When you need a compact, robust run with one extra step over the S2N, the S3N short straight staircase in Craftsmans Pine is a neat fit. The configurator guides you through rise/going, 2R+G and pitch so the layout aligns with Part K principles (≤ 42°).
Layout & sizing
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Straight flight: 4 risers / 3 goings
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Rise per step adjustable 180–220 mm
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Overall width (strings): 600–1000 mm
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Total plan length is calculated live, including nosing overlap and riser thickness
Timber specification
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Strings: 32 mm EdgeLam Engineered Pine
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Treads: 22 mm EdgeLam Pine
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Risers: 12 mm plywood as standard (upgrade to Pine; thickness auto-set by width)
Where it fits best
Ideal for split-level rooms, lofts, mezzanines and platform changes where a short, straight timber staircase is the simplest solution.
Compliance note: On-page checks flag pitch and 2R+G to support Part K principles. Final compliance depends on installed dimensions and site conditions.
Key specs
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Model: S3N — 4 risers / 3 goings
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Rise per step: 180–220 mm
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Width range: 600–1000 mm
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Pitch target: ≤ 42° with 2R+G feedback
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Strings: 32 mm EdgeLam Pine
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Treads: 22 mm EdgeLam Pine
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Risers: 12 mm plywood (Pine upgrade available)





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