R903 1 Roofing Spacing Plywood

Where roof framing with a specific gravity g 0 49 is used spacing of.

R903 1 roofing spacing plywood. Minimum thickness of lumber roof sheathing. Where roof framing with a specific gravity 0 42 g 0 49 is used spacing of ring shank fasteners shall be permitted at 12 inches 305 mm on center at intermediate framing in nailing zone 1 for any v ult and in nailing zone 2 for v ult less than or equal to 140 mph in accordance with figure r803 2 3 1. Weather exposure for wood shingles shall not exceed those set in table r905 7 5 1. Roof decks shall be covered with approved roof coverings secured to the building or structure in accordance with the provisions of this chapter.

Where the roof sheathing is less than 3 4 inch. Minimum 420 fb 660 000 e. Flashing is not required at hip and ridge. Where flashing is of metal themetalshallbecorrosion resistantwithathickness of not less than provided in table r903 2 1.

1 inch 25 4 mm. Or less roof fastening zone wind main sheathing to gable overhang velocity roof end wall framingg eaves 3 second panel 123 2 3 2 3. Drains or scuppers of section r903 4 1 to be added to an existing roof. Flashings shall be installed at wall and roof intersections wherever there is a change in roof slope or direction and around roof openings.

R908 2 structural and construction loads. Spacing between shingles shall not be less than 1 4 inch to 3 8 inch 6 mm to 10 mm. The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process. Weather exposure for wood shingles shall not exceed those set in table r905 7 5.

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 9 5 mm head complying with astm f1667 of a length to penetrate through the roofing materials and not less than 3 4 inch 19 1 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. Minimum 600fb 1 150 000 e. Minimum 270 fb 340 000 e.

Table 1 roof sheathing fastening schedulea b c d e 8d common 0 131 x 2 1 2 inches or ring shank 0 135 x 2 1 2 inches except where noted for exposure b enclosed buildings roof framing spaced 24 inches o c.