Open Web Floor Truss Span Charts

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.

Open web floor truss span charts.

Of bearings and is based on uniformly loaded joists. Roof floor truss manual 7 31 08 10 43 am page 12. Spacing of trusses are center to center in inches. 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.

Find span carts for open joist products. No more custom made floor trusses. 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. Live load deflection is limited to l 360.

Tcll top chord floor live load 2. Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00. 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. Openings are to be located in the center of the span max opening width is 24 inches 7.

Floor trusses have built in openings which can be used to install hvac ductwork plumbing lines and electrical wiring. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. The minimum bearing length is 1 spans values in bold indicate that web stiffeners are required at the osb end panel. Live load l 480 total load l 360 5.

Spans shown are in feet 4. The maximum span is measured o c. Find out more about load opening charts and requirements for the trimjoist floor truss system. Maximum deflection is limited by l 360 or l 480 under live load.

Tcdl 10 psf and bcdl 5 psf 3. Dead load deflection is limited to l 360 and total load deflection is limited to l 240. Top and bottom chords braced by structural sheathing 6. 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. Open joist is a revolutionary open web all wood floor truss engineered with superior strength and load carrying capabilities. Open joist by asc span charts. The versatility of the trimjoist is unmatched by any other pre engineered wood joist product.

As the name trimjoist indicates our product can be trimmed on the construction site for a custom fit.