NFPA 13 is the industry standard on all matters related with sprinkler systems in the USA, and the first version was published over a century ago in 1896. It is important to note, however, that state and municipal authorities often introduce additional requirements. For example, fire sprinkler systems in NYC must also meet local amendments to NFPA 13, along with additional requirements set forth in the NYC Building Code and NYC Fire Code.

The NFPA 13 standard is nearly 500 pages long, and very detailed in requirements and specifications. This article will provide an overview of the main points covered, but is by no means a substitute for the whole document. Also keep in mind that automatic fire sprinkler installations in NYC can only be approved if a Registered Design Professional (RDP) submits construction documents, and the work permit is only issued to a qualified and licensed contractor - either a Licensed Master Plumber (LMP) or Licensed Fire Suppression Contractor (LFSC).

Get a professional fire sprinkler design and meet the NFPA 13 standard.

Local Law 26 of 2004 makes fire sprinklers mandatory for all business occupancies where the building is at least 100 feet tall. If an NYC property is covered by LL26/04, the deadline to install an automatic sprinkler system is July 1, 2019. Since these projects can be time-consuming and capital-intensive in large buildings, the best advice we can give you is to start as soon as possible and with the assistance of qualified engineering consultants.

Newer editions of the NFPA 13 are not retroactive in most cases, which means you are not required to upgrade existing installations that were compliant at the time of installation. If any specific requirement is retroactive, it is state clearly in the current version of NFPA 13.

General Definitions and Requirements

Since fire sprinkler design involves plenty of technical concepts, the NFPA 13 dedicates its Chapter 3 to defining key terms that are used throughout the document. An automatic sprinkler is defined as a “a fire suppression or control device that operates automatically when its heat-activated element is heated to its thermal rating or above, allowing water to discharge over a specified area.” There is a common misconception that automatic sprinklers are activated by smoke, but actually they respond to heat.

General requirements apply for all sprinkler systems regardless of the type of building or specific configuration, unless there is a direct exception in the code. If a building uses fire sprinklers, NFPA 13 demands full coverage for the entire property unless the standard indicates clearly that a specific building area is optional.

NFPA 13 Occupancy Classification

The NFPA 13 standard classifies occupancies by hazard level. It is important to note that this only applies for fire sprinkler systems, and is not a general classification. The general classification for occupancy groups is in the NYC Building Code.

In addition to classifying the occupancy, NFPA 13 has a classification for materials stored, called “commodities” in the standard. There are four classes, I through IV, where Class I is the least vulnerable to fire and Class IV is the most vulnerable. The classification is determined based on both the materials stored and the containers used (boxes, pallets, crates, etc.).

Fire Sprinkler System Components and Installation

The core content of NFPA 13 is a description of all components used in automatic sprinkler systems, and a description of their correct installation procedure and mechanical support requirements. The standard establishes the requirements for all system components depending on their material and type. NFPA 13 provides both general requirements and application-specific requirements.

The NFPA 13 standard provides detailed requirements for each sprinkler system type.

Note that a sprinkler system can be of more than one type. For example, a wet pipe system can be configured as an antifreeze or circulating closed-loop system.

Conclusion

The NFPA 13 standard is demanding in its requirements, but this is necessary considering the important role of automatic sprinkler systems in fire protection. Keep in mind that NYC codes establish additional requirements for fire sprinkler systems, while amending the NFPA 13 standard. The best way to ensure compliance is working with qualified fire protection engineers.

Fire protection systems are critical for building safety, and subject to stringent codes. NY Engineers offers 80% first-time approval, and you can write at info@ny-engineers.com or call (786) 788-0295212-575-5300.