» Geofoam - can be easily cut and shaped on a project site, which further reduces jobsite challenges. Geofoam is available in numerous material types that can be chosen by
the designer for a specific application. Its service life is comparable to other construction materials and it will retain its physical properties under engineered conditions of use.
» Gable The triangular wall beneath the end of a gable roof.
» Gable roof A roof consisting of two oppositely sloping planes that intersect at a level ridge.
» Gable vent A screened, louvered open- ing in a gable, used for exhausting excess heat and humidity from an attic.
» Gage See Gauge.
» Galling Chafing or tearing of one ma- terial against another under extreme pressure.
» Galvanic couple A pair of metals with differing electrochemical potential, between which electrical current will flow if the metals are placed in a conducting medium.
» Galvanic series A list of metals in order of their relative electrochemical potential when immersed in a given conducting medium.
» Galvanized steel Steel with a zinc coat- ing for the purpose of providing protec- tion from corrosion.
» Galvanizing The application of a zinc coating to steel.
» Gambrel A roof shape consisting of two superimposed levels of gable roofs with the lower level at a steeper pitch than the upper.
» Gantt chart A graphic representation of a construction schedule, using a series of horizontal bars representing the duration of various tasks or groups of tasks that make up
the project.
» Gasket A dry, resilient material used to seal a joint between two rigid assemblies by being compressed between them.
» Gauge A measure of the thickness of sheet material. Lower gauge numbers signify thicker sheets; also spelled "gage."
» Gauged brick A brick that has been rubbed on an abrasive stone to reduce it to a trapezoidal shape for use in an arch.
» Gauging plaster A gypsum plaster for- mulated for use in combination with fin- ishing lime in finish coat plaster.
» General contractor A construction en- tity with responsibility for the overall con- duct of a construction project.
» Geotextile A synthetic cloth used be- neath the surface of the ground to stabi- lize soil or promote drainage.
» GFRC See Glass-fiber-reinforced con- crete.
» Girder A horizontal beam that sup- ports other beams; a ver y large beam, especially one that is built up from smaller elements.
» Girt A horizontal beam that supports wall cladding between columns.
» Glass block A hollow masonr y unit made of glass.
» Glass fiber batt A thick, fluffy, nonwo- ven insulating blanket of filaments spun from glass.
» Glass-fiber-reinforced concrete (GFRC) Concrete with a strengthening admixture of short, alkali-resistant glass fibers.
» Glass fire wall Fire-rated glass meeting all of the requirements for use as a fire-resis- tance rated wall assembly; also called fire- resistive glazing.
» Glass mullion system A method of con- structing a large glazed area by stiffening the sheets of glass with perpendicular glass ribs.
» Glaze A glassy finish on a brick or tile; as a verb, to install glass.
» Glazed structural clay facing tile A hollow clay block with glazed faces, usu- ally used for constructing interior parti- tions.
» Glazier One who installs glass.
» Glazier's points Small pieces of metal driven into a wood sash to hold glass in place.
» Glazing The act of installing glass; the transparent material (most often glass) in a glazed opening; as an adjective, refer- ring to materials used in installing glass, for example
"glazing tape."
» Glazing compound Any of several types of mastic used to bed small lights of glass in a frame.
» Glue-laminated wood A wood member made up of a large number of small strips of wood glued together.
» Glulam A short expression for glue- laminated wood.
» Grade A classification of size or quality for an intended purpose; to classify as to size or quality.
» Grade The surface of the ground; to move earth for the purpose of bringing the
surface of the ground to an intended level or profile.
» Grade beam A reinforced concrete beam that transmits the load from a bear- ing wall into spaced foundations such as pile caps or caissons.
» Grain In wood, the direction of the lon- gitudinal axes of the wood fibers or the figure formed by the fibers.
» Granite Igneous rock with visible cr ys- tals of quartz and feldspar.
» Green building Sustainable building; energy-efficient building; See also Sustain- ability.
» Green roof A roof covered with soil and plant materials; eco-roof; vegetated roof. Groove weld A weld made in a groove,
created by beveling or milling the edgesof the mating pieces of metal.
» Ground A strip attached to a wall or ceil- ing to establish the level to which plaster should be applied.
» Grout A high-slump mixture of port-land cement, aggregates, and water, which can be poured or pumped into cavities in concrete or masonr y for the purpose of embedding
reinforcing bars and/or increasing the amount of loadbearing material in a wall; a specially formulated mortarlike material for filling under steel baseplates and around
connections in precast concrete framing; a mortar used to fill joints between ceramic tiles or quarry tiles.
» Gunnable sealant A sealant material that is extruded in liquid or mastic form from a sealant gun.
» Gusset plate A flat steel plate used to connect the members of a truss; a stiff- ener plate.
» Gutter A channel to collect rainwater and snowmelt at the eave of a roof.
» Gypsum An abundant mineral; chemi- cally, hydrous calcium sulfate.
» Gypsum backing board A lower-cost gypsum panel intended for use as an in- terior layer in multilayer constructions of gypsum board.
» Gypsum board An interior facing panel consisting of a gypsum core sandwiched between paper faces. Also called dr ywall, plasterboard.
» Gypsum lath Sheets of gypsum board manufactured specifically for use as a plaster base.
» Gypsum plaster Plaster whose cement- ing substance is calcined gypsum; used almost exclusively for interior finish plaster work.
» Gypsum sheathing panel A water- resistant, gypsum-based sheet material used for exterior sheathing.
