1.1本规范规定了住宅用便携式和永久性紧急逃生梯的公认性能要求。 1.2本规范取代临时标准PS 117。 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前咨询并建立适当的安全和健康实践，并确定监管限制的适用性。

1.1 This specification establishes recognized performance requirements for portable and permanent emergency escape ladders for residential use. 1.2 This specification replaces provisional standard PS 117. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.