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2112.4 Seismic reinforcing.
In structures assigned to Seismic Design Category D, masonry heaters shall be anchored to the masonry foundation in accordance with Section 2113.3. Seismic reinforcing shall not be required within the body of a masonry heater with a height that is equal to or less than 3.5 times its body width and where the masonry chimney serving the heater is not supported by the body of the heater. Where the masonry chimney shares a common wall with the facing of the masonry heater, the chimney portion of the structure shall be reinforced in accordance with Section 2113.
2112.5 Masonry heater clearance.
Combustible materials shall not be placed within 36 inches (914 mm) or the distance of the allowed reduction method from the outside surface of a masonry heater in accordance with NFPA 211, Section 12.6, and the required space between the heater and combustible material shall be fully vented to permit the free flow of air around all heater surfaces.
Exceptions:
1. Where the masonry heater wall thickness is at least 8 inches (203 mm) of solid masonry and the wall thickness of the heat exchange channels is not less than 5 inches (127 mm) of solid masonry, combustible materials shall not be placed within 4 inches (102 mm) of the outside surface of a masonry heater. A clearance of not less than 8 inches (203 mm) shall be provided between the gas-tight capping slab of the heater and a combustible ceiling.
2. Masonry heaters listed and labeled in accordance with UL 1482 or EN 15250 and installed in accordance with the manufacturer's instructions.
(Am. L.L. 2023/077, 6/11/2023, eff. 6/11/2023)
Editor's note: For related unconsolidated provisions, see Appendix A at L.L. 2023/077.
2113.1 General.
The construction of masonry chimneys consisting of solid masonry units, hollow masonry units grouted solid, or stone shall be in accordance with this section.
Chimneys shall be designed and constructed so as to provide the necessary draft and capacity for each appliance connected to them to completely exhaust the products of combustion to the outside air. The temperature on adjacent combustible surfaces shall not be raised above 160°F (71°C). Chimney and vents shall be designed to resist the effects of condensation that would cause deterioration of the chimney or vent.
In any case, the outlet shall be arranged so that the flue gases are not directed so that they jeopardize people, overheat combustible structures, or enter building openings in the vicinity of the outlet. Gas-fired appliances shall be vented in accordance with this code, the New York City Fuel Gas Code and NFPA 54.
Chimneys shall not be supported by the equipment they serve unless such equipment has been specifically designed for such loads.
2113.1.1 Chimney adequacy for temperature and gas action.
Chimneys shall be of adequate structural strength and resistant to the temperatures to which they may be subjected and to the corrosive action of gases.
2113.1.2 Chimney linings.
The lining in chimneys shall not be considered as taking either compression or tension stresses.
2113.1.3 Chimney expansion and contraction.
Expansion and contraction in chimney walls due to temperature variations shall be accommodated solely by the use of steel reinforcing rings.
2113.1.4 Reinforcing rings.
Reinforcing rings shall be provided at all changes in wall thickness, at the top of the chimney, and above and below all flue openings.
2113.1.5 Existing chimneys and vents.
Existing chimneys and vents shall comply with the requirements of Section 28-104.13 of the Administrative Code and Sections 107.18 and 2113.1.5.1 through 2113.1.5.8 of this code.
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