Roof Sheathing Thickness Code

Sheathing should be a minimum of 19 32 inch thick.

Roof sheathing thickness code.

Minimum 270 fb 340 000 e. 8d ring shank nails should be used instead. Never attach roof sheathing with staples. On the upcodes website.

Chapter 9 roof assemblies. Allowable spans for lumber floor and roof sheathing a b for si. Roof sheathing shall be structural wood panels plywood osb with a minimum five eighths inch thickness grade stamped for use and span. 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.

On the upcodes website. 2018 international residential code. Chapter 8 roof ceiling construction. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.

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. 1 inch 25 4 mm. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. And for wood structural panel sheathing r803 2 2 allowable spans. 1 inch 25 4 mm. Many code requirements are not inspected.

That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. 2018 international residential code. You would go to table r503 2 1 1 1 to determine minimum nominal panel thickness. Contains sections covering roof framing roof sheathing and roof ventilation.

Minimum thickness of lumber roof sheathing for si. Loads will vary with the. Minimum 420 fb 660 000 e.