All of these factors are critical for ensuring the structural integrity of any timber-based construction project. Find the column for your dead load and spacing, and the row for your timber size to find the permissible clear span on slope in metres. Additionally, the tables specify the minimum spacing between rafters, as well as the maximum depth that can be safely used in a given application. 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. 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. 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. Check sources for availability of lumber in lengths greater than 20 feet. For other grades and species and for other loading conditions, refer to the AF&PA Span Tables for Joists and Rafters. These span tables are the equivalent of other industry-standard span tables and are calculated to the same standards. Spans for ceiling joists shall be in accordance with Tables R802.4 (1) and R802.4 (2). These spans were calculated using our flat roof joist calculation engine. This span table is to the format and methodology given in BS 5268-7.2. When it comes to construction and the use of timber in Australia, the Mgp10 Rafter Span Tables are an integral part of the process. Click on a span to generate a full calculation (you can adjust the exact span).
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