Fireblocking

Description

Concealed combustible spaces (between studs, in soffits, at pipe penetrations) must have fireblocking to prevent fire spread through cavities.

Why this exists

Fire travels through hidden cavities faster than through finished rooms; fireblocking compartmentalizes the cavities.

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