Span tables, calculators, design software

• RISA Technologies - offers leading edge structural design and optimization software. The seamless integration of RISAFloor, RISA-3D and RISAFoundation creates a powerful, versatile and intuitive structural design environment, ready to tackle almost any design challenge.
• American Wood Council – Offers span tables as well as online span, connections, areas and heights calculators, and WoodWorks Design Office software.
• APA – The Engineered Wood Association – Includes span tables for APA structural use panels.
• Canadian Wood Council – Offers WoodWorks software for wood design, including seismic and wind loads, structural design and connection details. Software is produced by CWC with technical guidance from the American Wood Council.
• Southern Pine Council – Includes a range of span tables for southern pine joists and rafters.
• Western Wood Products Association – Online Lumber Technical Guide includes Western lumber span tables for common loading conditions for floor and ceiling joists and rafters, with size and repetitive member adjustments built in. WWPA also offers the popular Lumber Design Suite and Lumber DesignEasy programs, which can enhance the lumber specification process. The programs, which work in concert with Microsoft Excel, assist in calculating horizontal framing (beams and joists), vertical framing (posts and studs) and wood-to-wood shear connections.