Roof Sheathing Thickness Code

2018 international residential code.

Roof sheathing thickness code.

2018 international residential code. Never attach roof sheathing with staples. According to 2009 irc table r803 1 minimum thickness of lumber roof sheathing. Minimum thickness of lumber roof sheathing for si.

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. Many code requirements are not inspected. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. The typical thickness range for sheathing is 3 8 to 3 4 inch.

Contains sections covering roof framing roof sheathing and roof ventilation. Sheathing should be a minimum of 19 32 inch thick. On the upcodes website. 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 thickness most roofs will be sheathed in plywood at least 3 8 inch thick. And for wood structural panel sheathing r803 2 2 allowable spans. Allowable spans for lumber floor and roof sheathing a b for si. Secure roof sheathing panels to the roof framing with 8d common nails spaced six inches on center at the edges and twelve inches on center at intermediate supports.

Chapter 9 roof assemblies. On the upcodes website. Minimum 270 fb 340 000 e. Chapter 8 roof ceiling construction.

1 inch 25 4 mm. Roof sheathing shall be structural wood panels plywood osb with a minimum five eighths inch thickness grade stamped for use and span. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. 8d ring shank nails should be used instead.

1 inch 25 4 mm. Loads will vary with the. You would go to table r503 2 1 1 1 to determine minimum nominal panel thickness.