When you need a slightly longer flight of stairs without switching to a winder or L-shape, the S7N in Craftsmans Pine delivers a stable, compact straight run. Our configurator helps you tune rise, going and pitch in line with Part K principles (target ≤ 42°), shows 2R+G in real time, and calculates total plan length including nosing overlap and riser thickness—so you can check fit before ordering.

Layout & sizing

• Straight flight: 8 risers / 7 goings

• Rise per step adjustable 180–220 mm

• Overall width (strings): 600–1000 mm

• Total plan length calculated live (nosing overlap + riser thickness included)

Timber specification

• Strings: 32 mm EdgeLam Engineered Pine

• Treads: 22 mm EdgeLam Pine

• Risers: 12 mm plywood as standard (upgrade to Pine; thickness auto-set by width)

Where it fits best

A dependable choice for lofts, mezzanines, garage conversions and split-level rooms where a straight timber flight of stairs gives the cleanest layout.

Compliance note: On-page checks flag pitch and 2R+G for guidance. Final compliance depends on installed dimensions and site conditions.

Key specs

• Model: S7N — 8 risers / 7 goings

• Rise per step: 180–220 mm

• Width range: 600–1000 mm

• Pitch target: ≤ 42° with 2R+G feedback

• Strings: 32 mm EdgeLam Pine

• Treads: 22 mm EdgeLam Pine

• Risers: 12 mm plywood (Pine upgrade available)