"B" - Glossary of Post Frame Industry Terms

A B C D E F G H I J K L M N
O P Q R S T U V W X Y Z

B Exposure - Urban and suburban areas, wooded areas, or other terrain with numerous closely spaced obstructions having the size of single-family dwellings or larger. Exposure B shall be assumed unless the site meets the definition of another type exposure.

Bay - The distance between adjacent mainframe (post-frames) centerlines or primary supporting members along the length of the building, measured parallel to the ridge.

Beam - A structural member, usually horizontal, used for support in a building and subjected to bending loads.

Beam and Column - A structural system consisting of a series of rafter beams supported by columns. Often used in animal "stall" or "grid" barns.

Bearing Block - A dimensional lumber block placed beneath roof trusses, rafters or beams and nailed and/or bolted to a support column to provide extra support for vertical loads.

Bearing Height - Vertical distance between a pre-defined baseline (generally the grade line) and the bearing point of a component.

Bottom Chord - An inclined or horizontal member establishing the bottom of a roof truss.

Bottom Girt (or Splash Boards) - Pressure treated lumber installed at grade line to which the bottom of the building siding is normally installed.

Brace - A piece of structural material, either temporary or permanent, serving to strengthen another member, or to hold the member in place.

Bridging - Structural blocking used to give weak axis stability to floor joists or roof purlins.

Building Code - Regulations established by a recognized agency describing design loads, procedures and construction details for structures. Usually applying to designated political jurisdictions (city, county, state, etc.).

Building Level (or Transit) - A surveyor's instrument in which a telescope is mounted horizontally. Parallel to the ground, it can be used to determine a level point or points.

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