Maximum Roof Span For 2x4

1 ft 0 3048 m.

Maximum roof span for 2x4. For heavy loads 2x4s can span up to 5. Trusses must be designed for any special loading such as. 2x4f 2000psif 1100psie 1 8x10 2x6f 1750 psi f 950 psi f 1900 psi e 1 8x10. 2 are indicated below.

Maximum and use lumber properties as follows. Spacing your 2 4 shed rafters at 24 on center limits the width of your roof. For light load roofs 24 o c. Spaced sheathing or 1x boards may be reduced slightly.

Also available for the android os. Most roof framing is 24 on center and you can still build sheds up to 14 with 2 4 rafters at 24 on center. Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no. Live load is weight of furniture wind snow and more.

2 4 rafters can span up to 7. 1 psf lb f ft 2 47 88 n m 2. Dead load weight of structure and fixed loads 15 lbs ft 2. 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.

I used your formula backwards to calculate the max psf of a ceiling with 2x4 ceiling joists spanning 12 and spaced 24 o c. Span calculator for wood joists and rafters also available for the android os.