Open Web Floor Truss Span Charts

You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.

Open web floor truss span charts.

Floor trusses can span farther between bearing points than i joists allowing for larger open rooms. Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00. Of bearings and is based on uniformly loaded joists. Openings are to be located in the center of the span max opening width is 24 inches 7.

Roof floor truss manual 7 31 08 10 43 am page 12. Top and bottom chords braced by structural sheathing 6. The open web nature of the trimjoist is ideal for plumbing electrical and a c duct work. The minimum bearing length is 1 spans values in bold indicate that web stiffeners are required at the osb end panel.

Dead load deflection is limited to l 360 and total load deflection is limited to l 240. Find out more about load opening charts and requirements for the trimjoist floor truss system. Spans shown are in feet 4. 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.

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Tcll top chord floor live load 2. Open joist is a revolutionary open web all wood floor truss engineered with superior strength and load carrying capabilities. 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.

The maximum span is measured o c. Floor trusses have built in openings which can be used to install hvac ductwork plumbing lines and electrical wiring. 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. The versatility of the trimjoist is unmatched by any other pre engineered wood joist product.

Live load l 480 total load l 360 5. Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91. Find span carts for open joist products. This also reduces the need and cost for extra bearing posts beams and footings.

Spacing of trusses are center to center in inches. Live load deflection is limited to l 360. Tcdl 10 psf and bcdl 5 psf 3. Maximum deflection is limited by l 360 or l 480 under live load.

No more custom made floor trusses.