How long mail takes is going to depend on many factors along the way. Many factors, indeed, though with regard to how long does priority mail take, the answer is, not long. In fact, the United States Postal Service says your package or envelope will arrive within two days.
Both the 2009 IRC and the DCA6-09 allow #2 southern pine 2x10s to span 13 feet 1 inch at 24 inches on-center at a design load of 50 psf. That means these joists can span the 12-foot depth of the deck, and the beam can be located at the perimeter. Nine joists will be needed for the 16-foot width.
For example, a 25â span would be 25x12 / 20 = 15â. The width of this beam would be between 1/3 and Â½ the depth. The dimensions of a girder would be the same, but the flange would be thicker.A beam overhang can be a maximum of 3/8 of the supported span.Floors (Decking and Joists) Metal decking with shear studs, 2â deep spans 10â, 3â spans 15â in the direction of the decking ribs.he dimensions of a girder would be the same, but the flange would be thicker. A beam overhang can be a maximum of 3/8 of the supported span. Floors (Decking and Joists) Metal decking with shear studs, 2â deep spans 10â, 3â spans 15â in the direction of the decking ribs.