Roof Sheathing Thickness Code

And for wood structural panel sheathing r803 2 2 allowable spans.

Roof sheathing thickness code. 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. Never attach roof sheathing with staples. 2018 international residential code.

According to 2009 irc table r803 1 minimum thickness of lumber roof sheathing. Minimum thickness of lumber roof sheathing for si. Many code requirements are not inspected. Minimum 270 fb 340 000 e.

On the upcodes website. 8d ring shank nails should be used instead. Allowable spans for lumber floor and roof sheathing a b for si. You would go to table r503 2 1 1 1 to determine minimum nominal panel thickness.

The typical thickness range for sheathing is 3 8 to 3 4 inch. On the upcodes website. Minimum 420 fb 660 000 e. Loads will vary with the.

Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. Contains sections covering roof framing roof sheathing and roof ventilation. Chapter 9 roof assemblies. 1 inch 25 4 mm.

Roof sheathing shall be structural wood panels plywood osb with a minimum five eighths inch thickness grade stamped for use and span. 1 inch 25 4 mm. Sheathing should be a minimum of 19 32 inch thick. 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.

Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick. 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. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.