2x6 Roof Joist Span

Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.

2x6 roof joist span. View joist rafter tables. Also available for the android os. 2 x 12 s are not listed because you can span pretty much whatever you want. As mentioned above a 2 4 spf shed roof rafter can span 11.

An syp rafter can span 11. Table r802 4 1 ceiling joist spans for common lumber species uninhabitable attics without storage live load 10 psf l δ 240. Ceiling joists of the first floor of a two story structure often serve as floor joists for the second floor. For other grades and species and for other loading conditions refer to the awc stjr.

If this is the case with your structure use the floor joist table to determine maximum joist length load. For example in the rafter span table below the highlighted cell in the 40 live load table indicates that 2 x 8 southern yellow pine joists that have a grade of 2 that are spaced 24 apart can have a maximum span of 10 feet 3 inches 10 3 if designing for a live load of 40 lbs ft 2. Span calculator for wood joists and rafters also available for the android os. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.

Although 2 x 4 s are included in the official table they are not listed because it is never advised to use them. Spans for ceiling joists shall be in accordance with tables r802 4 1 and r802 4 2. If you live in an area that requires a shed roof rafter to support a heavy load then an spf rafter can only span 7. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.

Maximum rafter spans for a patio roof. An essential part of planning a patio roof or gazebo project is determining the number size and spacing of rafters beams and posts according to the loads they will carry. This will support a room ceiling that is 10 feet long on one side as in 10 foot by 15 foot or 10 foot by 17 foot rooms which is a standard dimension for many rooms in residential construction. It covers 2 common lumber species and sizes at 20 pounds per square foot load.

This ceiling joist span table is based on the 2012 irc for uninhabitable attics with limited storage. Sixteen inch oc spacing of ceiling joists made from 2 southern pine allows for a maximum 13 inch span length.