Required Attic Access Opening

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 vertical height shall be measured from the top of the ceiling framing members to the underside of the roof framing members. If the attic space is smaller than these specs then an access hatch is not required. The ontario building code access 9 19 2 1.

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The following are attic furnace installation requirements based on 2009 irc and 2009 imc the codes refer to it as appliances in attics.

Required attic access opening.

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. Solutions for the new code requirements r 42 attic access hatch deluxe model with 4 point lock and recessed handleslock and recessed handles also available can be used in kneewalls dl edeluxe e zh t hz hatch mark d. The rough framed opening. But when you put something else in the opening it must be equivalent to 1 2 drywall which has roughly a 20 minute fire resistance.

Attic furnace installation must comply with you local mechanical code or imc international mechanical code if such was adopted in your area. Attic furnace access passageway and platform. The type of attic access determines the means you can install for entrance into the attic. There are several solutions.

The access opening should be located in a hallway or other readily accessible location and minimum 22 x 30. Here s the full text of the code. Attic furnace passageway and service area electrical requirement. Access 1 everyattic 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 iii 600 mm in height over at least the area described in subclauses i and ii or.

The 1 4 plywood panel at most attic ladders does not meet that standard. 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. Most homes have a 1 2 drywall panel installed in the attic access opening which is fine.

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