Roof Sheathing Thickness Code

2018 international residential code.

Roof sheathing thickness code.

On the upcodes website. 8d ring shank nails should be used instead. According to 2009 irc table r803 1 minimum thickness of lumber roof sheathing. Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick.

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. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. Many code requirements are not inspected.

You would go to table r503 2 1 1 1 to determine minimum nominal panel thickness. 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. 1 inch 25 4 mm. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

On the upcodes website. Roof sheathing shall be structural wood panels plywood osb with a minimum five eighths inch thickness grade stamped for use and span. 2018 international residential code. The typical thickness range for sheathing is 3 8 to 3 4 inch.

Minimum 420 fb 660 000 e. 1 inch 25 4 mm. And for wood structural panel sheathing r803 2 2 allowable spans. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7.

Contains sections covering roof framing roof sheathing and roof ventilation. Allowable spans for lumber floor and roof sheathing a b for si. Chapter 8 roof ceiling construction. 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 of lumber roof sheathing for si. Never attach roof sheathing with staples. Loads will vary with the.