Garage Attic Opening Size

An attic access opening runs between the ceiling joists whenever possible.

Garage attic opening size.

It s important to understand the opening size you have or will create to ensure you select the correct attic ladder product. Unobstructed headroom of at least 30 inches must be available above the attic opening. 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. Looking for a space adequate to this opening is your first step.

Basic space requirements for an attic ladder. The rough framed opening must be a minimum of 22 inches by 30 inches. Standard openings are 22 5 x 54 but some homes have wider openings. Also make sure there is a suitable landing space in the attic so you can safely mount and dismount the ladder while carrying items.

If mechanical equipment or appliances are housed in the attic there must be an unobstructed passageway large enough for the removal of the appliance. 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.