Buildings with combustible ceiling or roof construction shall have an attic access opening to atticareas that exceed 30 square feet 2 8 m2 and that have a vertical height of 30 inches 762 mm or greater over an area of not less than 30 square feet.
Irc attic access.
The 2015 irc requires r 49 insulation for ceilings with attic spaces.
Buildings with combustible ceiling or roof construction shall have an attic access opening to attic areas that have a vertical height of 30 inches 762 mm or greater over an area of not less than 30 square feet 2 8 m 2.
The florida building code fbc and international residential code irc both require a minimum of one attic access opening for homes with combustible such as wood roof construction if the attic space meets these two criteria.
Pa302 1 ceilings with attic spaces n1102 2 1 r402 2 1.
Access doors from conditioned and doors access doors from conditioned spaces to unconditioned spaces g p e g attics and crawl spaces shall be weatherstripped and insulated to a level equivalent to the insulation on the surrounding surfaces.
R807 1 1 attic service access.
Section r807 attic access r807 1 attic access.
Minimum vertical height of 30 inches measured from the top of the ceiling framing members to the bottom of the roof framing members.
The vertical height shall be measured from the top of the ceiling framing members to the underside of the roof framing members.
Wednesday july 4 2018.
2006 irc residential construction.
Attic area exceeds 30 square feet and.
The rough framed opening.
Attics containing appliances or mechanical equipment service shall be accessible by pull down stairs.
R 38 shall be deemed to satisfy the requirement for r 49 wherever the full height of uncompressed r 38 insulation extends over the wall top plate at the eaves.
If no equipment then the basic requirement is 22 by 30 rough framed.
Buildings with combustible ceiling or roof construction shall have an attic access opening to attic areas that exceed 30 square feet 2 8m squared and have a vertical height of 30 inches 762 mm or more.
Kind of confused about the above answers if there is mechanical equipment in attic of house 2003 irc section m1305 1 3 requires an opening that is large enough to allow removal of the largest appliance but not less than 30 inches high and 22 inches wide.
There you ll see that an access opening is all that is specified not stairs.
However there is an exception.
Current international residential code irc 12 13 section r807 attic access.