Los Angeles Municipal Code Art. 1.5 , Division 10 [chimneys and Fireplaces]

Chapter 10 of the CRC is hereby adopted by reference with the following exceptions, modifications and additions.

91.5.1001.3.1. Vertical Reinforcing. For chimneys up to 40 inches (1016 mm) wide, four No. 4 continuous vertical bars adequately anchored into the concrete foundation shall be placed between wythes of solid masonry or within the cells of hollow unit masonry and grouted in accordance with CRC Section R606. Grout shall be prevented from bonding with the flue liner so that the flue liner is free to move with thermal expansion. For chimneys more than 40 inches (1016 mm) wide, two additional No. 4 vertical bars adequately anchored into the concrete foundation shall be provided for each additional flue incorporated into the chimney or for each additional 40 inches (1016 mm) in width or fraction thereof. (Readopted by Ord. No. 188,797, Eff. 12/31/25.)