Term | Definition |
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Gable | Uppermost portion of the end wall of a building that comes to a triangular point under a sloping roof. |
Galling | The wearing or abrading of one material against another under extreme pressure. |
Galvanic Corrosion | Corrosion that develops by galvanic action when two dissimilar metals are in contact in the atmosphere. |
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. |
Girder | Beam, especially a long, heavy one; the main beam supporting floor joists or other smaller beams. |
Glass | An inorganic mixture that has been fused at a high temperature and cooled without crystallization. |
Glazed Structural Clay Tile | Hollow clay tile products with glazed faces typically used to build interior walls. |
Glue Laminated Lumber (Glulam) | A structural wood member made by bonding together laminations of dimension lumber. |
Glues | Bonding agents made from animal and vegetable products. |
Grade | 1. Related to soil, the elevation or slope of the ground. 2. In relation to lumber, a means of classifying lumber or other wood products based on specified quality characteristics. |
Grade Beam | A ground-level reinforced structural member that supports the exterior wall of a structure and bears directly upon columns or piers. |
Grade Level | The elevation of the soil at a specific location. |
Grade Mark | A stamp on a product, such as wood, plywood, or steel, indicating the product's capacity. |
Gradient | The rate of slope between two points on a surface, determined by dividing their difference in elevation by their distance apart. |
Grading | Adjusting the level of the ground on a site. |
Grading | The modification of earth to create landforms. |
Gravel | Hard rock material in particles larger than 1/4 inch (6.4 mm) in diameter but smaller than 3 inches (76 mm). |
Green Lumber | Lumber having a moisture content more than 19 percent. |
Greenbelt | A belt-like area around a city, reserved by ordinance for parkland, farms, open space, etc. |
Greenhouse Effect | The direct gain of solar heat, generally through south-facing glass walls and roofs. |
Grille | An open gate used to cover, conceal, protect, or decorate an opening. |
Ground | A conducting connection between an electrical circuit and the earth or a conducting body that serves in place of the earth. |
Ground-Fault Circuit Interrupter | A device providing protection from electric shock by de-energizing a circuit within an established period of time when the current to ground exceeds a predetermined value that is less than that needed to activate a standard overcurrent protective device. |
Groundwater | Water that exists below the surface of the earth and passes through the subsoil. |
Groundwater Level | The plane below which the soil is saturated with water. Also called Groundwater Table or Water Table. |
Grout | A viscous mixture of Portland cement, water, and aggregate used to fill cavities in concrete. Also refers to a specially formulated mortar used to fill under the baseplates of steel columns and in connection in precast concrete. |
Gusset | Wood or metal plate riveted, bolted, glued or pressed (wood trusses) over joints to transfer stresses between connected members. |
Gypsum | Hydrous calcium sulfate. |
Gypsum Backerboard | A gypsum panel used as the base on which to bond tile or gypsum wallboard. |
Gypsum Board | A gypsum panel used as the base on which to bond tile or gypsum wallboard. |
Gypsum Lath | A panel having a gypsum core and a paper covering providing a bonding surface for plaster. |
Gypsum Plaster | Ground gypsum that has been calcined and mixed with additives to control setting time and working qualities. |
Gypsum Sheathing | A gypsum panel with a water-repellent core. Used for sheathing exterior walls. |