Open Web Floor Truss Span Charts

Floor trusses have built in openings which can be used to install hvac ductwork plumbing lines and electrical wiring.

Open web floor truss span charts.

As the name trimjoist indicates our product can be trimmed on the construction site for a custom fit. Tcll top chord floor live load 2. The maximum span is measured o c. Floor trusses can span farther between bearing points than i joists allowing for larger open rooms.

Maximum deflection is limited by l 360 or l 480 under live load. Roof truss span tables alpine engineered products 15 top chord 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 bottom chord 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2 12 24 24 33 27 27 37 31 31 43 33 33 46 2 5 12 29 29 39 33 33 45 37 38 52 39 40 55 3 12 34 34 46 37 39 53 40 44 60 43 46 64 3 5 12 39 39 53 41 44 61 44 50 65 47 52 70. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Tcdl 10 psf and bcdl 5 psf 3.

Live load l 480 total load l 360 5. Open joist is a revolutionary open web all wood floor truss engineered with superior strength and load carrying capabilities. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Spans shown are in feet 4.

Spacing of trusses are center to center in inches. Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00. Openings are to be located in the center of the span max opening width is 24 inches 7. Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91.

And parallel to floor truss span strongback lateral supports 24 max. No more custom made floor trusses. Dead load deflection is limited to l 360 and total load deflection is limited to l 240. Find span carts for open joist products.

This also reduces the need and cost for extra bearing posts beams and footings. The open web nature of the trimjoist is ideal for plumbing electrical and a c duct work. The versatility of the trimjoist is unmatched by any other pre engineered wood joist product. The minimum bearing length is 1 spans values in bold indicate that web stiffeners are required at the osb end panel.

Roof floor truss manual 7 31 08 10 43 am page 12. Open joist by asc span charts. Trimjoist is the marriage of an open web floor truss and a trimmable wooden i joist bringing the best features of each to the relationship. Of bearings and is based on uniformly loaded joists.

Find out more about load opening charts and requirements for the trimjoist floor truss system.