Timber Floor Truss Span Tables

Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 2001.

Timber floor truss span tables. Strength live load of 30 psf plus dead load of 10 psf determines the required bending design value. Maximum deflection is limited by l 360 or l 480 under live load. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Deflection for 30 psf live load.

Spacing of trusses are center to center in inches. Limited to span in inches divided by 360. Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00. Included are a series of representative roof truss span tables that will give you an idea of the truss spans available for a particular load condition load duration lumber type and truss configuration.

Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Roof floor truss manual 7 31 08 10 43 am page 12. Span tables for jois ts and rafters american wood council 4 span tables for joists and rafters american wood council design criteria. View joist rafter tables.

Strongbacks must be installed at mid span to achieve the maximum spans indicated for the vibration criterion in section 9 23 4 3 2 of the national building code of canada nbc. 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. Span tables below illustrate common combinations of the multiple variables available. View allowable load tables.

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Simplified span tables for southern pine lumber and glued laminated timber glulam headers beams and girders. As the name trimjoist indicates our product can be trimmed on the construction site for a custom fit. Keep in mind that these tables are for estimations only.

Tcll 40 psf tcll 80 psf tcll 125 psf truss spacing truss spacing truss spacing. Spacing of trusses are center to center in inches. Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91. Geometry loading spacing bearing conditions etc.

Floor truss span chart each individual floor truss design is unique based on multiple variables. View size selection tables. No more custom made floor trusses. Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00.

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. Maximum deflection is limited by l 360 or l 480 under live load.