Approved Document B

Approved Document B
Sodacan · CC BY-SA 3.0 · source
Name	Approved Document B
Subject	Fire safety guidance for buildings in England and Wales
Jurisdiction	England and Wales
Published by	Secretary of State for Housing, Communities and Local Government
First pub	1965
Latest pub	2019 (consolidated)

Approved Document B

Approved Document B is statutory guidance giving practical guidance on meeting the fire safety requirements of the Building Regulations 2010 in England and associated guidance in Wales. It is used by building designers, architects, contractors, fire and rescue services, insurers and local authorities to interpret legal duties and to implement fire safety measures in residential, commercial and public buildings. The document is organized into parts addressing dwellinghouses, flats, and higher risk buildings, and interacts with planning, health and safety, and standards-setting institutions.

Overview

Approved Document B provides prescriptive and performance-based guidance covering means of warning and escape, internal fire spread (linings and structure), external fire spread, and access for firefighting appliances. Practitioners consult the document alongside British Standards such as BS 9999, BS 5839, and BS EN 13501 classifications, as well as guidance from organisations including the Local Government Association, the National Fire Chiefs Council, and the Royal Institute of British Architects. The document sits within the wider regulatory framework that includes acts and statutory instruments administered by the Ministry of Housing, Communities and Local Government and devolved administrations.

Scope and Purpose

The purpose is to set out acceptable solutions and guidance that demonstrate compliance with Requirement B (fire safety) of the Building Regulations. It addresses different building types and uses, specifying measures for escape routes, smoke control, compartmentation, and structural fire resistance. Architects from practices such as Foster and Partners and engineers linked to firms like Arup reference its provisions alongside research from institutions including the Building Research Establishment and advice from professional bodies such as the Chartered Institute of Building and the Royal Institution of Chartered Surveyors.

Structure and Contents

The document is divided into volumes and sections dealing with domestic and non-domestic buildings, and contains diagrams, tables and worked examples. Annexes reference harmonised standards and test methods, including test houses used by UKAS-accredited laboratories and classification systems referencing CEN outputs. Content covers fire detection and alarm systems, emergency lighting, fire resisting construction, and external wall cladding; these subjects intersect with case studies and inquiries involving Grenfell Tower Inquiry-related material and investigations by regulatory bodies.

Regulatory Status and Legal Context

Approved Document B is statutory guidance issued under the powers contained in the Building Act 1984 and associated statutory instruments. While compliance with the guidance is not the only way to achieve legal requirements, adherence provides a recognized route to demonstrate that building work satisfies Requirement B of the Building Regulations. Enforcement involves local authority building control bodies, which operate alongside private inspectors and interacts with enforcement bodies such as the Health and Safety Executive and the Crown Prosecution Service where breaches raise criminal liability. Judicial review and case law from courts, including decisions in the Supreme Court of the United Kingdom, have influenced interpretation.

Key Fire Safety Requirements

Key requirements include provision of suitable means of escape, protected routes and stairways, fire detection and alarm systems graded against occupancy profiles, compartmentation to limit fire spread, and structural fire resistance periods based on building height and use. The document references testing and classifications such as BS EN 1363 fire resistance tests and BS EN 13501-1 reaction-to-fire classes for materials used in façades. Designers coordinate with fire and rescue services, insurers such as Association of British Insurers stakeholders, and standards bodies to ensure measures like sprinklers, smoke control, and hydrant provision meet the expected performance levels.

Application and Compliance

In practice, compliance is achieved through building control approvals, plans submission, and on-site inspection by registered approval bodies or local authority surveyors. Competent persons—chartered professionals accredited by institutions like the Institution of Fire Engineers, the Engineering Council and the Royal Academy of Engineering—produce risk assessments, specifications, and fire strategy reports to support compliance. Complex projects may involve fire engineering solutions documented with calculations and simulations aligned with guidance from the Institute of Fire Safety Managers and peer-reviewed by independent consultancies.

Revisions and Historical Development

First issued in the mid-20th century, the document has evolved through multiple editions reflecting changes after major events and technical developments. Revisions followed inquiries and reports produced by bodies including the Grenfell Tower Inquiry, reviews by the Independent Review of Building Regulations and Fire Safety and legislative responses in the wake of high-profile incidents. Updates have incorporated harmonised European standards and later incorporated guidance addressing external wall systems, insulation materials, and evacuation modelling. Ongoing revision cycles involve consultation with stakeholders such as the National House Building Council, local government representatives, fire services and professional institutions.

Category:Fire safety Category:United Kingdom building regulations