1 Hour Roof Over Hang Protection

Overhangs can be open in which the trusses rafters and decking are exposed see figure 1 or enclosed by a soffit.

1 hour roof over hang protection.

The irc in table r302 1 1 only. The ibc provides options while the irc has only one method of compliance. See attached image we are hoping to replicate this in the addition. However a garage located within 2 of the property line is permitted to have a 4 inch roof eave projection.

Use flat horizontal soffits see figure 3 instead of attaching the soffits to the sloped joists which creates sloped soffits. Hi all we need to provide one hour rated protection for under eaves on a residential property remodel. Overhangs such as roof eaves and soffits are one element needing protection. Roof overhangs must have a one hour fire protection on the underside when less than 5 from the property line and cannot project closer than 2 from the line.

Eave overhang fire protection. Ibc section 703 3 item 2. The existing open eaves have t g sheathing with exposed rafter tails and 2x blocking b w rafters. Wall framing whichever is closer to one of the following.

To an imaginary line between two buildings on the lot. Madesign history contact. Soffits a soffit encloses the underside of sloped or flat roof overhangs. For complete information on the listed systems the actual listing or test report should be reviewed.

1 hour rated wall and protected eave overhang soffit board 1 2 cdx ply 2 x 4 block 2x framing 5 8 type x gypsum sheathing siding 5 8 type x gypsum wallboard structural sheathing as required fascia approved roof covering alternate location of gwb or 2x blocking if no ceiling finish is provided 1900 sw 4th avenue suite 5000 portland or 97201. Enclose overhangs with soffits that have a minimum 1 hour fire resistance rating to prevent embers and hot gases from making contact with the joists rafters or trusses or the underside of the roof decking. To the centerline of a street an alley or public way. To the closest interior lot line.

Walls less than 5 feet from the property lot line must be of a listed hour fire1 resistant construction. Roof ceiling and attic separation.