(1) Horizontal channels which are installed at the edge of a roof to carry rainwater away from the house. (2) Indentation at the curb of a street, which gathers water.
Guy
Cable, rope, chain, etc. attached to something to steady or guide it, by providing lateral stability.
Guy wire
A strong steel wire or cable strung from an anchor on the roof to any tall slender projection for the purpose of support.
Gyp board
Gypsum sheets covered with paper which are fastened to walls and ceilings with nails or screws.
Gypsum
A hydrated sulfate of calcium occurring naturally in sedimentary rock. In roofing, a type of lightweight deck made from this pulverized rock.
Gypsum block
Building blocks of fire-resistant gypsum, which can be used in non-weight bearing situations.
Gypsum board
Wallboard consisting of layers of gypsum and paper, used in walls and partitions as a substitute for plaster.
Gypsum concrete
Combined mixture of gypsum, water and other aggregates.
Gypsum coreboard
Gypsum panels with V-shaped tongue-and-groove edges, which are one-inch thick and used in solid gypsum partitions.
Gypsum formboard
Gypsum panels that are intended for use as forms for roof decks of gypsum concrete.
