Parallel Chord Roof Truss Span Chart

Roof floor truss manual 7 31 08 10 43 am page 12.

Parallel chord roof truss span chart.

Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00. Spacing of trusses are center to center in inches. The shapes and spans shown here represent only a fraction of the millions of designs produced by alpine engineers. Keep in mind that these tables are for estimations only.

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. 72 5 0 mi ni m u m girder floor truss floor truss jacks a a bearing wall girder floor truss floor truss jacks bearing wall cantilevered floor truss two 2x rim joists 24 max. The partial scissor truss is similar except that the bottom chord slopes up in one direction and then straight down while the remaining portion is flat. And parallel to floor truss span strongback lateral supports 24 max.

Alpine truss designs are engineered to meet specific span configuration and load conditions. Maximum deflection is limited by l 360 or l 480 under live load. Parallel chord trusses allow for greater interior clearance in buildings. The truss is a framework consisting of rafters posts and struts which supports your roof.

The important point to keep in mind when you use your truss calculator is that every truss calculation is completely unique and is based on the size of your roof and its specific dimensions. Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91.