Depth Of Residential Floor Truss Spanning 25 0

Clear spans shown on this chart are presented under the following conditions.

Depth of residential floor truss spanning 25 0.

The shapes and spans shown here represent only a fraction of the millions of designs produced by alpine engineers. Maximum deflection is limited by l 360 or l 480 under live load. 1 psf lb f ft 2 47 88 n m 2. 3 assumes composite action with a single layer of 3 4 wood sheathing glued and nailed or screwed.

Live load 30 lbs ft 2 1436 n m 2. Live load is weight of furniture wind snow and more. Floor truss span chart each individual floor truss design is unique based on multiple variables. 2 strongback bracing is not considered.

This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on center o c for 2 grade lumber with 10 pounds per square foot of dead load and 40 pounds of live load which is typical of normal residential construction. 1 bearing size varies and is determined by loading conditions truss span and truss spacing. 1 ft 0 3048 m. True floor joist span calculations can only be made by a structural engineer or contractor.

Alpine truss designs are engineered to meet specific span configuration and load conditions. 4 spans are clear. Span tables below illustrate common combinations of the multiple variables available. Total load psf duration factor live load psf roof type 55 1 15 40 snow shingle 55 1 15 30 snow tile 47 30 snow 40 20 snow 1 25 20.

Maximum floor joist span for no. Tcll 40 psf tcll 80 psf tcll 125 psf truss spacing truss spacing truss spacing. 2 grade of douglas fir are indicated below. Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91.