You are still logged in. Click here to logout.
ANSI
Definition:

American National Standards Institute


ASI
Definition:

(Allied Stone Industries)
The Allied Stone Industries is made up of stone quarriers, fabricators, and the suppliers of natural building materials and related machinery and tools.


ASTM International
Definition:

Hand-dressed stone surface showing fineto-course, generally linear toolmarks made by axe, pick or bush hammer.


Abate
Definition:

In stone carving, to cut away material, leaving parts in relief.


Abrasive Finish
Definition:

A non-reflective surface finish. An abrasive finish may be defined by the grit size of the abrasive.


Abrasive Hardness (Ha)
Definition:

A measure of the wearing performance of stone for floors, stair treads, and other areas subjected to abrasion by foot traffic. Refer to ASTM C241 and C1353.


Absorption
Definition:

The amount of water absorbed by a stone, expressed as a percentage by weight. Refer to ASTM C97.


Abutment
Definition:

A solid stone “springer” at the lowest point of an arch or vault.


Accelerator
Definition:

In masonry, any ingredient added to mortar or concrete to speed the curing process.


Acid Wash
Definition:

A treatment applied to the face of a stone to achieve a texture or finish that is distressed.
Most acidic chemical treatments are effective only when applied to calcareous stone varieties.


Adhered
Definition:

Used in reference to stone veneer, secured and supported by adhesion of an approved bonding material over an approved backing.


Admixture
Definition:

A material other than water, aggregates, lime or cement, added to concrete or mortar at the time of mixing. Admixtures are typically added to function as water repellents, coloring agents or to adjust the curing rate of the concrete or mortar.


Adoquin
Definition:

A volcanic, quartz based stone containing a variety of colored aggregates and pumice in a quartz matrix. Quarried in Mexico.


Agate
Definition:

A variegated, translucent, cryptocrystalline variety of quartz showing colored bands or other markings (clouded, mosslike, etc.).


Agglomerated Stone
Definition:

A manmade product composed of crushed stone combined with resin. See also engineered stone and cultured stone.


Aggregate
Definition:

A small mass of rock, having occurred naturally (as in sand or gravel) or by means of manufacture (as in a crushed aggregate product), used either in a loose, noncohesive state, or as an ingredient in mortar or concrete products.

 


Alabaster
Definition:

A fine grained and translucent variety of gypsum, generally white in color. Commonly used in decorative applications as it is can be cut and carved easily with a knife or saw. Term is often incorrectly applied to fine grained marble.


Alkaline
Definition:

Pertains to a highly basic, as opposed to acidic, substance; for example, hydrogen or carbonate of sodium or potassium.


Allowable Capacity
Definition:

The safe load that can be resisted by a stone anchor, determined by dividing the ultimate capacity by the factor of safety.


Ambient Temperature
Definition:

Temperature of the surrounding environment.


Anchor
Definition:

A corrosion resistant metal fastener used for securing dimension stone to a structure or adjacent stone units. Anchor types for stonework include those made of flat stock (straps, dovetails) and round stock (rod cramp, rod anchor, eyebolt and dowel).


Anchorage
Definition:

The means by which slabs are secured to a self supporting structure.


Angle of Repose
Definition:

 The angle a normal pile of loose material makes to the horizontal. Used as an indicator of flowability; the steeper the slope, the more sluggish the flow.

 


Anisotropic
Definition:

Having properties, either visual or mechanical, that differ based on the direction in which they are measured. All stones are anisotropic to some degree, but the sedimentary stones typically have the greatest degree of anisotropy.


Anorthosite
Definition:

A dark-colored igneous rock consisting mostly or entirely of calcic plagioclase.


Antique Finish
Definition:

A finish that replicates rustic or distressed textures. Produced through mechanical or chemical means to simulate the naturally occurring effects of the aging process.


Apex Stone
Definition:

Uppermost stone in a gable, pediment, vault or dome.


Apron
Definition:

A trim piece under a projecting stone top, stool, etc.


Arch
Definition:

The curved or pointed construction over a doorway or opening. Arch shapes range from flat to semicircular or semielliptical to acutely pointed.


Architrave
Definition:

The beam or lowest division of the entablature in the classical orders, spanning from column to column. The decorated surrounds of a window or door at the head and jamb.


Argillite
Definition:

A weakly metamorphosed compact rock composed mainly of clay and shale. Used locally as building stone, although rarely produced commercially.


Arkose
Definition:

A feldspar-rich sandstone containing 10% or more clastic grains of feldspar. Also called “arkosic sandstone” and “feldspathic sandstone.”


Arris
Definition:

A slight, although measurable, chamfer where two surfaces meet


Artificial Stone
Definition:

A manmade product attempting to replicate the look of natural stone. This term is actually a misnomer, as it includes an obvious contradiction of terms. Stone is naturally occurring earth material. See engineered stone and cultured marble.


Ashlar
Definition:

A stone façade of generally square or rectangular units having sawed or dressed beds. There are three generally recognized distinctions:

1. random ashlar: ashlar set with stones of varying length and height so that neither vertical nor horizontal joints are continuous.
2. coursed ashlar: Ashlar set to form continuous horizontal joints.
3. stacked ashlar: Ashlar set to form continuous vertical joints.


Axed Work (British)
Definition:

Hand-dressed stone surface showing fineto-course, generally linear toolmarks made by axe, pick or bush hammer.