All of these factors are critical for ensuring the structural integrity of any timber-based construction project. Example: In the rafter span table below, the highlighted cell (13-0), pointing is 2' x 8' Douglas Tannenbaum rafter, with a grade of 2, spaced 24' apart, can have a maximum span of 13 feet - 0 inches (13-0) if designed for a live load of 20 psf, and dead load of 20 psf. ![]() Additionally, the tables specify the minimum spacing between rafters, as well as the maximum depth that can be safely used in a given application. Tutorial for Understanding Loads and Using Span Tables. The tables also provide information on the minimum number of nails that must be used when connecting the rafter to other components. Depending on the type of timber being used, the span will vary. The tables provide detailed information on the maximum rafter length that can be safely used in a given application. ![]() The Mgp10 Rafter Span Tables are essential for any builder or professional working with timber in Australia. The tables have been developed to make it easier for professionals to accurately determine the span of a rafter – or joist – when building a structure. Also see Using These Tables and five Examples showing how to. For each application, a PDF download is available. These 46 tables are based upon design values for visually graded Southern Pine dimension lumber that became effective June 1, 2013. The tables are based on the Australian Standard AS/NZS 1684-2010, which outlines the structural design of timber members and their connection to other structural components. Tables listing Maximum Spans for Southern Pine joists and rafters are detailed below. ![]() This set of tables is designed to provide builders and other professionals with the necessary information needed to determine the safe span for a rafter – or joist – when used in construction. When it comes to construction and the use of timber in Australia, the Mgp10 Rafter Span Tables are an integral part of the process.
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