Depth Of Residential Floor Truss Spanning 25 0

1 ft 0 3048 m.

Depth of residential floor truss spanning 25 0.

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. Floor truss span chart each individual floor truss design is unique based on multiple variables. Geometry loading spacing bearing conditions etc. Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91.

Maximum floor joist span for no. 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. Dead load weight of structure and fixed loads 10 lbs ft 2. 1 psf lb f ft 2 47 88 n m 2.

Alpine truss designs are engineered to meet specific span configuration and load conditions. Clear spans shown on this chart are presented under the following conditions. True floor joist span calculations can only be made by a structural engineer or contractor. Tcll 40 psf tcll 80 psf tcll 125 psf truss spacing truss spacing truss spacing.

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 in 25 4 mm. Span tables below illustrate common combinations of the multiple variables available.

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. 2 strongback bracing is not considered. 2 grade of douglas fir are indicated below.