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   (a)   Scope. This section sets forth requirements for conducting hot work operations in repair garages with a capacity for more than one (1) motor vehicle, or in connection with such businesses.
   (b)   General Provisions.
      (1)   Required hot work enclosure or partition. In repair garages with a capacity of more than one motor vehicle, hot work shall be performed in a fire-rated enclosure or behind a noncombustible partition satisfying the requirements of R2604-01(c).
      (2)   Outdoor hot work area. The Department may approve use of an outdoor area satisfying the requirements of R2604-01(d) in lieu of, or in addition to, compliance with the enclosure or partition requirements of R2604-01(c).
   (c)   Hot Work Design and Installation Requirements. In a repair garage with a capacity for more than one (1) motor vehicle, hot work shall be conducted in an area protected in one (1) of the following manners:
      (1)   Enclosure. Hot work may be conducted within a fire-rated enclosure, as set forth in FC2604.1.5.1.
      (2)   Partition. Hot work may be conducted behind a noncombustible screen that is positioned and of sufficient size to prevent the passage of sparks, slag and heat from the hot work area. Such protection may be provided by a noncombustible draw curtain affixed by rollers to an overhead monorail. Such curtain shall be in close contact with the floor at all points, and sufficiently long so as to completely enclose the motor vehicle being worked upon. The curtain shall form the third and fourth sides of the enclosure, with the exterior wall of the building forming the first and second sides.
   (d)   Outdoor Hot Work Areas. In lieu of, or in addition to, complying with the requirements of R2604-02(c), the owner of a repair garage may apply for Department approval of the use of an outdoor area for hot work operations. When such outdoor area is used in lieu of satisfying the requirements of R2604-01(c), the owner shall submit an affidavit or other approved form or documentation attesting that all hot work operations will be conducted in a designated outdoor area on the premises, or, with the written permission of the property owner, on an adjoining or nearby premises. Such outdoor area shall not be a sidewalk, public street or private road, and shall be otherwise acceptable for such purposes pursuant to FC2601.3.
   (a)   Scope. This section sets forth standards, requirements and procedures for the use of oxygen and a flammable gas in citywide hot work operations.
   (b)   Permits for Citywide Hot Work Operations.
      (1)   Inspection of vehicles. Each vehicle used to transport torches and containers of oxygen and flammable gas for use in citywide hot work operations shall be inspected by a Department representative at the Bureau of Fire Prevention's Hazardous Cargo Vehicle Inspection Facility prior to the issuance of a permit for citywide hot work operations.
      (2)   Permit limitation. Pursuant to FC105.1.2, a citywide permit authorizes hot work at any particular construction site for a maximum duration of thirty (30) days. A site-specific permit shall be obtained for any construction site at which hot work operations are conducted for more than 30 days.
      (3)   Reserve storage of oxygen and flammable gases. A citywide permit for hot work operations does not authorize reserve storage of oxygen or flammable gas at a work site. A separate application shall be made for a permit authorizing such reserve storage, as set forth in FC105.6.
      (4)   Availability of permit for inspection. A copy of the citywide permit shall be kept in each vehicle which transports oxygen and flammable gas for use during hot work operations. The permit shall be valid only for the specific motor vehicle identified on the permit. A copy of the citywide permit shall also be available at each job site location and made available for inspection by any Department representative.
   (c)   Transport Vehicle Requirements.
      (1)   Securing of containers. Containers shall be safely secured with metal brackets or chains.
      (2)   Vehicle signage. To indicate that flammable gas is being transported, each transport vehicle shall be marked, on each side and the rear of the vehicle, with durable signs complying with the requirements of United States DOTn regulations.
      (3)   Portable fire extinguisher requirements. A portable fire extinguisher with at least a 2-A:20-B:C rating shall be provided on the vehicle and kept readily accessible.
   (d)   Notification of Hot Work. The owner of the premises on which the hot work operations are to be conducted shall be notified in writing by the citywide permit holder at least forty-eight hours in advance of the intent to conduct hot work operations. Such notice shall additionally inform the owner of the owner's responsibility to designate a responsible person to ensure that the work is performed in accordance with the requirements of FC Chapter 26 and this section. The citywide permit holder is hereby deemed to be designated as the responsible person for hot work operations at Group R-3 occupancies, unless the owner affirmatively designates a responsible person other than the citywide permit holder by executing an affidavit or other document approved by the Department. The citywide permit holder shall provide to the owner a copy of the applicable provisions of FC Chapter 26 and this section with such notification.
   (a)   Scope. This section sets forth standards, requirements and procedures for the design, installation, operation and maintenance of devices and installations utilizing piped natural gas and oxygen, including torches used in the manufacture of jewelry. This section shall apply to both new and existing devices and installations.
   (b)   Definition. The following term shall, for purposes of this section and used elsewhere in the rules, have the meanings shown herein:
Natural gas/oxygen consuming device. A device, equipment or system that utilizes piped natural gas and oxygen together for heating, melting or welding.
   (c)   Permits.
      (1)   Required permits. The owner or operator of a natural gas/oxygen consuming device shall obtain required permits prior to storage, handling and use of natural gas or oxygen:
            (A)   for the use of such device, in accordance with FC105.6.
            (B)   for storage and handling of oxygen, if oxygen containers are stored, in accordance with FC105.6.
            (C)   To compress a gas, if natural gas or oxygen is compressed, in accordance with FC105.6.
      (2)   Permit applications. Original and renewal permit applications shall include design and installation documents of the natural gas/oxygen consuming device installation, including a schematic diagram of the natural gas piping demonstrating compliance with the requirements of FC2609.8 and this section, and such other information and documentation as the Commissioner may prescribe.
   (d)   Supervision. Natural gas/oxygen consuming device operations shall be supervised by a certificate of fitness holder, in accordance with FC2603.4.1.
   (e)   Design and Installation Requirements.
      (1)   Piping. Natural gas and oxygen piping shall be designed and installed in accordance with the Building Code and the applicable provisions of NFPA 51.
      (2)   Hot work devices. Torches and tips for natural gas/oxygen consuming devices shall be suitable for the gases used, and shall be of a type acceptable to the Commissioner.
      (3)   Pressure booster. When the natural gas supply pressure is less than five (5) psig, a pressure booster shall be provided to increase the pressure to at least five (5) psig, but not more than 15 psig.
      (4)   Flashback arrester and check valve. A UL listed combination flashback arrestor and backflow check valve shall be installed:
            (A)   On the oxygen supply line, between the final oxygen supply pressure regulator and each fuel consuming device.
            (B)   On the natural gas supply line, between the final natural gas supply pressure regulator and the fuel consuming devices.
   (f)   Operational Requirements.
      (1)   Natural gas supply pressure. Natural gas pressure supplied to a device shall not exceed 15 psig, and the oxygen supply pressure to a device shall not exceed the natural gas supply pressure.
      (2)   Reserved.
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