Permissible Exposure Limit: PELs are established and enforced by OSHA to protect workers against the health effects of overexposure to hazardous substances.
The abbreviation for Personal Protective Equipment, such as protective clothing, safety toe shoes, helmets, goggles, etc., designed to protect the wearer’s body from injury from exposures in the work environment.
To stack and secure stone units to a pallet for ease, safety, and efficiency in handling and transport.
A term used to describe either a single unit of fabricated stone veneer, or a preassembled panel including multiple stone units affixed to a structural panel framework.
A low wall along the edge of a terrace, roof, or balcony, which is usually simply the extension of the exterior wall below it.
To apply a thin coat of mortar, thin-set, neat cement, or other bonding agent to the back of stone units, or to the face of the backup material, normally for the purpose of reducing the voids, increasing bond strength, or waterproofing. See also back parging and neat cement.
The change in color or texture of the surface of natural stone due to age or exposure to various elements.
A single unit of fabricated stone for use as an exterior paving material.
Stone used as an exterior wearing surface, as in patios, walkways, driveways, etc.
In classical architecture, the support for a column or statue, consisting of a base, dado, and cap.
The gable end of a roof in classical architecture. Located above a horizontal cornice member, it comprises the raking cornices and the tympanum. It is typically triangular, but can also be curved when applied as a decorative element over windows.
Any method of drilling that includes a combination of hammering blows along the longitudinal axis of the bit with rotation of the bit. Also called “hammer” drilling.
One which contains a considerable number of relatively small openings, often called pierced wall or screen wall.
Garden structure formed by two rows of posts or pillars with joists and open framing above, often covered by climbing plants and shading a walkway.
One of the relatively large and ordinarily conspicuous crystals of the earliest generation in a porphyritic igneous rock.
A shallow, engaged pier or column projecting from a wall, only decorative in function.
A tile finish that features softly rounded edges, thus giving the tile a pillowed look.
Below ground-level quarry.
A rustic finish for veneer stone created with a split or chiseled face, and dressed along the stone’s perimeter to produce convex projection. See also rock faced.
See pitch faced.
1. The base block at the junction of the stone base and trim around a door or other opening.
2. The bottom stone block of a column or pedestal.
A stone surface produced by setting a planer blade so deep that it removes stone by spalling rather than by shaving.
Applies to igneous rocks formed beneath the surface of the earth, typically with large crystals owing to the slowness of cooling.
The final filling and finishing of mortar joints that have been raked.
A glossy, highly reflective surface finish that brings out the full color and character of the stone.
A process utilizing abrasives in combination with specific polishing powders and/or chemicals to produce a glossy, highly reflective surface finish on the stone.
Any of the powders or chemicals used in addition to the abrasive machine heads that are used to achieve a polished finish.
A polishing compound that is supplied in a cream or paste consistency.
Small diameter flexible disks with embedded abrasives used with handheld tools or small portable machines for polishing of stone. These pads may be used in combination with compounds, and may be used either wet or dry.
An igneous rock characterized by distinct and contrasting sizes of coarse and fine-grained crystals. Used as a decorative building and/or paving stone.
A porch formed by a roof supported with columns, similar to a temple front.
Any absorbent material (powder, cloth, etc) used in a saturated condition with water or solvent based fluids and applied to a stone surface for the purpose of removing embedded stains.
A composite unit consisting of a structural backing, usually steel or concrete, multiple panels of stone, and necessary anchorage and connection hardware that is built off-site and transported to the construction site for erection.
In stone facades, refers to a bi-material panel consisting of multiple stone face units and a concrete backer panel. The panel is cast off-site, then transported to the construction site for erection.
See expansion joint.
1. A unit or package of ignition devises used to initiate other explosives or blasting agents in the quarry.
2. A liquid coat applied to increase bond strength of a joint sealant.
A thin stone panel between urinals. See urinal screen.
Company or person that quarries and supplies dimension stone to the commercial market.
Any grinding wheel that has convex or concave shapes and can be adapted to a router, hand held grinder, or CNC machine for the purpose of producing a desired shape to a stone edge.
Any stone that is installed in a position outward of the balance of the wall for aesthetic or water control purposes.
The practice of locating mineral deposits of commercial value.
Exceptionally cellular, glassy lava resembling a solid froth.