Maximum Roof Span For 2x4

Spacing your 2 4 shed rafters at 24 on center limits the width of your roof.

Maximum roof span for 2x4.

Allowable spans for 2x4 top chord trusses using sheathing other than plywood e g. 2 are indicated below. Span calculator for wood joists and rafters also available for the android os. For light load roofs 24 o c.

Most roof framing is 24 on center and you can still build sheds up to 14 with 2 4 rafters at 24 on center. 1 ft 0 3048 m. While every effort has been made to insure the accuracy of the information presented and special effort has been made to assure that the information reflects the state of the art neither the west coast lumber inspection bureau the american wood council nor its members assume any responsibility for any particular design prepared from this online span calculator. For heavy loads 2x4s can span up to 5.

Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no. Dead load weight of structure and fixed loads 15 lbs ft 2. Maximum and use lumber properties as follows. 1 psf lb f ft 2 47 88 n m 2.

Live load is weight of furniture wind snow and more. I used your formula backwards to calculate the max psf of a ceiling with 2x4 ceiling joists spanning 12 and spaced 24 o c. 2 4 rafters can span up to 7. 2x4f 2000psif 1100psie 1 8x10 2x6f 1750 psi f 950 psi f 1900 psi e 1 8x10.

Also available for the android os. Trusses must be designed for any special loading such as.