Stone Professionals

ANSI Standards

The American National Standards Institute (ANSI), founded in 1918 by five engineering societies and three government agencies, is a private, not-for-profit organization that administers and coordinates U.S. voluntary standards and conformity assessment acti-vities. The Institute represents the interests of its nearly 1,000 company, organization, government agency, institutional, and international members through its office in New York City, and its headquarters in Washington, D.C.

ANSI currently provides a forum for over 270 ANSI-accredited standards developers representing approximately 200 distinct organizations in the private and public sectors. These groups work cooperatively to develop voluntary national consensus standards and American National Standards (ANS).

The ANSI standardization process provides and promotes standards that withstand scrutiny, yet protect the rights and interests of all participants. This process helps quicken the market acceptance of products, while advising how to improve the safety of those products to protect consumers.

U.S. standards are promoted internationally by ANSI. The organization also advocates U.S. policy and technical positions in international and regional standards organizations, as well as supporting the acceptance of international standards as U.S. standards where they meet the needs of the user community.

The Institute is active internationally with the International Organization for Standardization (ISO), and, via the U.S. National Committee (USNC), the International Electrotechnical Commission (IEC). In many instances, U.S. standards are taken forward to ISO and IEC through ANSI or the USNC, where they are adopted in whole or in part as international standards.

ANSI Specifications and Standards

The following ANSI standards are referenced in the Natural Stone Institute's Dimension Stone Design Manual, VI. To obtain copies of these standards, consult the ANSI website:

ANSI A10.20

Safety Requirements for Ceramic Tile, Terrazzo and Marble Work


Standards for Installation of Ceramic Tile


Specifications for Mortars and Grouts

How to Contact ANSI

American National Standards Institute (ANSI)
25 West 43nd Street, 4th Floor
New York, NY 10036 U.S.A.
Telephone: 212.642.4900
Fax: 212.398.0023


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