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.

Maximum deflection is limited by l 360 or l 480 under live load. This also reduces the need and cost for extra bearing posts beams and footings. 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 minimum bearing length is 1 spans values in bold indicate that web stiffeners are required at the osb end panel.

Openings are to be located in the center of the span max opening width is 24 inches 7. The maximum span is measured o c. 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.

Top and bottom chords braced by structural sheathing 6. Live load l 480 total load l 360 5. Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00. Open joist is a revolutionary open web all wood floor truss engineered with superior strength and load carrying capabilities.

Find span carts for open joist products. Of bearings and is based on uniformly loaded joists. Live load deflection is limited to l 360. The open web nature of the trimjoist is ideal for plumbing electrical and a c duct work.

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. 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. Floor trusses can span farther between bearing points than i joists allowing for larger open rooms.

Tcdl 10 psf and bcdl 5 psf 3. Open joist by asc span charts. Roof floor truss manual 7 31 08 10 43 am page 12. 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. Spans shown are in feet 4. Dead load deflection is limited to l 360 and total load deflection is limited to l 240. No more custom made floor trusses.

Tcll top chord floor live load 2.