ALI A14.9-2010

This standard prescribes rules concerning the safe
design, construction, testing, care, installation and use
of permanently installed metal or wood, disappearing
attic stairways of various types designed to be used for
access to upper levels such as attics. Household units
with duty ratings of 250, 300 and 350 lbs., or commercial
units with a rating of 500 lbs. are the only units covered
in this standard. This standard is not intended to apply
to any attic stairway covered in any other ANSI A14
standards, or disappearing attic stairways intended for
use with ceiling heights in excess of 12 feet. This standard
also prescribes rules and minimum requirements for
installation instructions and labeling of disappearing
attic stairways in order to promote safety under normal
conditions of usage.

This standard is not intended to cover requirements for
fire separation that may be required by various building
codes. It does not apply where training, supervision, or
established safety procedures are in conflict with, or
serve in lieu of, this standard.
The purpose of this document is to help provide safety
for life, limb, and property by establishing standards
for the design and installation of permanently installed
disappearing attic stairways.

It is not the purpose of this standard to specify all the
details of construction of disappearing attic stairways.
The limitations imposed are for the purpose of providing
adequate general methods and testing.