![]() ![]() Use on a local area network or other network is not permitted. SPAN TABLES FOR JOISTS AND RAFTERS 3 AMERICAN FOREST & PAPER ASSOCIATION Table 9.1 Required compression perpendicular to grain design values (F c) in pounds per square inch for simple span joists and rafters with uniform load. These span tables for joists and rafters are calculated on the basis of a series of modulus of elasticity (E) and bending design values (Fb). For a volume license the PDF is licensed to the person in which it is assigned. AWC STJR, 2012 Edition, 2012 - SPAN TABLES FOR JOISTS AND RAFTERS SEE ALSO AWC DVJR. Distribution of the PDF is not permitted. The American Wood Council (AWC) is the wood products division of the American. To learn more about framing a floor and general information on floor framing, visit Framing a Floor on . Overview Resources provide a simplified system to determine allowable joist and rafter spans in one- and two-family dwellings, and the companion supplements for tabulating allowable bending and modulus of elasticity design values for visually graded and mechanically graded dimension lumber. Tables listing Maximum Spans for Southern Pine joists and rafters are detailed below. The PDF Download is licensed per individual in which the individual can place on up to four electronic devices for their personal use. To calculate maximum spans on species not shown above, use the Span Calculator or the Span Tables for Joists and Rafters on the American Wood Council website. To calculate maximum joist spans using different design criteria (loading, spacing, grade, etc.) for these species of framing lumber, see the International Residential Code (IRC). Pergola Rafter Spans for 600 mm and 900 mm Spacing and. ![]() 3) For design parameters, refer to figure 6.22, AS1684.2 and 3. Member span is not suitable for rafter spacing greater than 600mm. The above spans are based on American Softwood Lumber standard sizes. Notes: 1) Refer to general notes for information that is relevant for all span tables. Floor Joist Span Table Live Load = 30 PSF, Dead Load = 20 PSF Span tables for visual and mechanical grades of southern pine lumber joists and rafters, and southern pine lumber and glue-laminated timber (glulam) headers, beams and girders. Structural members properly selected using these span tables. For the tables, it has been assumed that the members are in service class 2 conditions (see I.S. Maximum spans are given for members of a particular section size, spacing, strength class, and loading. Floor Joist Span Diagram How to use the Span TablesĮxample: In the joist span table below, the highlighted cell (10-5) indicates that a #2 grade 2" x 8" Douglas Fir joist, spaced 24" apart, can have a maximum span of 10 feet - 5 inches (10-5) if designing for a live load of 40 PSF, a dead load of 10 PSF, and a deflection limit of the total span in inches divided by 360. Southern Forest Products Association Span Tables. Load tables for 44 mm x 100 mm timber wall studs are also included.
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