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Fire Sprinkler and Standpipe Systems

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Hurst Fire Department
"Making the Difference"

Fire Sprinkler and Standpipe Systems

 

SCOPE: The information provided herein serves as a planning tool for compliance.  It does not remove the responsibility of the owner to comply with all laws applicable to Fire Sprinkler and Standpipe Systems. The contents of this document are intended to assist you in the preparation of sprinkler plan submittals and installation requirements. This document is not intended to be an all-inclusive listing of the sprinkler requirements in the City of Hurst. Please reference the 2015 International Fire Code, current adopted amendments, National Fire Protection Association Standards, and the State Fire Marshal’s Office and Department of Insurance rules and regulations pertaining to Sprinkler and Standpipe Systems.

INSTALLATION REQUIREMENTS 

General Note: Permits are required for all sprinkler work. All work (underground and overhead) must be conducted by a Texas State licensed fire sprinkler contractor. All construction shall conform to recognized practices and standards. This document is not intended to act as a replacement for, nor to fully contain the requirements of the NFPA Standards, the Fire Code, local amendments or State law.

Underground Installation:

  • The water supply line connecting to the City main shall comply with NFPA 13 and 24.
  • The size of the water supply line for a hydraulically calculated fire sprinkler system shall be governed by those requirements outlined in the adopted standard of NFPA 13 and NFPA 24.
  • All water supply lines shall be hydrostatically tested at 200psi for 2 hours.
  • Line flushing shall be with the full diameter of the pipe unobstructed.

Water Supply Test Date and Information. The water supply test used for hydraulic calculation of fire protection systems shall be conducted in accordance with NFPA 291 “Recommended Practice for Fire Flow Testing and Marking of Hydrants” and within one year of sprinkler plan submittal.

903.2.11.9 Buildings Over 6,000 sq. ft. An automatic sprinkler system shall be installed throughout all buildings with a building area 6,000 sq. ft. or greater and in all existing buildings that are enlarged to be 6,000 sq. ft. or greater. For the purpose of this provision, fire walls shall not define separate buildings.

*Note: An increase in square footage of a building or space, or a change of use, will potentially require sprinkler installation.

See sprinkler threshold summary table; in addition to the 2015 International Fire Code amendment, provides some detailed information regarding the occupancy requirements for sprinkler systems.

903.3.5 Water supply as required for such systems shall be provided in conformance with the supply requirements of the respective standards; however, every water-based fire protection system shall be designed with a 10 psi safety factor. Reference Section 507.4 for additional design requirements.

901.4.6.1 Riser Access: All risers supplying multiple occupancies shall be located in a separate individual room to include an exterior door with direct access.

Exception: Buildings containing a single occupancy shall have an exterior door located within 10 feet (10’) of the riser or an approved distance as determined by the code official.

ALL riser access doors shall be labeled with 6” (six inch) letters “Riser Room.”

A key box shall be provided at this door, as required by Section 506.1.

903.3.1.2.3 Attics and Attached Garages. Sprinkler protection is required in attic spaces of such buildings two or more stories in height, in accordance with NFPA 13 and or NFPA 13R requirements, and attached garages.

903.3.1.3 NFPA 13D Sprinkler Systems. Automatic sprinkler systems installed in one- and two-family dwellings; Group R-3; Group R-4 Condition 1 and townhouses shall be permitted to be installed throughout in accordance with NFPA 13D or in accordance with state law.

903.3.1.4.3 Protection Against Freezing. New and existing fire sprinkler systems, including risers, shall be an approved design to protect against freezing or be in a conditioned space in order to maintain a temperature above 40 degrees Fahrenheit (four degrees Celsius). Areas or rooms containing risers shall be monitored for temperature conditions by the fire alarm panel and send a supervisory signal upon alarm. Heaters shall be hard wired with a maintenance disconnect in a location to be determined by the code official.

905.3.9 Buildings Exceeding 10,000 sq. ft. In buildings exceeding 10,000 square feet in area per story and where any portion of the building’s interior area is more than 200 feet (60960 mm) of travel, vertically and horizontally, from the nearest point of fire department vehicle access, Class I automatic wet or manual wet standpipes shall be provided.

903.2.11.3 Buildings 35 feet or more in height. An automatic sprinkler system shall be installed throughout buildings that have one or more stories, other than penthouses in compliance with Section 1510 of the International Building Code, located 35 feet (10 668 mm) or more above the lowest level of fire department vehicle access, measured to the finished floor.

905.2 Installation Standard. Standpipe systems shall be installed in accordance with the IFC Section 905.2 and NFPA 14. Manual dry standpipe systems shall be supervised with a minimum of 10 psig and a maximum of 40 psig air pressure with a high and low alarm.  

Where Required. Automatic Sprinklers shall not be installed in elevator machine rooms, elevator machine spaces, and elevator hoistways, other than pits where such sprinklers would not necessitate shunt trip requirements under any circumstances. Storage shall not be allowed within the elevator machine room. Signage shall be 96 provided at the entry doors to the elevator machine room indicating “ELEVATOR MACHINERY – NO STORAGE ALLOWED.”

8.15.5.7.1 Sprinklers shall be installed at the top and bottom of elevator hoistways where elevators utilize combustible suspension means such as noncircular elastomeric-coated or polyurethane coated steel belts.

8.15.5.7.2 The sprinklers in the elevator hoistway shall not be required when the suspension means provide not less than an FT-1 rating when tested to the vertical burn test requirements of UL 62, Flexible Cords and Cables, and UL 1581, Reference Standard for Electrical Wires, Cables, and Flexible Cords.

Electrical Equipment. 8.15.11.1 Unless the requirements of 8.15.11.3 are met, sprinkler protection shall be required in electrical equipment rooms.

8.15.11.2 Hoods or shields installed to protect important electrical equipment from sprinkler discharge shall be noncombustible.

8.15.11.3 Sprinklers shall not be required in electrical equipment rooms where all of the following conditions are met:

(1) The room is dedicated to electrical equipment only.
(2) Only dry-type electrical equipment is used.
(3) Equipment is installed in a 2-hour fire-rated enclosure including protection for penetrations.
(4) No combustible storage is permitted to be stored in the room.

8.15.1.2* Concealed Spaces Not Requiring Sprinkler Protection.

8.15.1.2.1* Concealed spaces of noncombustible and limited combustible construction with minimal combustible loading having no access shall not require sprinkler protection.

A.8.15.1.2.1 Minor quantities of combustible materials such as but not limited to cabling, nonmetallic plumbing piping, nonstructural wood, and so forth can be present in concealed spaces constructed of limited or noncombustible materials but should not typically be viewed as requiring sprinklers (see 8.15.1.1).

8.15.1.2.1.1 The space shall be considered a concealed space even with small openings such as those used as return air for a plenum.

8.15.1.2.2 Concealed spaces of noncombustible and limited combustible construction with limited access and not permitting occupancy or storage of combustibles shall not require sprinkler protection.

8.15.1.2.3 Concealed spaces formed by studs or joists with less than 6 in. (152 mm) between the inside or near edges of the studs or joists shall not require sprinkler protection. (See Figure 8.6.4.1.5.1.)

8.15.1.2.4 Concealed spaces formed by bar joists with less than 6 in. (152 mm) between the roof or floor deck and ceiling shall not require sprinkler protection.

8.15.1.2.5* Concealed spaces formed by ceilings attached directly to or within 6 in. (152 mm) of wood joist or similar solid member construction shall not require sprinkler protection.

8.15.1.2.9 Concealed spaces over isolated small rooms not exceeding 55 ft2 (5.1 m2) in area shall not require sprinkler protection.

8.15.1.2.11* Concealed spaces in which the exposed materials are constructed entirely of fire retardant–treated wood as defined by NFPA 703 shall not require sprinkler protection.

A.8.15.1.2.11 The allowance to omit sprinklers for fire retardant–treated wood requires a pressure-treated application. It does not apply to coated applications.

8.15.1.2.14 Vertical pipe chases under 10 ft2 (0.93m2), where provided in multifloor buildings where the chases are firestopped at each floor using materials equivalent to the floor construction, and where such pipe chases shall contain no sources of ignition, piping shall be water-filled or noncombustible and pipe penetrations at each floor shall be properly sealed and shall not require sprinkler protection.

NFPA 13R

6.6 Location of Sprinklers.

6.6.1 Sprinklers shall be installed in all areas except where omission is permitted by 6.6.2 through 6.6.7.

6.6.2* Sprinklers shall not be required in bathrooms where the bathroom area does not exceed 55 ft2 (5.1 m2).

6.6.3 Except where specified in 6.6.4, sprinklers shall not be required in clothes closets, linen closets, and pantries within dwelling units that meet all of the following conditions:

(1) The area of the space does not exceed 24 ft2 (2.2 m2).

(2) The least dimension does not exceed 3 ft (0.91 m).

(3) The walls and ceilings are surfaced with noncombustible or limited-combustible materials as defined by NFPA 220.

6.6.4* Sprinklers shall be installed in any closet used for heating or air-conditioning equipment, washers, dryers, or water heaters except as permitted by 6.6.7.

A.6.6.4 Closets with washers and dryers, and other heatproducing mechanical equipment, are not considered clothes closets, linen closets, or pantries and therefore would require sprinklers.

6.6.5* Except as provided for in 6.6.5.1, sprinklers shall not be required in any porches, balconies, corridors, carports, porte cocheres, and stairs that are open and attached.

6.6.5.1 Where a roof or deck is provided above, sprinklers shall be installed to protect attached exterior balconies, attached exterior decks, and ground floor patios serving dwelling units in buildings of Construction Type V.

6.6.5.1.1 Where sidewall sprinklers are installed beneath decks or balconies constructed with open wood joists, sprinklers shall be permitted to be installed with deflectors not less than 1 in. (25 mm) or more than 6 in. (152 mm) below the structural members, provided that the deflector is not more than 14 in. (356 mm) below the underside surface of the deck.

6.6.6* Sprinklers shall not be required in attics, penthouse equipment rooms, elevator machine rooms, concealed spaces dedicated exclusively to and containing only dwelling unit ventilation equipment, crawl spaces, floor/ceiling spaces, noncombustible elevator shafts where the elevator cars comply with ANSI A17.1, Safety Code for Elevators and Escalators, and other concealed spaces that are not used or intended for living purposes or storage and do not contain fuel-fired equipment.

A.6.6.6 Concealed spaces are permitted to have small openings such as grilles for return air when the space is being used as a plenum. Such small openings do not disqualify the space from being considered as a concealed space, and sprinklers are still permitted to be omitted.

High-piled Combustible Storage. For any building with a clear height exceeding 12 feet (4572 mm), see Chapter 32 to determine if those provisions apply.

Spray Booths and Rooms. New and existing spray booths and spraying rooms shall be protected by an approved automatic fire-extinguishing system.

Any additions or adjustments to the location of more than twenty (20) fire sprinkler heads must be prepared to have the entire fire system hydrostatically tested to NFPA standards. Any exceptions to this requirement must be authorized by the Hurst Fire Prevention Office.

Fire Department Connection

  • All FD connections for fire sprinkler or standpipe systems shall be a locking KNOX "STORZ", five (5) inch quick connect.
  • The connection shall be minimum of forty-two (42) inches above finished grade except for wall mounted FDC’s when an alternative height is approved by the Fire Code Official.
  • All FDC’s must be above an all-weather surface.
  • Vehicle impact protection consisting of four (4) inch iron, concrete filled bollard’s must be installed when and where deemed necessary by the fire code official to protect the FDC.
  • Buildings that are protected with a fire sprinkler or standpipe system are required to have a fire hydrant located within one hundred (100) feet of the fire department connection. The distance is measured by an approved route for the purpose of large diameter hose deployment.
  • Installations must be of a design approved by the fire code official.