Roof Diaphragm Nailing Schedule

Chords drag struts collectors shear walls frames boundary member locations.

Roof diaphragm nailing schedule.

Reduce fastener withdrawal capacity unless 3 inch nominal framing is used and the nailing schedule is staggered. Diaphragm boundary all edges of a diaphragm shall be supported by a boundary element. 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. A shear wall however is a vertical cantilevered diaphragm.

A diaphragm is a flat structural unit acting like a deep thin beam. 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. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. Except where noted for exposure b enclosed buildings roof framing spaced 24 inches o c.

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. Ridge vents when the roof sheathing is used as a structural diaphragm as it typically is in high wind and seismic hazard. These construction systems can be used when designing a building for lateral loads such as those generated by wind or earthquakes. In addition the maximum loads for which a blocked diaphragm can be designed are many times greater than those for diaphragms without blocking.

Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. Asce 7 10 section 11 2 diaphragm boundary elements. 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. 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.

Diaphragm and shear wall perimeters interior openings areas of discontinuity re entrant corners. The term diaphragm is usually applied to roofs and floors. Above which increased nailing will not increase capacity. 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.