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  1. Headers & Beams : Allowable Load Tables - SFPA - Southern Pine

  2. Beam Capacity Tables - Pacific Lumber Inspection Bureau

  3. Understanding Loads and Using Span Tables - American Wood

  4. Span Tables - Calculate Joist, Rafter and Wood Beam Spans

  5. Wood Beam Span Calculator

  6. Headers & Beams : Size Selection Tables - Southern Pine

  7. Headers and Beams - SFPA - Southern Pine

  8. Wood Structural Design Data - American Wood Council