Architectural and Engineering Glossary

G

Great Room

The main room of a house of some pretension;usually the room largest in size.

Great Tower

See keep.

Grece

Same as grees.

Grecian Style

A 19th-century term for Greek Revival style.

Greek Cross

A cross with four equal arms.

Greek Key

See fret.

Greek Masonry

See isodomum.

Green Lumber

Lumber which has not been dried or seasoned.

Green Manure

Green herbaceous plants plowed under to benefit the soil.

Green Mortar

Mortar that has set but yet not dried.

Green Room

A lounge near the stage of a theater or concert hall where actors or musicians may rest or receive visitors before or after a performance.

Green Timber

Freshly converted timber that has not been dried in a kiln;has a high moisture content,usually well above 50%.

Greensand

A resin used to oxidize the soluble iron in water and then to filter it out.

Greenstone

A basic igneous rock having a green color due to iron-bearing silicate minerals;quarried and fabricated for structural and decorative dimension stone.

Greensward

Turf,green with grass,usually well-tended.

Gristmill

A mill for grinding grain;in earlier times powered by the wind,a stream,river,or by tidal water.

Grit

A granular abrasive material (e.g.,consisting of particles of aluminum oxide or silicon carbide) which is used to coat cloth,paper,or  wheels for sanding,grinding,or polishing; also used to provide a nonslip finish to a surface.gritblast See sandblast.
 

Grit Trap

Same as catch basin.

Grizzly

A stationary screen or series of equally spaced parallel bars set at an angle;used to remove oversize particles in processing aggregate or similar material.

Grizzly Brick

Same as salmon brick.

Grnd

Abbr.for ground.

Grog

A crushed refractory material such as crushed firebrick or crushed pottery;used in the manufacture of products designed to withstand extreme heat.

Groin

The ridge,edge,or curved line formed by the intersection of the surfaces of two intersecting vaults.

Groin Rib

See groined rib.

Groin Vault

Same as groined vault.

Groined

Having groins.2.Showing the curved lines resulting from the intersection of two semicylinders or arches.

Groined Rib

A rib under the curve of a groin,either to mask the groin or to support it.

Groined Vault,groin Vault

A compound vault in which barrel vaults intersect,forming arrises called groins.

Grommet

A metal or plastic eyelet which provides a reinforced hole for attachment.

Groove

A long narrow cut in the edge or face of a wood member;a groove across the grain is a dado;one parallel with the grain is a plow.

Grotesque

Sculptured or painted ornament involving fanciful distortions of human and animal forms,sometimes combined with plant motifs,esp.a variety of arabesque which has no counterpart in nature.

Grotto

A natural or artificial cave,often decorated with shells or stones and incorporating waterfalls or fountains.

Ground Anchor

A device used to secure a structure from lateral or vertical forces.

Ground Bar

An electrical conductor which forms a common junction for a number of ground conductors.

Ground Beam

1.A groundsill.2.A horizontal heavy timber or reinforced concrete beam at or near ground level for distributing a load which it supports.

Ground Brush

An oval or round paintbrush used for covering large areas.

Ground Bus

A bus to which grounds,3 from individual pieces of equipment are connected; the bus,in turn,is connected to the ground at one or more points.

Ground Casing

The blind casing of a window. 

Ground Coat

1.A first coat of paint or enamel,particularly when designed to show through a topcoat.2.A porcelain enamel applied directly to the base metal to function as an intermediate layer between the metal and the cover coat.
 

Ground Course

The horizontal base course of masonry on the ground.
 

Ground Floor

The floor of a building which is nearest the surrounding surface of the ground;usually the first floor in the US but sometimes a floor between a basement or cellar and the first floor.

Ground Glass

Glass having a surface that has been roughened,usually by sandblasting or by acid,to make it nontransparent.

Ground Joist

A joist which rests on sleepers laid on the ground,stones,or dwarf walls;used in basements or ground floors.

Ground Key Valve

A valve which controls fluid flow in a manner similar to a ground key faucet.

Ground Level

See ground line.

Ground Light

Visible radiation from the sun and sky which is reflected by surfaces below the plane of the horizon.

Ground Line

The level of the surface of the ground,above (or below) which the height of a structure (or depth of excavation) is measured.

Ground Niche

A niche whose base is on a level with the floor.

Ground Plan,ground Plot

The plan of a building taken at ground level.

Ground Plane

The horizontal plane of projection in a perspective drawing;the horizontal plane upon which the object in the drawing rests.