2015 Irc Roof Overhang

The ibc provides options while the irc has only one method of compliance.

2015 irc roof overhang. Cantilevered outlooker method in the photo above it appears that the cantilevered outlooker method was used and that there was a failure of the outlooker connections at the gable end and the first full truss. Exterior walls of wood frame construction shall be designed and constructed in accordance with the provisions of this chapter and figures r602 3 1 and r602 3 2 or in accordance with awc nds. Components of exterior walls shall be fastened in accordance with tables r602 3 1 through r602 3 4. Fasteners for asphalt shingles shall be galvanized steel stainless steel aluminum or copper roofing nails minimum 12 gage 0 105 inch 3 mm shank with a minimum 3 8 inch diameter 10 mm head astm f 1667 of a length to penetrate through the roofing materials and a minimum of 3 4 inch 19 mm into the roof sheathing.

The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures. However a garage located within 2 of the property line is permitted to have a 4 inch roof eave projection. Roof rafters shall be connected to a parallel ceiling joist to form a continuous tie between exterior walls in accordance with figure r804 3 1 1 and table r804 3 1 1 3 ceiling joists shall be connected to the top track of the load bearing wall in accordance with table r804 3 either with the required number of no. Under the irc to maintain continuity of townhouse fire separation walls are generally required to extend above the roof deck except in certain conditions.

Overhang fire protection the international building code ibc and the international residential code irc require projections beyond the wall to be protected based on fire separation distance. Where the roof sheathing is less than 3 4 inch 19 mm thick the. R802 1 5 8 exposure to weather. Still no requirements to have them only how to properly construct them.

Overhangs such as roof eaves and soffits are one element needing protection. Irc section r802 7 1 1 and figure r802 7 1 1 is the wood framed rafter section dealing with cantilevering wood rafters i e. International residential code 2015 irc 2015 part i administrative chapter 1 scope and administration part ii definitions. The roof framing modification factors shall take into consideration the climatological location.

Figure 2 irc gable overhang details figure 3 gable end wind damage gable end overhangs. See section 603 1 of the 2015 iebc which requires that repairs maintain the level of existing fire. Wall sheathing shall be fastened directly to framing members and where placed on the exterior side. 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.