This standard prescribes rules for permanently installed metal or wood disappearing attic stairways, used in household or commercial settings.
Content Provider
American Ladder Institute [ali]
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As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.
