Minimum 600fb 1 150 000 e.
R903 1 roofing spacing plywood.
Flashings shall be installed at wall and roof intersections wherever there is a change in roof slope or direction and around roof openings.
Where the roof sheathing is less than 3 4 inch.
Minimum 420 fb 660 000 e.
Fasteners for wood shingles shall be corrosion resistant with a minimum penetration of 1 2 inch 13 mm into the sheathing.
1 inch 25 4 mm.
Minimum thickness of lumber roof sheathing.
Spacing between shingles shall not be less than 1 4 inch to 3 8 inch 6 mm to 10 mm.
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.
R908 2 structural and construction loads.
Where roof framing with a specific gravity g 0 49 is used spacing of.
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.
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.
Roof decks shall be covered with approved roof coverings secured to the building or structure in accordance with the provisions of this chapter.
Minimum 270 fb 340 000 e.
Flashing is not required at hip and ridge.
Weather exposure for wood shingles shall not exceed those set in table r905 7 5 1.
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.
Spacing between shingles shall be not less than 1 4 inch to 3 8 inch 6 4 mm to 9 5 mm.
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.
Drains or scuppers of section r903 4 1 to be added to an existing roof.
