Roof Sheathing Thickness Code

Chapter 8 roof ceiling construction.

Roof sheathing thickness code.

Minimum 420 fb 660 000 e. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. On the upcodes website.

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. Sheathing should be a minimum of 19 32 inch thick. 8d ring shank nails should be used instead. 1 inch 25 4 mm.

2018 international residential code. And for wood structural panel sheathing r803 2 2 allowable spans. Minimum 270 fb 340 000 e. You would go to table r503 2 1 1 1 to determine minimum nominal panel thickness.

Minimum thickness of lumber roof sheathing for si. 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. 2018 international residential code. 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. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. 1 inch 25 4 mm. Many code requirements are not inspected.

Loads will vary with the. 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. Never attach roof sheathing with staples.

Chapter 9 roof assemblies. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. 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.