Calculates and checks simply supported Wood Beams. An excellent tool for field calculations or preliminary structural design. Load options include a uniform load and a point load. Minimum beam depth is determined based on Fv, Fb and deflection criteria. Preset values are provided for Load Duration Factor (Cd) and NDS wood design values for Douglas-Fir #2 and other common species. Presets for engineered wood as well: Glulam, Parallam and Microllam.