National Building Granit Quarries Association Inc.
Definitions of Trade Terms

Arris: The sharp edge or exterior corner formed by the meeting of two surfaces, whether plane or curved.

Bed: a) The top or bottom horizontal surface of a piece, which is covered when the piece is set in place.b) A filled or open space extending horizontally between adjacent pieces set in place.

Face: The exposed major surface of the granite piece with its specified finish.

Head: The exposed surface of the jointed end of any given piece whose gauged dimension is not more than the minimum thickness of the material specified.

Joint: a) The end or side surface of a piece which is covered when the piece is set in place.b) A filled or open space extending vertically between adjacent pieces set in place.

Kerf: Slot cut into edge of granite piece with saw blade for insertion of anchor.

Quirk Miter: The right angle exposure from the face of the jointed edge whose dimension is a recommended minimum of 1/4". Polished finish on the quirk miter when the face is polished; honed when the face is honed; and diamond finish when the face is thermal.

Rebated Kirf: Additional cut that countersinks kerf from back edge of kerf to back edge of granite piece for the purpose of additional anchor clearance. This is not a gauged cut and if used for a bearing surface, must be shimmed to allow for tolerance in cut.

Seam: A crack or fissure in a rough quarry block.

Start: The beginning of a crack, caused by quarrying, fabrication or handling.
 
 
2014
Specifications for Architectural Granite Brochure
Specifications for Architectural Granite Brochure
(click to view pdf)