Board Foot - A unit of measure for lumber equal to 1 inch thick by 12 inches wide by 12 inches long. Examples -

Contractor - A company licensed to perform certain types of construction activities. In most states, the generals contractor's license and some specialty contractor's licenses don't require of compliance with bonding, workmen's compensation and similar regulations. Some of the specialty contractor licenses involve extensive training, testing and/or insurance requirements. There are various types of contractors:

Doorjamb, interior - The surrounding case into which and out of which a door closes and opens. It consists of two upright pieces, called side jambs, and a horizontal head jamb. These 3 jambs have the "door stop" installed on them.

Heat Rough - Work performed by the Heating Contractor after the stairs and interior walls are built. This includes installing all duct work and flue pipes. Sometimes, the furnace and fireplaces are installed at this stage of construction.

Jack rafter - A rafter that spans the distance from the wall plate to a hip, or from a valley to a ridge.

Rough opening - The horizontal and vertical measurement of a window or door opening before drywall or siding is installed.

Shingles, siding - Various kinds of shingles, used over sheathing for exterior wall covering of a structure.

Shingles - Roof covering of asphalt. asbestos, wood, tile, slate, or other material cut to stock lengths, widths, and thickness'.

Short circuit - A situation that occurs when hot and neutral wires come in contact with each other. Fuses and circuit breakers protect against fire that could result from a short.

Siding, (lap siding) - Slightly wedge -shaped boards used as horizontal siding in a lapped pattern over the exterior sheathing. Varies in butt thickness from « to _ inch and in widths up to 12".

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