2 By 4 Roof Span Max

Outdoor use all pressure treated lumber this is what i m looking to do.

2 by 4 roof span max.

N deck sheets have valleys that are three inches deep so you can apply them in longer spans. Live load 20 lbs ft 2 956. Dead load will be the actual weight of the roof steel and the roof purlins. 2 4 rafters can span up to 7.

With zero load on horizontal 2x4 s what s the maximum span without zagging when 2x4 s are attached to the front and to the back of two 8 foot tall 4x4 inground cement footings posts. Use two 12 foot 2x4 s attached horizo. Live load is weight of furniture wind snow and more. Span calculator for wood joists and rafters also available for the android os.

Spacing your 2 4 shed rafters at 24 on center limits the width of your roof. Also available for the android os. Span is clear span between supports. 20 psf x 949 1 5 psf x 12 x 949 x 11 625 2 8 x 3 0625 x 1 15 x 1 15 972 75 psi.

1 in 25 4 mm. 1 psf lb f ft 2 47 88 n m 2. 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. 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. For heavy loads 2x4s can span up to 5. Maximum rafter spans for a patio roof. 1 ft 0 3048 m.

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. Joist breadth 47mm. Both n deck and 2 composite sheets are typically 24 inches wide. Supporting imposed load for access and repair only.

2 are indicated below. For heavy roofs or in. Dead load weight of structure and fixed loads 15 lbs ft 2. At least 40mm.

For sake of discussion we will assume a minimal roof snow load of 20 psf pounds per square foot and a 4 12 roof slope. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. 2 40 2 89 3 38 3 87 4 36 2 04 2 75 3 47 4 20 4 93 5 66 floor joists flat roof joists assumptions at 400mm centers supporting permanent load excluding self weight of joists up to 50kg m2.