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Frost Line

The depth of frost penetration in soil and/or the depth at which the earth will freeze and swell. This depth varies in different parts of the country. The maximum depth in the earth to which the soil can be expected to freeze during a severe winter.

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Frost Point

The temperature at which frost forms on exposed, chilled surfaces.

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Fuel Contributed

A rating of the amount of combustible material in a coating.

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Furring

Member or means of supporting a finished surfacing material away from the structural wall or framing. Used to level uneven or damaged surfaces or to provide space between substrates. Also an element for mechanical or adhesive attachment of paneling.

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Fuse

- A device often found in older homes designed to prevent overloads in electrical lines. This protects against fire. See also 'circuit breakers'. An overcurrent protection device that opens an electric circuit when the fusible element is broken by heat due to overcurrent passing through it.

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Fusion-Bonded Construction

Carpet formed by bonding pile yearn between two sheets of backing material and cutting the pile yarn in the center, forming two pieces of carpet.

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Furring strips

Strips of wood, often 1 X 2 and used to shim out and provide a level fastening surface for a wall or ceiling.

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Galvanic Corrosion

Corrosion that develops by galvanic action when two dissimilar metals are in contact in the atmosphere.

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Galling

The wearing or abrading of one material against another under extreme pressure.

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Gable

The end, upper, triangular area of a home, beneath the roof. Uppermost portion of the end wall of a building that comes to a triangular point under a sloping roof.

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Gearless Traction Elevator

An elevator with the traction sheave connected to a spur gear that is driven by a worm gear connected to the shaft of the electric motor.

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General Contractor

A contractor who enters into a contract with the owner of a project for the construction of the project and who takes full responsibility for its completion, although the contractor may enter into subcontracts with others for the performance of specific parts or phases of the project.

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Gate valve

A valve that lets you completely stopâ€”but not modulateâ€”the flow within a pipe.

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Gas lateral

The trench or area in the yard where the gas line service is located, or the work of installing the gas service to a home.

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Gang nail plate

A steel plate attached to both sides at each joint of a truss. Sometimes called a fishplate or gusset.

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Glazing

- The process of installing glass, which commonly is secured with glazier's points and glazing compound.

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Glazed Structural Clay Tile

Hollow clay tile products with glazed faces typically used to build interior walls.

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Glass

An inorganic mixture that has been fused at a high temperature and cooled without crystallization.

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Girder

A large or principal beam of wood or steel used to support concentrated loads at isolated points along its length. Beam, especially a long, heavy one; the main beam supporting floor joists or other smaller beams.

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GF C I, or G F I

Ground Fault Circuit Interrupter- an ultra sensitive plug designed to shut off all electric current. Used in bathrooms, kitchens, exterior waterproof outlets, garage outlets, and "wet areas". Has a small reset button on the plug.