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Staircase dimensions

Risers, treads, stringer length and stair angle.

Significant digits

Unit system

Live construction diagram

Formulas

n=\lceil H/h_t\rceil

h=H/n

m=n-1

b=L/m

s=\sqrt{H^2+L^2}

\alpha=\operatorname{atan2}(H,L)

Risers, treads, stringer length and stair angle.

Roof area, pitch geometry, rafter length and material quantities.