Wood Roof Truss Span Tables Fink

The load span tables shown below demonstrate only a tiny subset of the possible combinations available with trussteel cfs roof trusses.

Wood roof truss span tables fink.

Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91. Limited to span in inches divided by 360. Alpine truss designs are engineered to meet specific span configuration and load conditions. Included are a series of representative roof truss span tables that will give you an idea of the truss spans available for a particular load condition load duration lumber type and truss configuration.

In a fink truss the internal joists are arranged in a w shape ensuring even weight distribution from one end to the other. Strength live load of 30 psf plus dead load of 10 psf determines the required bending design value. 05425 cold formed steel trusses roof truss spans every trussteel roof truss is a custom design based upon the unique load span bearing use and code criteria of a particular project. Deflection for 30 psf live load.

These steel joints are needed to support the overall truss. Fink trusses were originally invented for the purpose of beefing up bridges but many contractors now use them to increase the strength of interior structures. Spacing of trusses are center to center in inches. The same thing is true for the bridge of the truss.

Maximum deflection is limited by l 360 or l 480 under live load. Total load psf duration factor live load psf roof type 55 1 15 40 snow shingle 55 1 15 30 snow tile 47 1 15 30 snow shingle 40 1 15 20. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Finally the truss calculator will compute the best dimensional method to connect the pieces of the truss with steel joints and a bridge.

Span tables for jois ts and rafters american wood council 4 span tables for joists and rafters american wood council design criteria. Span calculator for wood joists and rafters also available for the android os. The more complex the truss framework is the greater quantity of these joints will be required. The shapes and spans shown here represent only a fraction of the millions of designs processed by alpine engineers.

Build a fink truss to bolster a floor roof or deck. Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00. They have not been updated for the change in lumber values within the last decade. Common trusses their spans king post span up to 16 queen post fan spans 10 to 22 fink w spans 16 to 33 howe k spans 24 to 36 fan double fan spans 30 to 36 modified queen multi panel spans 32 to 44 double fink ww spans 40 to 60 double howe kk spans 40 to 60 modified fan triple fan spans 44 to 60.