- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 15 Oct 2020
External fire spread, Supplementary guidance to BR 187 incorporating probabilistic and time-based approaches
External fire spread - Supplementary guidance to BR 187 incorporating probabilistic and time-based approaches was published by BRE on 31 May 2016. It was written by Dr Sung-han Koo.
The Information Paper was prepared following revision of BR 187 External fire spread: building separation and boundary distances, when it became apparent the methodology and some of the assumptions used may not be valid for some features in modern buildings. It is intended to provide guidance to engineers who wish to take alternative fire engineering approaches when calculating building separation distance and to help them make judgements about which elements of the design to focus on.
The Paper reviews existing fire compartment temperature calculation methods and presents methodologies for assessing the sensitivity of the parametric approach to variations in fire load, window size and insulation of compartment boundaries. Analyses of how these changes affect building separation distances are summarised.
In addition to the steady state assumption in BR 187, probabilistic and time-based approaches are also considered.
The contents of the paper are:
- Fire models and compartment temperature calculation methods.
- Methods for calculating compartment temperatures.
- Comparison of fire compartment temperature calculation methods.
- Probabilistic and time-based methodologies.
 FRelated articles on Designing Buildings Wiki
- Automatic fire detection and alarm systems, an introductory guide to components and systems BR 510.
- BS 8414-2: Fire performance of external cladding systems.
- Building Research Establishment.
- External fire spread: building separation and boundary distances (BR 187).
- Fire and rescue service.
- Fire compartmentation.
- Fire dampers.
- Fire detection and alarm system.
- Fire performance of external thermal insulation for walls of multistorey buildings, third edition (BR 135).
- Fire protection engineering.
- Fire safety design.
- Fire spread.
- Joint fire code.
- The Regulatory Reform (Fire Safety) Order 2005.
- Understanding the factors affecting flashover of a fire in modern buildings.
- Wet riser.
Featured articles and news
The Edwardians and their houses.
Cut off from civilian life for over 900 years.
Gaining green support from the carbon giants.
Medieval passageways with spiritual, transport and economic purposes.
Organisation receives accreditation from Investors in People.
Click the button to subscribe.
Communicating the right information at the right time.
Materials can take on different properties to control heat and glare.
Challenges in the construction sector and beyond.
Exploring brick and timber construction techniques.
On wheels or on platforms, micro dwellings are popping up everywhere.
Landlords must now comply with new repair regulations.
You can add articles and help improve knowledge in the construction industry.
Ayo Sokale explains the struggles of being neurodiverse.