Supporting 2x4 Roof Truss Span

Reader dave in michigan writes.

Supporting 2x4 roof truss span.

Just bought a house and wife wants a wall knocked down. 72 24 24 2x4 2. For roofs that will experience heavy snow or wind and will span the same distance use 2 6 rafters. For roofs that won t experience heavy snow loads a gable roof can span up to 22 with 2 4 rafters.

Live load is weight of furniture wind snow and more. We thrue bolted 2x4 sleepers on top of the with 1 2 carriage bolts and fender washers. 1 ft 0 3048 m. Can 2 4 roof purlins span 12 feet.

On another note i have set steel floor trusses i e. Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no. 1 psf lb f ft 2 47 88 n m 2. Dead load weight of structure and fixed loads 15 lbs ft 2.

For a 40 span on a residential job. That is exactly what i have double trusses on each side of a post on 12 centers. They were top cord bearing and hung from the welding plates in the block wall. The span in short is the length of the bottom of the truss.

Trusses must be designed for any special loading such as concentrated loads from hanging partitions or air conditioning units and snow loads caused by driftingnearparapetorslide offfromhigherroofs. Allowable spans for 2x4 top chord trusses using sheathing other than plywood e g. 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. Generally 2x4s can extend for up to 20 feet but a number of issues have to be considered.

Some spans have a lower rate per foot than others. For instance the 2x4 would not noticeably sag under its weight at 10 feet. How far can a 2x4 span. 4 oc 25 5 0 5 psf truss member sizing no ceiling dimensional lumber required.

72 24 30 2x6 2. This is the distance of the bottom chord of the truss from outside overhang of bearing wall to outside of the other bearing wall. 2 are indicated below. 72 24 40 2x6 1.

Factors that affect truss pricing and cost. My question is can i use 2 x 4 on edge spaced. Arguably it will be unlikely for it to stay straight completely all the same. 72 24 36 2x6 1.