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2X12 Span Chart

2X12 Span Chart - Use the span tables in the links below to determine the maximum allowable lengths of joists and rafters. Once you find the appropriate table in the book, you determine acceptable fb and e values for your particular span condition. 125% load duration for construction loads. These joists are an excellent choice for floors requiring long spans and high. These deck joist span charts show you exactly how far your joists can span for safe deck construction. The span of a 2×12 floor joist can vary between 16 to 21 feet, depending on spacing, load, and wood species. This table is simply a sample and may not be valid for your region. Span is the distance from face to face of the supports. To calculate the deflection of a. Spfa has created 46 simplified maximum span tables based on common load conditions for floor joists, ceiling joists, and rafters for selected visual and mechanical grades of southern pine.

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