本标准规定了有关保险柜的规则 设计、施工、测试、维护、安装和使用 由永久安装的金属或木材制成，正在消失 各种类型的阁楼楼梯，设计用于 通往阁楼等上层建筑的通道。家庭单元 额定负载为250磅、300磅和350磅，或商用 额定重量为500磅的装置是唯一涵盖的装置 在本标准中。本标准不适用 到任何其他ANSI A14覆盖的阁楼楼梯 标准，或正在消失的阁楼楼梯 天花板高度超过12英尺时使用。这个标准 还规定了以下方面的规则和最低要求: 设备的安装说明和标签 阁楼楼梯，以促进正常情况下的安全 使用条件。本标准不包括以下要求: 不同建筑可能需要的防火分隔 密码。 该规定不适用于培训、监督或 已建立的安全程序与 代替这个标准。 本文件的目的是帮助提供安全性 通过建立标准来保护生命、肢体和财产 用于设计和安装永久性安装的 正在消失的阁楼楼梯。本标准的目的不是规定所有 正在消失的阁楼楼梯的施工细节。 所施加的限制旨在提供 适当的一般方法和测试。

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.