Ibc Attic Access Requirements

Where the access is located in a ceiling minimum unobstructed headroom in the attic space shall be 30 inches 762 mm at some point above the access measured vertically from the bottom of ceiling framing members.

Ibc attic access requirements.

1202 4 under floor ventilation the space between the bottom of the floor joists and the earth under any building except spaces occupied by basements or cellars shall be provided with ventilation in accordance with section 1202. An opening not less than 20 inches by 30 inches 559 mm by 762 mm shall be provided to any attic area having a clear height of over 30 inches 762 mm. See the california mechanical code for access requirements where mechanical equipment is located in attics. Contributes to but does not supersede thermal resistance requirements for attic and roof assemblies in section c402 2 1 of the international energy conservation code.

See section m1305 1 3 for access requirements where mechanical equipment is located in attics. The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process. 2009 ibc commercial construction requirement for attic space access 1209 2 attic spaces.