2113.1.5.5 Refusal of consent.

If consent is not granted by the owner of the affected building to do the alteration work required by this section, such owner shall signify his or her refusal in writing to the owner of the new or altered building and to the commissioner; and the owner of the new or altered building having provided the notices required by Section 2113.1.5.3 shall thereupon be released from any responsibility for the proper operation of the equipment due to loss of draft and for any health hazard or nuisance that may occur as a result of the new or altered building. Such responsibilities shall then be assumed by the owner of the previously constructed building. Similarly, should such owner fail to grant consent within 45 days from the date of the second notice or fail to signify his or her refusal, he or she shall then assume all responsibilities as prescribed above.

2113.1.5.6 Procedure.

It shall be the obligation of the owner of the new or altered building to:

   1.   Prepare and submit a chimney and vent plan to the department pursuant to Section 107.18.

   2.   Provide required notification pursuant to Section 2113.1.5.3.

   3.   Provide plans pursuant to Section 2113.1.5.3.3.

   4.   Prepare and submit construction documents to the department pursuant to Section 28-104 of the Administrative Code for the alteration of existing chimneys or vents which conform to the requirements of this chapter;

   5.   Obtain permit(s) for the proposed work in accordance with Section 28-105 of the Administrative Code;

   6.   Schedule this work so as to create a minimum of disturbance to the occupants of the affected building;

   7.   Provide such essential services as are normally supplied by the equipment while it is out of service;

   8.   Where necessary, support such extended chimneys, vents and equipment from this building or to carry up such chimneys or vents within his or her building;

   9.   Provide for the maintenance, repair, and/or replacement of such extensions and added equipment;

   10.   Make such alterations of the same material as the original chimney or vent so as to maintain the same quality and appearance, except where the owner of the chimney or vent shall give his or her consent to do otherwise. All work shall be done in such fashion as to maintain the architectural aesthetics of the existing building. Where there is practical difficulty in complying strictly with the provisions of this item, the commissioner may permit an equally safe alternative;

   11.   Comply with the tenant protection plan requirements of Section 28-120 of the Administrative Code; and

   12.   Comply with inspection and sign-off requirements of Section 28-116 of the Administrative Code.

2113.1.5.7 Existing violations.

Any existing violations on the previously constructed equipment shall be corrected by the owner of the equipment before any equipment is added or alterations made at the expense of the owner of the new or altered building.

2113.1.5.8 Variance.

The commissioner may grant a variance in accordance with the provisions of this code.

2113.2 Footings and foundations.

Footings for masonry chimneys shall be constructed of concrete or solid masonry not less than 12 inches (305 mm) thick and shall extend at least 6 inches (152 mm) beyond the face of the foundation or support wall on all sides. Footings shall be founded on natural undisturbed earth or engineered fill below frost depth. In areas not subjected to freezing, footings shall be not less than 12 inches (305 mm) below finished grade.

2113.3 Seismic reinforcing.

In structures assigned to Seismic Design Category A or B, or those exempt from seismic analysis, seismic reinforcement is not required. In structures assigned to Seismic Design Category C or D, masonry chimneys shall be analyzed and designed for seismic loading in accordance with TMS 402, and at a minimum shall be reinforced and anchored in accordance with Sections 2113.3.1, 2113.3.2, and 2113.4, Table 2111.1 and Figure 2111.1.

2113.3.1 Vertical reinforcement.

For chimneys up to 40 inches (1016 mm) wide, four No. 4 continuous vertical bars anchored in the foundation shall be placed in the concrete between wythes of solid masonry or within the cells of hollow unit masonry and grouted in accordance with Section 2103.3. Grout shall be prevented from bonding with the flue liner so that the flue liner is free to move with thermal expansion. For chimneys greater than 40 inches (1016 mm) wide, two additional No. 4 vertical bars shall be provided for each additional 40 inches (1016 mm) in width or fraction thereof.

2113.3.2 Horizontal reinforcement.

Vertical reinforcement shall be placed enclosed within 1/4-inch (6.4 mm) ties, or other reinforcing of equivalent net cross-sectional area, spaced not to exceed 18 inches (457 mm) on center in concrete, or placed in the bed joints of unit masonry, at not less than every 18 inches (457 mm) of vertical height. Two such ties shall be provided at each bend in the vertical bars.

2113.4 Seismic anchorage.

Masonry chimneys and foundations shall be anchored at each floor, ceiling or roof line more than 6 feet (1829 mm) above grade with two 3/16-inch by 1-inch (4.8 mm by 25 mm) straps embedded not less than 12 inches (305 mm) into the chimney. Straps shall be hooked around the outer bars and extend 6 inches (152 mm) beyond the bend. Each strap shall be fastened to not less than four floor joists with two 1/2-inch (12.7 mm) bolts.

   Exception: Seismic anchorage is not required for the following:

      1.   In structures assigned to Seismic Design Category A or B.

      2.   Where the masonry fireplace is constructed completely within the exterior walls.

2113.5 Corbeling.

Masonry chimneys shall not be corbeled more than half of the chimney's wall thickness from a wall or foundation, nor shall a chimney be corbeled from a wall or foundation that is less than 12 inches (305 mm) in thickness unless it projects equally on each side of the wall, except that on the second story of a two-story dwelling, corbeling of chimneys on the exterior of the enclosing walls is permitted to equal the wall thickness. The projection of a single course shall not exceed one-half the unit height or one-third of the unit bed depth, whichever is less. No masonry shall be corbeled from hollow or cavity wall masonry units.

2113.6 Changes in dimension.

The chimney wall or chimney flue lining shall not change in size or shape within 6 inches (152 mm) above or below where the chimney passes through floor components, ceiling components or roof components.