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.

Spans shown are in feet 4. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. This also reduces the need and cost for extra bearing posts beams and footings. As the name trimjoist indicates our product can be trimmed on the construction site for a custom fit.

Maximum deflection is limited by l 360 or l 480 under live load. Roof floor truss manual 7 31 08 10 43 am page 12. Tcll top chord floor live load 2. Live load deflection is limited to l 360.

Find span carts for open joist products. The maximum span is measured o c. And parallel to floor truss span strongback lateral supports 24 max. 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.

The versatility of the trimjoist is unmatched by any other pre engineered wood joist product. The open web nature of the trimjoist is ideal for plumbing electrical and a c duct work. Of bearings and is based on uniformly loaded joists. Open joist by asc span charts.

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

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

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. No more custom made floor trusses. Floor trusses can span farther between bearing points than i joists allowing for larger open rooms.

Spacing of trusses are center to center in inches.