The Minimum Size For An Attic Access Is

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 minimum size for an attic access is.

The 2012 international residential code requires an attic access opening for attics with an area greater than 30 square feet and a vertical height in excess of 30 inches. See the california mechanical code for access requirements where mechanical equipment is located in attics. 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. These specs are per r807 1 of the international residential code irc and the residential edition of the florida building code fbc.

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. The rough framed opening must be a minimum of 22 inches by 30 inches. The vertical height shall be measured from the top of the ceiling framing members to the underside of the roof framing members. For smaller attic openings with a minimum measurement of 18 x 24 you will need to measure the swing clearance inside the attic space.

The rough framed opening. The compact attic ladder requires a minimum height of 28 and minimum depth of 44 inside the attic above and behind the opening. Attic ceiling attic access panel shall be fully attic drop down stair shall be fully interface gasketed and insulated gasketed and insulated energy star does not supersede code requirements mark d. 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.