Stairway illumination

Description

All interior + exterior stairways must have a wall-switch-controlled light at the top and bottom landing. Stairs ≥6 risers also require a switched light midway.

Why this exists

Most home falls happen on stairs. Reachable light switches at both ends prevent the dark-staircase hazard.

Categories

Source

Solver enforcement

Browsable only — the solver does not currently enforce this directive (no spec-level data to check against). This entry exists so the architect personas can cite it in conversation and the user can read what the rule says.

Related directives

• Garage / dwelling fire separation · IRC R302.6
• Habitable space minimum ceiling height · IRC R305.1
• Egress window net opening dimensions · IRC R310.2
• Stair riser, tread, and headroom · IRC R311.7
• Smoke alarms required throughout dwelling · IRC R314