A: The most common grades of posts are #2, #1 and Select Structural. The most readily available grade is #2.
Object id #101
A: Four common post sizes are 6×6, 6×8, 6×10 and 6×12. Pole buildings in the Northwest commonly use Pressure Treated (PT) HEM-FIR wood for posts. These posts are referred to as “solid sawn”. Nail laminated posts made for 2×6 and 2×8 boards are commonly used elsewhere.
A: The most common bay spacings in pole buildings built in the Northwest are 12′-0″ and 10′-0″. Other parts of the U.S. commonly use 4′-0″ and 8′-0″ bay spacings.
A: The most common roof pitches are 3/12 and 4/12. Roof pitch describes the angle of the roof. It is measured by laying out 12″ horizontal and the appropriate number of inches vertical. It is generally accepted that the 4/12 pitch is “prettier” than a 3/12.
A: Corbel block size (width) is affected by truss bearing area. The length of the corbel is affected by snow loading. Corbels are usually 2x boards that are the same width as the post. The area required to support the truss heel will be specified by the truss engineer on the truss drawings. Determine the bearing area of a corbel block by multiplying the width of the corbel by its thickness (Bearing area of a 2 x 6 = 1.5″ x 5.5″ = 8.25 square inches). (more…)
