A. All damaged reinforced chimneys must be repaired or reconstructed to comply with the requirements of Chapter 31 of the CBC (pertaining to chimneys, fireplaces and barbecues). Damaged portions shall be removed in accordance with the following criteria:
1. a. When the damaged portion is located between the roofline and the top of the chimney, the damaged portion shall be removed to the roofline, provided the roof and ceiling anchorage are in sound condition.
b. The reconstructed portion of the chimney shall be braced to the roof structure.
2. For a single-story structure in which the damaged portion of the chimney is below the roofline or extends from above the roofline to below the roofline, the chimney shall be removed to the top of the fireplace.
3. For a multiple-story structure, the damaged portion of the chimney shall be removed from the top to a floorline where sound anchorage is found.
4. In any structure where the firebox has been damaged, the entire chimney and firebox shall be removed to the foundation.
a. If the foundation is in sound condition, the firebox and chimney may be reconstructed using the existing foundation.
b. If the foundation has been damaged, the foundation shall be removed and replaced.
B. 1. Where existing conditions preclude the installation of all anchorage required by Chapter 31 of the CBC, alternate systems may be used in accordance with the alternate methods and materials provisions of the CBC, as approved by the Building Official.
2. Such alternate systems shall be designed and detailed by a structural engineer, civil engineer or architect, as approved by the Building Official.
C. When the portion of the chimney extending above the roofline exceeds two (2) times the least dimension of the chimney, that portion above the roofline shall be braced to the roof structure.
D. All damaged unreinforced chimneys shall be demolished to the footing or other founding support system.
(Ord. No. 2003-015 §1 (part)) Penalty, see § 15.02.005