CIBSE Guide E | Ch. 7 | Eq. 7.3

Required width of the stair

Required width of the stair for simultaneous evacuation

Reference

CIBSE (Chartered Institution of Building Services Engineers), 2019. CIBSE Guide E: Fire Safety Engineering. 4th edn. London: CIBSE.

Equations

w = \frac{P + 15 \cdot n - 15}{150 + 50 \cdot n}