1. (1) The use of an open salamander, coke burner or other device or receptacle of any kind in which charcoal, coal or any other fuel or combustible substance is burned for any purpose is prohibited in any enclosed area of any building or other structure unless sufficient ventilation is maintained in such enclosed area to assure a safe atmosphere for breathing and proper combustion.
2. (2) No tarpaulin or canvas covering shall be located nearer than 10 feet from a temporary combustion device unless such covering has been treated with flame retardant chemicals. Tarpaulins and canvas coverings which have been treated with flame-retardant chemicals may be located not less than four feet from a temporary combustion device. Tarpaulins and canvas coverings shall be securely fastened to prevent contact with any temporary combustion device.

3. (3) Temporary combustion devices shall not be placed on any combustible floor, platform or any other combustible surface unless such surface is protected or insulated for a minimum distance of six feet in a horizontal direction from the perimeter of the combustion device on all sides. The minimum overhead or side clearance from the combustion device to any combustible material shall be four feet. Exception:

   Exception:

   The horizontal insulation protection on a scaffold platform may be limited to the width of the scaffold platform provided there are no combustible objects or materials within six feet horizontally in any direction from the combustion device and that the other pertinent provisions of this section are complied with.

4. (4) Temporary combustion devices shall be provided with suitable base supports or legs to prevent tipping.
5. (5) An approved fire extinguisher of a suitable type shall be located on the same floor or level and within 50 feet of every temporary combustion device being used. When a temporary combustion device is used on any scaffold platform, an approved fire extinguisher of a suitable type shall be located on such platform.

6. (6) Solid fuel heaters and oil-fired salamanders are prohibited from use in any building or other structure under construction or from use on any scaffold.

   (b) Temporary combustion devices using liquefied gas.

7. (1) General.

   1. (i) After June 1, 1972 all combustion devices used for temporary heating which use liquefied gas as fuel shall be approved.
   2. (ii) Liquefied gas used as fuel in temporary combustion devices shall contain an agent which will give such gas a distinctive and detectable odor.
   3. (iii) Areas in which temporary combustion devices fueled by liquefied gas are used shall have legible warning signs affixed to every entrance to such areas. Such signs shall be conspicuously located so as to be readily visible to persons approaching such areas. Such signs shall bear the words, “DANGER—FLAMMABLE GAS” in letters at least four inches in height on a contrasting background.
   4. (iv) Temporary combustion devices manufactured after June 1, 1972 shall be provided with automatic cut-off devices which will shut off the fuel supply in the event of flame failure. Such cut-off devices shall be installed at the burners.
   5. (v) A designated person shall be in attendance on the job site at all times when liquefied gas combustion devices are operating.

8. (2) Liquefied gas cylinders and containers. Exception: Exception:

   1. (i) Cylinders and containers of liquefied gas used as fuel for the heating of construction shanties, sanitary facilities, field offices or other temporary buildings or structures on construction, demolition or excavation sites shall be located outside such buildings or other structures.

      Exception:

      Temporary combustion devices specifically designed to be attached to gas cylinders or containers.

   2. (ii) The use of cylinders or containers of liquefied gas having stored capacities in excess of 1,000 pounds each is prohibited in the interior of any building or other structure. Where such capacity cylinders or containers are used, they shall be stored in central areas outside of any building or other structure. Such liquefied gas supply shall be located a distance of at least 25 feet from any building or other structure or from any combustible material and shall be protected from the sun and high temperatures.
   3. (iii) Liquefied gas cylinders or containers not in use shall be stored or placed at a distance of at least 25 feet from any building or other structures or from any combustible material and shall be protected from the sun and high temperatures. Each storage location shall be provided with at least one approved portable fire extinguisher of a suitable type.
   4. (iv) Liquefied gas cylinders or containers shall be raised or lowered only in suitable cradles. The use of ordinary slings for such purpose is prohibited. No more than two cylinders or containers shall be handled in a cradle at one time.
   5. (v) Liquefied gas cylinders or containers shall not be dropped or thrown from any height.

   6. (vi) Liquefied gas cylinders or containers, whether full, partially full or empty, shall be securely fastened in place in an upright position and protected from any damage. Such cylinders shall not be supported in the areas of the valves or valve protectors.

      Exception:

      In operations where such cylinders must be placed in a horizontal position, as in the extraction of liquid.

   7. (vii) The control valve of any liquefied gas cylinder shall be located at the domed end of such cylinder. When not in use, such control valve shall be protected by its ring guard. A key, wrench or hand wheel shall be maintained on the spindle of every liquefied gas cylinder or container at all times during use. The use of a control valve at the combustion device as a sole means of turning off the fuel supply is prohibited.
   8. (viii) Each liquefied gas cylinder or container shall be provided with a pressure regulator or an automatic pressure reducing device. Such regulator or reducing device shall be located between the cylinder or container and the combustion device or distribution manifold.
   9. (ix) Valves, fittings, piping and other accessories connected to a liquefied gas cylinder or between a cylinder and a pressure reducing device shall be designed to withstand the maximum hydrostatic cylinder working pressure.

9. (3) Central station distribution. Where temporary combustion devices use liquefied gas supplied from a central station, the liquefied gas distribution shall be in accordance with the following:

   1. (i) Liquefied gas shall be distributed throughout the building or other structure from the cylinder or container area to the combustion devices in the gaseous state by means of flexible or rigid piping suitable for such use at a pressure not exceeding 20 pounds per square inch gage.
   2. (ii) Such flexible or rigid branch piping shall extend to a point not more than 10 feet nor less than six feet from any temporary combustion device.
   3. (iii) Such piping shall be provided with shut-off valves at each floor or equivalent level take-off from the riser, at each branch take-off and at each final take-off.
   4. (iv) The connections between the flexible or rigid piping and the temporary combustion devices shall be by means of armored flexible hose. Such hose shall be provided with metal screw connectors which shall be maintained in a tight condition.

10. (4) Use of individual liquefied gas cylinders or containers. Where each temporary combustion device is supplied with liquefied gas from an individual cylinder or container and a central station distribution system is not used, such use shall be in accordance with the following: Exception: Exception:

    1. (i) Each liquefied gas cylinder or container shall be securely fastened in an upright position and protected from any damage. Such cylinder shall not be supported in the area of the valve or valve protector.

    2. (ii) Each liquefied gas cylinder or container shall be located a minimum distance of six feet from any temporary combustion device.

       Exception:

       Any temporary combustion device specifically designed to be attached to a gas cylinder or container.

    3. (iii) Liquefied gas cylinders or containers shall be connected to temporary combustion devices by means of armored flexible hose not more than 10 feet nor less than six feet in length.

       Exception:

       Any temporary combustion device specifically designed to be attached to a gas cylinder or container.

    4. (iv) Such armored flexible hose connections shall be made by means of metal screw connectors which shall be maintained in a tight condition.

(a) General requirements.