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Term Definition
Board Cement. An adhesive used to bond pieces of wood together.  
Board Foot. A unit of lumber volume, a rectangular solid nominally 12" x 12" x 1".  
Board Insulation. Rigid form of plastic foam used as a rigid application insulating surface, commonly of polyurethane.  
Board Knife. A hand tool holding a replaceable blade to sharply score or trim gypsumboard products; a popular brand is a Stanley knife.  
Board Measure. The standard system for the measurement of lumber; see Board Foot.  
Board Rafter. The wooden structural member that makes up the sloping parallel beams used to support a roof.  
Board Saw. A short hand saw with very coarse teeth for cutting gypsumboard for door and window frame openings.  
Board Siding. A type of lumber installed on the exterior walls of a building or structure to act as the finish sheathing.  
Board Sub-Flooring. A wooden member that is installed on floor joists to which the finished floor is fastened.  
Board, Composite. A board that is made of several compressed materials; used for sheathing, wallboard, or as an insulation or acoustical barrier.  
Board, Concrete Finish. Wooden boards placed in the concrete formwork as for liners to provide a wood-pattern finish to the completed reinforced concrete.  
Board, Diving. A narrow platform, often equipped with a spring and raised off the ground by a ladder, attached to the edge of a swimming pool and extending over the water, used to give divers altitude and lift.  
Board, Dock. Heavy timber used in the construction of the raised platform used for the loading and unloading of trucks.  
Board, Ridge. The board against which the tips of rafters are fastened; the top line of a roof; the ridge.  
Board . 1. A flat thin piece of sawn lumber, usually long and narrow; lumber less than 2 inches thick. 2. A group of persons having supervisory, investigatory, or advisory powers. 3. A sheet of insulating material carrying circuit elements and terminals so that it can be inserted in an electronic apparatus. 4. A flat panel of compressed fibers. 5. A flat panel used for posting bulletins or as a chalkboard.  
Boarding In. The process of nailing boards on the outside studding of a house.  
Boatswains Chair. A trapeze-like seat that is slung from rigging to support a worker; a Bosuns Chair.  
BOCA. Building Officials and Code Administrators International, an organization that publishes model building codes.  
Bodega. 1. A wine vault or cellar; a wine shop where wine is drawn from barrels. 2. A storeroom or warehouse.  
Bodied Linseed Oil. Linseed oil that has been thickened by suitable processing with heat or chemicals; bodied oils vary greatly in viscosity; some are little thicker than raw linseed oil; others are almost jelly like.  
Body Coat. Intermediate coat of paint between priming and finishing.  
Body Feed. The continuous addition of small amounts of filter aid during the operation of a diatomaceous earth filter.  
Body. 1. The structural portion of ceramic articles; also refers to the material or mixture from which the article is made. 2. The structural portion of an article covered with ceramic tile. 3. Thickness, consistency, or viscosity of a fluid. 4. See Steel Square.  
Boiled Linseed Oil. Linseed oil to which enough lead, manganese, or cobalt salts have been added to make the oil harden more rapidly when spread in thin coatings; drying properties accentuated by heating oil to 130 to 200° C.  
Boiled Oil. Drying oil treated with driers to shorten the drying time.  
Boiler Bow Off. An outlet on a boiler to permit emptying or discharging of water or sediment in the boiler.  
Boiler Horsepower. Term now seldom used, meaning equivalent to a heating capacity of 33,475 Btu/hr. (983 watts).  
Boiler Plate. Standardized, formulaic, or hackneyed language in a contract.  
Boiler Room. The space provided for a hot water or steam boiler, circulating pumps, and other mechanical and electrical equipment; engine room.  
Boiler, High-Pressure. Boiler furnishing steam at pressures of 15 pounds per square inch gauge or higher (1.05 kg/cm2).  

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