by Morgan Hurley, P.E., SFPE(http://www.sfpe.org)Last updated: 06-02-2009

Fire protection engineers use science and technology to protect people and property from fire. When designing new buildings or renovations to existing buildings,fire protection engineers develop the plan for fire protection(fire_protection.php).

Fire protection engineering has evolved significantly over the past several centuries. Early application of fire protection engineering was intended to preventconflagrations, which could destroy entire cities. Until the early 1900s, the primary objective of fire protection engineering was to limit a fire to its building of origin.As fire protection engineering advanced, this objective was refined to limit a fire to its object or room of origin.

However, it wasn't until the later part of the 20th century that fire protection engineering had matured to the point that it included the fundamental tenets of adistinct, professional discipline (Lucht, 1989).

A. Professional DefinitionFire protection engineering is the application of science and engineering principles to protect people and their environment from destructive fire, which includes:

analysis of fire hazardsmitigation of fire damage by proper design, construction, arrangement, and use of buildingsmaterials, structures, industrial processes, and transportation systemsthe design, installation and maintenance of fire detection and suppression and communication systems, andpost/fire investigation and analysis.

A fire protection engineer by education, training, and experience:

is familiar with the nature and characteristics of fire and the associated products of combustionunderstands how fires originate, spread within and outside of buildings/structures, and can be detected, controlled, and/or extinguished, andis able to anticipate the behavior of materials, structures, machines, apparatus, and processes as related to the protection of life and property from fire.

For more information on the role of the Fire Protection Engineer in the design of fire protection systems, see the SFPE Position Statement on The Engineer and theTechnician: Designing Fire Protection Systems at www.sfpe.org(http://www.sfpe.org).

B. Professional Role in 'Whole Building' DesignFire protection engineers exemplify the concept of "whole building design." Fire protection engineers design systems that, taken individually, could be consideredmechanical (fire sprinklers, fire-fighter's standpipes, smoke control), electrical (fire alarm), architectural (means of egress design), or structural (fire resistancedesign).

When designed by fire protection engineers, these systems are coordinated into a comprehensive, fire and life safety strategy.

It is beneficial to involve fire protection engineers in a design at the earliest stages of planning, generally at the feasibility or concept design stage. The benefits ofinvolving a fire protection engineer at this stage include:

Greater design flexibilityInnovation in design, construction, and materialsEqual or better fire safetyMaximization of cost/benefit

Conversely, if a fire protection engineer is not brought in to a project team until after problems are identified, delays can result as the fire protection engineeranalyzes the problem and develops solutions. At this stage there may be reduced design flexibility available and resistance to change by team members fromother disciplines, if portions of the project design have been completed and decisions approved. This is particularly true in cases where fire protection problemsare not identified until plans are submitted for regulatory approval.

Additionally, fire protection engineers can ensure that security related provisions(provide_security.php) designed into a building do not diminish fire safety tooccupants. For example, ensure that access control to a building does not also make it more difficult to quickly exit a building in the event of a fire or similaremergency.

C. Strategies for Achieving "Whole Building" Design ObjectivesFor most projects, fire protection engineering is largely practiced through the application of prescriptive codes and standards. For broad classifications ofoccupancies or fire hazards, prescriptive codes and standards identify, in very specific terms, exactly how individual fire protection systems are to be designed,installed, tested, and maintained.

Prescriptive codes and standards have the benefit that they are easy to apply and enforce. Additionally, buildings designed to prescriptive codes and standardshave a good history of performance in fires. However, they do not result in uniform levels of safety or cost-benefit. Consider, for example, stores classified as

(/design/) (/project/) (/om/) (/references/) (/tools/) (/education/) (/bim/)

Fire Protection Engineering

INTRODUCTION

DESCRIPTION

mercantile occupancies. A store that sells greeting cards would fall under this occupancy classification, as would a store that sold liquor in bottles. Although theprotection that would be required in these stores would be similar, the fire hazard presented by these stores would be different.

"Performance-based design" is a tool that can be used to look at fire safety from a "whole building" perspective. "Performance-based design" is an engineeringapproach to fire protection design based on (1) established fire safety goals and objectives, (2) analysis of fire scenarios, and (3) quantitative assessment ofdesign alternatives against the fire safety goals and objectives using engineering tools, methodologies, and performance criteria (SFPE, 2000).

When using performance-based designs, fire safety goals for a building are identified. These goals may include life safety, property protection, mission continuity,and environmental protection. These goals are subsequently refined into quantitative measures of building performance through engineering analysis andconsultation with building stakeholders, such as the building owner and code enforcement officials. Next, fire scenarios are established. Fire scenarios aredescriptions of the types of fires from which the building is intended to provide protection.

The next step is the selection of design strategies. The types of fire protection strategies that are used in performance-based design are no different than thosethat are used when applying prescriptive codes, such as detection, suppression, egress, or fire endurance.

After fire protection strategies are developed, they are evaluated using engineering tools and models to determine whether the fire safety goals are met for each ofthe fire scenarios.

For most buildings, the entire building will not be designed on a performance basis. Much of the building will be designed using prescriptive codes, and forrelatively simple buildings, all of the building will likely be designed using prescriptive codes. However, performance-based design offers opportunities to achievedesired aesthetics(aesthetics.php) or functionality(func_oper.php) in a building. It also ensures that the fire performance of the whole building will be consideredas more than an agglomeration of single systems.

Historically, performance-based design has been practiced by use of "equivalency" or "alternate methods and materials" clauses found in most prescriptive codes.These clauses permit the use of strategies other than those specified in the code, provided that they provide an equivalent or greater level of safety. Within the lastfew years, performance-based codes and design guides have been published. See following section, Emerging Issues.

Designing from a "whole building" approach does not require that design be on a performance-basis. It is necessary, however, that the design of fire protection-related systems be coordinated with each other and with other building systems and the overall building design.

D. Relationship to Building Systems and Relevant Codes and StandardsFire protection engineers generally design the following types of systems:

Fire sprinklersStandpipesFire detection and alarmSpecial hazards systems, such as clean agents, water mist, or COSmoke management

Additionally, fire protection engineers frequently collaborate with other design professionals in the design of the following systems:

Structural fire resistanceFire rated constructionMeans of egress

E. Interaction with Other DisciplinesDesigning a building from a 'whole building' approach requires a fire protection engineer to coordinate the different types of fire protection that are designed intobuildings including:

coordination of sprinkler system zoning with fire alarm system zoningcoordination of sprinkler system water flow and tamper switches with the fire alarm systemcoordination of fire alarm and egress system with building securitycoordination of smoke control systems with detection and HVAC system designscoordination of fire separations with architectural designscoordination of penetrations of fire rated assemblies with mechanical and electrical designs (e.g., piping, ductwork, and wiring penetrations)coordination of means of egress with architectural designs.

Performance-based design has been practiced for decades through the use of "equivalency" clauses and "alternate methods and materials" clauses found in mostprescriptive codes. In these cases, performance-based design was applied on an ad-hoc basis, with the approach used developed between the designer and codeenforcement official.

Over the last decade, performance-based design has become more formalized. In the U.S., several performance-based codes have been published, including theInternational Performance Code and performance-based options within the NFPA Building Construction and Safety Code and the NFPA Life Safety Code. Additionally,several guides have been published by the Society of Fire Protection Engineers that provide information intended to facilitate performance-based design, includingthe SFPE Engineering Guide to Performance-Based Fire Protection Analysis and Design of Buildings.

Performance-based design facilitates designing fire protection from a "whole building" perspective, as it requires that interactions between all fire protectionsystems with the building and its occupants be considered.

Additionally, in the wake of 9/11, several issues, such as structural fire protection and means of egress of high-rise buildings, are receiving increased attention.This attention may result in changes in the way buildings are designed, or an affirmation of current approaches.

EMERGING ISSUES

Fire protection is impacted by a number of codes and standards. The most frequently used codes and standards include:

National Fire Protection Association (NFPA)NFPA 13, Standard for the Installation of Sprinkler Systems(/references/ihs_l.php?d=nfpa%2013)NFPA 72, National Fire Alarm Code(/references/ihs_l.php?d=nfpa%2072)NFPA 101, Life Safety Code(/references/ihs_l.php?d=nfpa%20101)NFPA 1, Uniform Fire Code(/references/ihs_l.php?d=nfpa%201)NFPA also publishes several codes and standards which cover specific aspects of fire protection and fire related hazards.

International Code CouncilInternational Building Code(/references/ihs_l.php?d=icc%20ibc)International Fire Code(/references/ihs_l.php?d=icc%20ifc)

ASTM publishes several fire protection related standards through its E-5 committee.

WBDG

Design ObjectivesAestheticsEngage the Integrated Design Process(engage_process.php), Secure / SafePlan for Fire Protection(fire_protection.php), Secure / SafeEnsureOccupant Safety and Health(ensure_health.php)

Professional AssociationsSociety of Fire Protection Engineers(http://www.sfpe.org) (SFPE)The professional association for fire protection engineering. The association producespublications and education programs on subjects pertinent to fire protection engineering.

OrganizationsASTM International(http://www.astm.org)Through its E-5 committee, ASTM International, formally known as the American Society for Testing and Materials,publishes a number of fire test standards that address issues such as flame spread and structural fire resistance.International Code Council(http://www.iccsafe.org) (ICC)The mission of the ICC is to provide codes, standards, products, and services for all concerned withthe safety and performance of the built environment. The ICC publishes model codes that are adopted throughout the United States. These include theInternational Building Code, the International Fire Code, and the International Performance Code.National Fire Protection Association(http://www.nfpa.org) (NFPA)The mission of the NFPA is to reduce the worldwide burden of fire and other hazards onthe quality of life by providing and advocating scientifically-based consensus codes and standards, research, training, and education. Established in 1896,NFPA publishes 300 codes and standards using a code-development process that is accredited by the American National Standards Institute (ANSI).National Institute of Standards and Technology(http://www.fire.nist.gov) (NIST)The Building and Fire Research Laboratory at NIST conducts fire researchand develops fire models. The NIST web page provides links to all recent NIST fire related publications and free downloads of all fire models published byNIST. Fire test data can also be downloaded from the NIST site.Underwriters Laboratories(http://www.ul.com) (UL)is a product-safety testing and certification organization. UL tests and certifies a number of fireprotection products for compliance with fire test standards.

Publications and Reference BooksFire Protection Handbookprovides valuable information on the basis for their codes and standards, and also provides information on some basic fire science.The National Fire Protection Association's codes and standards provide criteria associated with the design of fire safety in buildings.SFPE Handbook of Fire Protection Engineering is a comprehensive compendium of the fire science that underpins fire protection engineering. The Handbookprovides information in the areas of the fundamental science and engineering concepts that are applied in fire protection engineering, fire dynamics, firehazard calculations, design calculations, and fire risk analysis.

Several other publications related to fire protection engineering are available from www.sfpe.org(http://www.sfpe.org).

Design and Analysis ToolsThere are several computer models available that can be used to simulate fires. Primarily because they can be obtained for free, the most commonly used modelsare those that are published by NIST. However, several proprietary models are also available. Additionally, several tools are available to perform other types of fireprotection calculations. The most widely used are sprinkler hydraulic calculation programs. There are also a number of programs available for performingcalculations associated with the design of other types of fire protection systems. These programs are generally proprietary.

A comprehensive listing of fire models is available at www.firemodelsurvey.com(http://www.firemodelsurvey.com).

TrainingPost graduate trainingContinuing education

In the United States, post-graduate education in fire protection engineering is available from the University of Maryland(http://www.enfp.umd.edu) and WorcesterPolytechnic Institute(http://www.wpi.edu/Academics/Depts/Fire/). While both programs are located on the east coast, both also offer distance-learning programs.

The two largest sources of continuing education are:

RELEVANT CODES AND STANDARDS

MAJOR RESOURCES

The Society of Fire Protection Engineers(http://www.sfpe.org) provides courses on a number of aspects of fire protection engineering. Courses are offered inboth classroom and distance-learning formats.The National Fire Protection Association(http://www.nfpa.org) offers a number of courses that are designed to help students better understand the codes andstandards that NFPA publishes.

Additional Resources"Coming of Age," article in Journal of Fire Protection Engineering by Lucht, D. 1 (2), pp. 35-48. 1989.Engineering GuidePerformance-Based Fire Protection Analysis and Design of Buildings by National Fire Protection Association. Quincy, MA: SFPE, 2000.2007 Profile of the Fire Protection Engineer(http://www.sfpe.org/upload/the_2007_sfpe_employment_survey_-_final.pdf) (PDF) A survey conducted by theSociety of Fire Protection Engineers.

National Institute of Building Sciences(http://www.nibs.org/) | An Authoritative Source of Innovative Solutions for the Built Environment1090 Vermont Avenue, NW, Suite 700 | Washington, DC 20005-4950 | (202) 289-7800 | Fax (202) 289-1092

2015 National Institute of Building Sciences. All rights reserved. Disclaimer(/about.php)