Roof Trusses Weight Load

Safe load per table 4 1 specifies a 2000 lb over a 2 5ft x 2 5ft area.

Roof trusses weight load.

Don t forget to add all roof assembly materials when calculating total roof weight. The load carrying capacity is handled by larger or higher graded material being used for the truss top and bottom chords as well as the webs. Is a safe estimate. This includes the roof deck and the supporting structure typically roof trusses and or rafters as well as the roof system itself.

This means a 30 foot span is 50 wider than a 20 foot span but must have 225 of the load carrying capacity. If you do not have another floor above the ceiling trusses may only be able to hang a maximum of 10 lbs sqft. The formula for truss loads states that the number of truss members plus three must equal the twice the number of nodes. If the number of members is labeled m and the number of nodes is labeled n this can be written as m 3 2 n.

When it comes to estimating the weight of an existing roof field verification of the in place construction is necessary. Bcll 0 psf no storage available in floor trusses. So if your ceiling is unfinished you have some excess carrying capacity up there. For trusses at 2 ft o c.

In engineering calculations the span of a beam a truss is a beam is squared. The truss is analyzed for each possible location of the 640 plf load along the span. The horizontal bottom chords of most garage trusses are designed to carry the weight of drywall and insulation. If you have another floor above your garage the ceiling floor structure can usually support up to 40 lbs sqft including the weight of the floor above it.

Scrap of plywood over the chords and set about 40 lbs. That means you could lay a 2 x 4 ft. Bcll 0 psf. Of stuff on it.