1 Hour Roof Overhang Assembly

I am building a cottage with a wall right on my property line and the city wants the eaves to be 1 hour fire resistant.

1 hour roof overhang assembly.

Please help if you know. Overhangs can be open in which the trusses rafters and decking are exposed see figure 1 or enclosed by a soffit. As a result users of the international residential code are looking to the international building code for compliance with the requirement. The roof deck over the eves is 5 8 t g ridwoodi can anyone suggest what i can do at this point to meet this code requirement.

Joined oct 25 2009 messages 10 782 location so. With 1 25 mm type s drywall screws 12 305 mm o c. No minimum joist size is given except that it needs to be adequate for structural loads. Does that mean we don t need an assembly.

The irc in table r302 1 1 only permits the 1 hr fire resistance construction on the underside. Ibc section 722 6 could be used to calculate up to a 1 hour rating for a wood frame wall floor or roof assembly. Table 302 1 states that for projections between 2 and 5 we only need a 1 hour rating on the underside. Please come back again later.

Ibc table 722 6 2 2 allows 10 minutes for wood floor or roof joists at 16 o c. The roof is framed with 2 i 6 joists with a 1 foot protrusion on the side in question. With 1 2 wood structural panels with. An overhang protects the upper portion of the wall that it is attached to from rainfall and it also shades the windows under it from the sun.

Gypsum panel end joints located midway between continuous channels and attached to additional pieces of channels 54 1372 mm long with screws 12 305 mm o c. These listings are short summaries to serve as a. Fire resistance assembly listed for roof eaves. I am constructing an icf house with a sip roof which will overhang the walls.

There is no 1 hr. Wood joists wood i joists floor trusses and flat or pitched roof trusses spaced a maximum 24 o c. 1 2 12 7 mm toughrock fireguard c or 1 2 12 7 mm densarmor plus fireguard c gypsum panel applied perpendicular to resilient channels 24 610 mm o c. On the east side of the house gable side i am within 3 feet of the property line and thus need a 1hr fire rated assembly for the fascia and soffit.

6 usg fire resistant assemblies test certification test conditions and fire and sound tested assemblies listed in this selector are based on characteristics properties and performance certificationof materials and systems obtained under controlled test conditions as set forth in the appropriate astm standard in effect at the time of test. Our site is temporarily disabled. Ibc table 721 3 item 21 1 1 describes a single prescriptive 1 hour rated floor or roof assembly that includes wood trusses. Just a couple 1 2 sheets of gypsum.