Roof Sheathing Thickness Code

Minimum thickness of lumber roof sheathing for si.

Roof sheathing thickness code.

2018 international residential code. One or two h clips will often allow a longer span between roof trusses rafters. 1 inch 25 4 mm. Allowable spans for lumber floor and roof sheathing a b for si.

Loads will vary with the. According to 2009 irc table r803 1 minimum thickness of lumber roof sheathing. Many code requirements are not inspected. 8d ring shank nails should be used instead.

Minimum 270 fb 340 000 e. And for wood structural panel sheathing r803 2 2 allowable spans. Sheathing should be a minimum of 19 32 inch thick. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

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. 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. You would go to table r503 2 1 1 1 to determine minimum nominal panel thickness.

Minimum 420 fb 660 000 e. 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. On the upcodes website.

2018 international residential code. Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick. Never attach roof sheathing with staples. Wednesday june 13 2018.

Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. Sheathing is installed perpendicular to roof trusses. 1 inch 25 4 mm. On the upcodes website.

Contains sections covering roof framing roof sheathing and roof ventilation.