Roof Diaphragm Nailing Schedule

A diaphragm is a flat structural unit acting like a deep thin beam.

Roof diaphragm nailing schedule.

Chords drag struts collectors shear walls frames boundary member locations. A shear wall however is a vertical cantilevered diaphragm. Except where noted for exposure b enclosed buildings roof framing spaced 24 inches o c. Above which increased nailing will not increase capacity.

Tab shingles need two nails on each side of the tab. In addition the maximum loads for which a blocked diaphragm can be designed are many times greater than those for diaphragms without blocking. 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. These construction systems can be used when designing a building for lateral loads such as those generated by wind or earthquakes.

Ridge vents when the roof sheathing is used as a structural diaphragm as it typically is in high wind and seismic hazard areas the structural integrity of the diaphragm can be compromised by a continuous vent see figure below left. 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 gust locationi fastening schedule inches on center supported panel 666 6 6 150 mphf g end and edges 3h panel field 6. Roof and wall sheathing 8 10d every 4 6 on the seams and 8 12 in the field shingles six roofing nails or staples per shingle. For the same nail spacing design loads on a blocked dia phragm are from 1 1 2 to 2 times design loads of its unblocked counterpart.

Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. Asce 7 10 section 11 2 diaphragm boundary elements. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. Ridge vents when the roof sheathing is used as a structural diaphragm as it typically is in high wind and seismic hazard.

Diaphragm and shear wall perimeters interior openings areas of discontinuity re entrant corners. Diaphragm boundary all edges of a diaphragm shall be supported by a boundary element. 1 inch 25 4 mm. 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.