2 X8 Roof Purlin Span Table

A yield point of 57 ksi fy was used in determining the values in these tables.

2 x8 roof purlin span table.

My question is can i use 2 x 4 on edge spaced. 2 x 8 1 1 2 x 7 1 4 2 x 10 1 1 2 x 9 1 4 2 x 12 1 1 2 x 11 1 4 4. Span tables for flat roof joists to bs 5268 7 2 imposed loads of 0 75 kn m for maintenance and snow load are applicable where there is no permanent access no fixed ladder or staircase and most areas where the altitude does not exceed 100 metres refer to bs 6399 3. That is exactly what i have double trusses on each side of a post on 12 centers.

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. View joist rafter tables. Can 2 4 roof purlins span 12 feet. These tables can also be used to determine deck joist span.

For special conditions not covered in the tables or for selecting sections for a specifi c application contact your supplier. Maximum rafter spans for a patio roof in areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. For 2x4s purlins the posts are spaced in 4 feet distance. 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. Table 9 2 adjustment factors for alternate loading and spacing conditions for determining required com. Also available for the android os. Reader dave in michigan writes.

For example in the joist span table below the highlighted cell shows that 2 x 8 southern yellow pine joists that have a grade of 2 and 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. Use these two tables for. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Hi i saw on your webpage the pole barn guru stated the trusses could be spaced 12 apart i called and was told it is a double truss one on each side of a post that is on 12 centers.

The standard of purlin length will vary anywhere between 100 to 300 mm while the thickness will vary anywhere between 1 to 3 mm. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. Rafter spans are tabulated for the most common roof loads. The loads are based on adjusted roof snow.