When are fire protection standpipes required to be installed in commercial buildings?

It is prudent to thoroughly research the building code, fire code and local jurisdictional requirements early in the design process to ensure the design is both code compliant and is safe for its occupants.
FDC Knox Cap

Standpipe systems are permanent piping systems, and associated equipment, that transports water from a reliable water source to designated areas of a building where hoses can be deployed for fire- fighting. (NFPA Fire Protection Handbook 20th Edition)

Standpipe systems are typically designed and installed according to NFPA 14 (National Fire Protection Association) and local jurisdiction requirements.

There are three classes of standpipes:

Class I Systems:

Piping and 2-1/2” hose connections at designated locations within a building for fire department use.

Fire Protection Standpipe

Class II Systems:

Piping and 1-1/2” hose connections for trained occupant use as well as fire department use.  Systems utilizing 1-1/2” hose valves rely on trained occupants to operate and not on fire-fighting personnel.  Due to safety and training concerns, these systems have largely been disabled or the tenant hoses have been removed.

Fire Standpipe 2

Class III Systems:

Piping, 1-1/2” hose connections as well as 2-1/2” hose connections for trained occupant use as well as fire department use.  Systems utilizing 1-1/2” hose valves rely on trained occupants to operate and not on fire-fighting personnel.  Due to safety and training concerns, these systems have largely been disabled or the tenant hoses have been removed.

Fire Standpipe 3

A “Class I” standpipe is the most common type of fire protection standpipe system today.  Class I standpipes are required due to the International Building Code, Chapter 9 requirements. The code specifically states in [F] 905.3.1 Height: “Class III standpipe systems shall be installed throughout buildings where the floor level of the highest story is located more than 30 feet (9144 mm) above the lowest level of fire department vehicle access, or where the floor level of the lowest story is located more than 30 feet (9144 mm) below the highest level of fire department vehicle access.”

Exceptions: Class I standpipes are allowed in buildings equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1or 903.3.1.2. (Generally speaking, most buildings over 10,000 square feet must be fully sprinkled.)

In summary, if a building is required to be equipped with a fully automatic sprinkler system, and it is more than 30 feet from surrounding grade to the highest or lowest story, a Class I standpipe system is likely required.  There are exceptions to this rule, so it is prudent to thoroughly research the building code, fire code and local jurisdictional requirements early in the design process, for every project, to ensure the design is both code compliant and is safe for its occupants.

Your project needs Mechanical, Electrical, and Plumbing Engineers who have done this before. Our MEP team has completed the HVAC, electrical, and plumbing design for hundreds of apartments, office buildings, and related development projects. Contact us today to learn how we can make your next project a success! 

Photo by Jclemens / CC BY-SA 4.0

Share this post

Share on facebook
Share on twitter
Share on linkedin
Share on email

Share this post

Share on facebook
Share on twitter
Share on linkedin
Share on email

Learn more
about our
services

Related

WGI logo sign installation
Blog

A New Look for the New Year

We’re refreshing our brand to reflect the energy, inspiration, and excitement that we feel when we come to work every day.

JOIN THE TEAM

You’ve been searching for a place like WGI. We look forward to meeting you soon.

We're
Nearby

Enter your zip code, and we’ll personalize your experience with local projects, office locations, team members, and more.

WGI's success starts with our Associates

WGI supports its associates with meaningful opportunities for growth, strong benefits and perks, while we work collaboratively with clients and co-consultants to shape and improve communities.

Our Team in Action

Join the Team

WGI is a dynamic organization with opportunities nationwide for engineers, land surveyors, landscape architects, environmental scientists, and architects.

Our Leadership

Find a team member:

Let's talk about your next project.