Lumber Span Tables
A wood plank's maximum span depends on the kind of lumber, or engineered wood (particle board), of the plank. Visit the American Wood Council at http://www.awc.org/technical/spantables/tutorial.htm and find out more about lumber span tables. Each engineered wood floor manufacturer publishes specifications for each product. Check out TrimJoist at http://www.trimjoist.com for information on a hybrid engineered floor joist. As with all engineered wood products, be sure to check for any off-gasing.
Posted by Papaphonic on 9/2/2009
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A tutorial from Paul Fisette on using span tables to size joists and rafters, and the structural principles that govern their use. ... A complete analysis of wood's mechanical properties is complex, but understanding a few basics of lumber strength will allow you to size joists and rafters with the use of span tables.
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A companion Supplement to Span Tables for Joists and Rafters, Design Values for Joists and Rafters tabulates allowable bending stress (Fb) and elastic modulus (E) values for visually graded and mechanically graded dimension lumber.
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Sizing roof rafters, floor joists and beams plus using lumber span tables. ... Lumber Span Tables: Roof Rafters, Floor Joists, Beams ... The first level is titled "General Guidelines" and is for those people that don’t want to have to make any calculations or look up numbers in lumber span tables. The second level is...
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All too often, the limitations and correct use of span tables are not well understood. Span tables are tailored for sizing lumber that is used indoors, where it stays dry and only carries uniform live and dead loads, so if you're building a house, not knowing all the ins-and-outs of span tables isn't an issue.
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Allowable Spans for Girders of Joisted Floors ... Allowable Spans for Floor Joists ... Allowable Spans for Douglas Fir Roof Rafters...
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Southern Pine Span Tables for Joists & Rafters ... Please click on the Table Number below to download the maximum span table of your choice. Also click on Using These Tables. ... Click on Southern Pine Maximum Spans for Joists & Rafters to download the complete publication with explanatory text and all 48 tables.
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Western Wood Products Association ... Welcome to the WWPA Online Lumber Technical Guide ; AFTER LOGGING IN, A NEW TAB WILL APPEAR ENTITLED "TECH GUIDE PAGES". Use this tab to navigate to the many sections the new Online Lumber Technical Guide. The WWPA Online Lumber Technical Guide is available only to registered subscribers.
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Figure provided courtesy of the American Forest & Paper Association; Maximum Span Tables for Joists and Rafters; MSR Lumber for Performance;
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I often get asked by engineers, architects, and designers (and farmers) about the span tables for dimensional lumber. So, I have compiled a list of many places ... Lumber Span Tables: This is a span table for U.S. Spans for Canadian Species from the Strober Organization, Inc. a supplier for contractors in the eastern U.S.
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These span tables (Table 15, Table 16, Table 17, and Table 18) are intended as guidelines to provide the user with an idea of the maximum spans in feet and inches for various wood products with floor loads common in raised floor systems. ... Table 15 Floor Joists — Solid-Sawn Southern Pine Lumber...
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