I am building a Patio Cover, part of the extended Roof from a new Bath House that I am building. I need to span 16 feet from the Bath House (2 Beams), to a Cross Beam that sits atop 2 Steel Posts. The span between the Posts is 14'. I plan to add a cover over the adjacent BBQ Area, that will also rest atop this beam. I am trying to properly Size the GluLam Beams. I will also use Glu Lams to span over the BBQ Area. Is there a Span Chart, or Table that the Common Homeowner can interpret, to determine the Beam Sizes?