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16.7.2.1
Operating kettles shall not be located inside of or on the roof of any building.
16.7.2.2 Tar Kettle Location
The kettle shall be operated in a controlled area. The area shall be identified by the use of traffic cones, barriers, and other suitable means as approved by the AHJ.
16.7.2.3 Kettle Supervision
16.7.2.3.1
An operating kettle shall be attended by a minimum of one employee who is knowledgeable of the operations and hazards.
16.7.2.3.2
The employee shall be within 25 ft (7.6 m) of the kettle and shall have the kettle within sight.
16.7.2.4 Fire Extinguishers
16.7.2.4.1
Two approved 4-A:40-B:C fire extinguishers shall be provided and maintained within 25 ft (7.6 m) of the operating kettle.
16.7.2.4.2*
A minimum of one approved 4-A:40-B:C fire extinguisher shall be provided and maintained on the roof in close proximity to the roofing operations while the roofing material is being applied.
16.7.2.4.3
Fire extinguishers shall be mounted in an accessible and visible or identified location.
16.7.2.5 Exits
16.7.2.5.1
Roofing kettles shall not block exits, means of egress, gates, roadways, or entrances.
16.7.2.5.2
Kettles shall not be closer than 10 ft (3 m) from exits or means of egress.
16.7.2.6 Fuel System
16.7.2.6.1
Fuel containers shall be constructed and approved for the use for which they were designed.
16.7.2.6.2
Liquefied petroleum gas (LP-Gas) containers, hose, regulators, and burners shall conform to the requirements in Chapter 69.
16.7.2.6.3
LP-Gas cylinders shall be secured to prevent accidental tipover.
16.7.2.7
Regulators shall be required on any cylinders.
16.7.2.8
Where, in the opinion of the AHJ, physical damage to the container is a danger, protection shall be provided to prevent such physical damage.
16.7.2.9
LP-Gas containers for roofing kettles shall not be used in any building.
16.7.2.10 Maintenance
16.7.2.10.1
Roofing kettles and all integral working parts shall be in good working condition and shall be maintained free of excessive residue.
16.7.2.10.2
All piping used for pumping heated material to the roof shall be installed in a manner to prevent loss of heated material.
16.7.2.10.3
Flexible steel piping shall not be used on the vertical extension of piping systems.
16.7.2.10.4
Flexible steel piping shall be limited to those connections that are immediately adjacent to the pump kettle or discharge outlet.
16.7.2.10.5
No single length of flexible piping shall exceed 6 ft (1.8 m) in length, and all piping shall be able to withstand a pressure of at least four times the working pressure of the pump.
16.7.2.11 Roofing Kettle Doors
16.7.2.11.1
All roofing kettles shall have doors permanently attached.
16.7.2.11.2
Roofing kettle doors shall be installed in a workmanlike manner and shall be provided with handles that allow them to be opened without the operator having to stand in front of same.
16.7.2.11.3
All kettles shall have an approved, working visible temperature gauge that indicates the temperature of the material being heated.
16.7.2.12
All kettle doors shall be tightly closed and latched when in transit.
16.7.2.13 Construction
16.7.2.13.1
The materials and methods of construction of roofing kettles shall be acceptable to the AHJ.
16.7.2.13.2 Minimum Requirements
16.7.2.13.2.1
Paragraph 16.7.2.13.2 shall apply to all roofing kettles or tar pots in excess of 1 gal (3.8 L) capacity.
16.7.2.13.2.2
No roofing kettle shall have a capacity in excess of 5 barrels (bbl).
16.7.2.13.2.3
Roofing kettles of 2 bbl capacity or less shall be constructed of steel sheet having a thickness of not less than 0.105 in. (No. 12 Manufacturers' Standard Gauge). Kettles of more than 2 bbl capacity shall be constructed of steel sheet having a thickness of not less than 0.135 in. (No. 10 Manufacturers' Standard Gauge). All supports, corners, and the top and bottom of the fire box shall be bound with angle iron or other reinforcements approved by the AHJ. All doors shall be hinged, closely fitted, and adequately latched. Fire boxes shall be of sufficient height from the ground or shall be provided with a system of shields or insulation to prevent heat damage to the street surface.
16.7.2.13.2.4
Lids that can be gravity operated shall be provided on all roofing kettles. The tops and covers of all kettles shall be constructed of steel sheet having a thickness of not less than 0.075 in. (1.90 mm) (No. 14 Manufacturers' Standard Gauge) that is close fitting and attached to the kettle with hinges that allow gravity to close the lid.
16.7.2.13.2.5
The chassis shall be substantially constructed and capable of carrying the load imposed upon it whether it is standing still or being transported.
16.7.2.13.2.6
Fuel containers, burners, and related appurtenances of roofing kettles in which LP-Gas is used for heating shall comply with all the requirements of Chapter 69.
16.7.2.13.2.7
Fuel containers that operate under air pressure shall not exceed 20 gal (76 L) in capacity and shall be subject to the approval of the AHJ.
16.7.2.13.2.8
All fuel containers shall be maintained in accordance with applicable NFPA codes and standards or shall be at least 10 ft (3 m) from the burner flame or at least 2 ft (0.6 m) therefrom when properly insulated from heat or flame.

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