• Newel caps not included (add from accessories if required)

Compliance & installer notes

The staircase is designed for Part K (England & Wales). Final compliance depends on site conditions (actual rise/going and headroom). Our on-page calculator helps you select a compliant layout and flags pitch, 2R+G and walk-line considerations.

Where it fits best

Home renovations and rental refits that need a left-turning softwood staircase with handrails, quick to assemble and economical to run.