Roof Sheathing Thickness Code

Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

Roof sheathing thickness code.

Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. 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. 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. On the upcodes website. 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.

According to 2009 irc table r803 1 minimum thickness of lumber roof sheathing. And for wood structural panel sheathing r803 2 2 allowable spans. Minimum 270 fb 340 000 e. Minimum 420 fb 660 000 e.

Minimum thickness of lumber roof sheathing for si. Chapter 8 roof ceiling construction. Sheathing should be a minimum of 19 32 inch thick. 2018 international residential code.

1 inch 25 4 mm. Contains sections covering roof framing roof sheathing and roof ventilation. 8d ring shank nails should be used instead. Roof sheathing shall be structural wood panels plywood osb with a minimum five eighths inch thickness grade stamped for use and span.

Allowable spans for lumber floor and roof sheathing a b for si. Never attach roof sheathing with staples. 1 inch 25 4 mm. Loads will vary with the.

Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick. 2018 international residential code. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.