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.
Avg size of an attic.
The rough framed opening must be a minimum of 22 inches by 30 inches.
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.
As answer 2 states or suggests average is subjective and relative.
Measure the rough opening in your ceiling both the width and length.
For example if your length is 40 feet and your width is 20 feet then 40 20 800 square feet.
The rough framed opening.
Measure the width of your attic space in feet.
Assume for a moment that a house at 1800 sq.
It s important to understand the opening size you have or will create to ensure you select the correct attic ladder product for your home.
Of living space measures 40 by 45 at the exterior.
Example 20 wide by 50 long attic.
20 x 50 1 000 sq.
To determine the size of your attic multiply the width by the length of the attic floor in feet.
Conversely some homes have smaller openings or hatches.