Garage Attic Opening Size

Full size attic ladders usually need an opening in the ceiling that is at least 22 1 2 x 54 inches.

Garage attic opening size.

Basic space requirements for an attic ladder. An attic access opening runs between the ceiling joists whenever possible. Unobstructed headroom of at least 30 inches must be available above the attic opening. If mechanical equipment or appliances are housed in the attic there must be an unobstructed passageway large enough for the removal of the appliance.

The 2007 california building code requires a minimum attic access opening of 20 inches by 30. Measure the rough opening in your ceiling both the width and length. Conversely some homes have smaller openings or hatches. 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.

Standard openings are 22 5 x 54 but some homes have wider openings. Minimum opening size 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. It s important to understand the opening size you have or will create to ensure you select the correct attic ladder product.