Roof Sheathing Thickness Code

2018 international residential code.

Roof sheathing thickness code.

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. And for wood structural panel sheathing r803 2 2 allowable spans. Contains sections covering roof framing roof sheathing and roof ventilation. 2018 international residential code.

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. Are h clips required by the building code for roof sheathing. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.

That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. One or two h clips will often allow a longer span between roof trusses rafters. Sheathing is installed perpendicular to roof trusses. Chapter 9 roof assemblies.

Loads will vary with the. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. 1 inch 25 4 mm. Wednesday june 13 2018.

You would go to table r503 2 1 1 1 to determine minimum nominal panel thickness. Many code requirements are not inspected. According to 2009 irc table r803 1 minimum thickness of lumber roof sheathing. Chapter 8 roof ceiling construction.

Sheathing should be a minimum of 19 32 inch thick. Minimum thickness of lumber roof sheathing for si. Minimum 420 fb 660 000 e. On the upcodes website.

8d ring shank nails should be used instead. Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick. Minimum 270 fb 340 000 e. On the upcodes website.

Allowable spans for lumber floor and roof sheathing a b for si.