A simple framework for setting risk tolerability limits is proposed following a literature review of risk acceptance in fire safety engineering and a feedback round with international fire safety professionals. The framework provides practical guidance for the application of international fire safety guidance, such as the recently published UK guidance document on probabilistic risk assessment for the fire design of buildings, PD 7974-7:2019, which provides a state-of-the-art framework to assess adequate safety for complex fire engineering designs. However, the application of this guidance document is hindered by two main constraints: (1) PD7974-7:2019 requires risk tolerability limits to be set, but lacks guidance on defining them for a specific building project, and (2) no reference case studies are given that demonstrate the application of PRA methods to fire engineering design. In order to help fill this gap, a risk tolerability framework is developed and proposed herein. Finally, it is applied to a reference case study of a UK office building. Considering the developed framework, further research needs are identified. It is expected that the proposed risk tolerability framework and the presented reference case study can support the application of PRA to fire engineering design and ease stakeholder communication on setting risk tolerability limits.

在对消防安全工程中的风险接受进行文献综述并与国际消防安全专业人员进行反馈后，提出了一个设置风险承受力限值的简单框架。该框架为应用国际消防安全指南提供了实用指南，例如最近发布的英国《关于建筑物消防设计的概率风险评估的指南文件》 PD 7974-7：2019，该文件提供了最新技术评估复杂消防工程设计的足够安全性的框架。但是，该指导文件的应用受到两个主要限制：（1）PD7974-7：2019要求设置风险承受能力限制，但缺乏针对特定建筑项目定义风险承受能力的指导，（2）没有给出参考案例研究来证明PRA方法在消防工程设计中的应用。为了帮助填补这一空白，本文开发并提出了风险承受力框架。最后，将其应用于英国办公楼的参考案例研究。考虑到已开发的框架，确定了进一步的研究需求。预计拟议的风险承受力框架和提出的参考案例研究可以支持PRA在消防工程设计中的应用，并简化与利益相关者在设定风险承受力限值方面的沟通。确定了进一步的研究需求。预计拟议的风险承受力框架和提出的参考案例研究可以支持PRA在消防工程设计中的应用，并简化与利益相关者在设定风险承受力限值方面的沟通。确定了进一步的研究需求。预计拟议的风险承受力框架和提出的参考案例研究可以支持PRA在消防工程设计中的应用，并简化与利益相关者在设定风险承受力限值方面的沟通。