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Natural Stone Definitions

U

Ultimate Capacity

The load resisted by a stone anchor at failure. This load must be divided by the factor of safety to determine a safe load, or allowable capacity.

Undercut

Cut so as to present an overhanging part.

Unit

A piece of fabricated cubic or thin dimensional stone.

Urinal Screen

A thin stone panel used as a privacy partition between urinals.

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Created in collaboration with the Natural Stone Institute (NSI).
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Office: 76 State Street, Suite 202, Newburyport, MA 01950

Groveland Yard: 934 Salem Street, Groveland, MA 01834

Millis Yard: 102 Acorn Street, Millis, MA 02054

Yard Hours: Monday - Friday, 7 am - 3 pm / closed weekends and holidays | Email us for curated appointments: yards@stonecurators.com

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Office: 76 State Street, Suite 202, Newburyport, MA 01950
Groveland Yard: 934 Salem Street, Groveland, MA 01834
Millis Yard: 102 Acorn Street, Millis, MA 02054
Yard Hours: Monday – Friday, 7 am – 3 pm
Closed Weekends and Holidays
Email For Curated Appointments: yards@stonecurators.com

BE THE FIRST TO HEAR

News and tips from our blog, plus our recent stone finds.

News and tips from our blog,
plus our recent stone finds.

SUBSCRIBE

Copyright © 2025 Stone Curators. All Rights Reserved
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