The Minimum Size For An Attic Access Is

These specs are per r807 1 of the international residential code irc and the residential edition of the florida building code fbc.

The minimum size for an attic access is.

Buildings with combustible ceiling or roof construction shall have an attic access opening to attic areas that exceed 30 square feet 2 8 m2 and have a vertical height of 30 inches 762 mm or greater. Building codes according to the 2006 international residential code r807 1 attic access homes with combustible materials in the ceiling and roof construction must have an access to attic areas that exceeds 30 square feet and with a vertical height of 30 inches or greater. For smaller attic openings with a minimum measurement of 18 x 24 you will need to measure the swing clearance inside the attic space. If the access is located in the ceiling the minimum unobstructed headrom above the opening must be 30 inches measured vertically at some point over the access.

The rough framed opening must be a minimum of 22 inches by 30 inches. The rough framed opening. 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. The vertical height shall be measured from the top of the ceiling framing members to the underside of the roof framing members.

The compact attic ladder requires a minimum height of 28 and minimum depth of 44 inside the attic above and behind the opening. See the california mechanical code for access requirements where mechanical equipment is located in attics. 1 every attic or roof space shall be provided with an access hatch where the attic or roof space a measures not less than i 10 m in area ii 1 000 mm in length or width and. Buildings with combustible ceiling or roof construction shall have an attic access opening to attic areas that exceed 30 square feet 2 8 m2 and have a vertical height of 30 inches 762 mm or greater.