Open Web Floor Truss Span Charts

Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91.

Open web floor truss span charts. The minimum bearing length is 1 spans values in bold indicate that web stiffeners are required at the osb end panel. Open joist by asc span charts. Spacing of trusses are center to center in inches. Find span carts for open joist products.

Floor trusses have built in openings which can be used to install hvac ductwork plumbing lines and electrical wiring. Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00. Live load l 480 total load l 360 5. Tcll top chord floor live load 2.

Dead load deflection is limited to l 360 and total load deflection is limited to l 240. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Find out more about load opening charts and requirements for the trimjoist floor truss system. As the name trimjoist indicates our product can be trimmed on the construction site for a custom fit.

Floor trusses can span farther between bearing points than i joists allowing for larger open rooms. And parallel to floor truss span strongback lateral supports 24 max. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. The maximum span is measured o c.

This also reduces the need and cost for extra bearing posts beams and footings. No more custom made floor trusses. Open joist is a revolutionary open web all wood floor truss engineered with superior strength and load carrying capabilities. The versatility of the trimjoist is unmatched by any other pre engineered wood joist product.

Top and bottom chords braced by structural sheathing 6. Openings are to be located in the center of the span max opening width is 24 inches 7. Maximum deflection is limited by l 360 or l 480 under live load. 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.

Live load deflection is limited to l 360. Roof floor truss manual 7 31 08 10 43 am page 12. Of bearings and is based on uniformly loaded joists. Tcdl 10 psf and bcdl 5 psf 3.

The open web nature of the trimjoist is ideal for plumbing electrical and a c duct work.