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20.10.090 CRC Section R329 added - Installation of Spark Arrestors Chapter 3 is amended by adding Section R329 Installation of Spark Arrestors to read as follows: R329 Installation of Spark Arrestors. Existing one- and two-family dwellings shall be retrofitted with a spark arrestor upon the occurrence of any of the following events: 1. Upon notice from the City; 2. Re-roofing; 3. Resale of the dwelling unit; 4. Issuance of a building permit for alterations, repairs or additions in excess of $1,000. In the event of a resale of a dwelling unit, the seller shall be responsible to comply with this ordinance. Any real property professional representing the seller shall be required to notify the seller of seller's obligation to comply with this ordinance. The spark arrestor shall conform to the requirements specified in the CRC Section R1003.9.1. 20.10.100 CRC Section R403.1.3 amended — Seismic Reinforcing. Section R403.1.3 is amended to read as follows: R403.1.3 Seismic reinforcing. Concrete footings located in Seismic Design Categories Do, Di and D2, as established in Table R301.2(1), shall have minimum reinforcement of at least two continuous longitudinal reinforcing bars not smaller than No. 4 bars. Bottom reinforcement shall be located a minimum of 3 inches (76 mm) clear from the bottom of the footing. In Seismic Design Categories Do, Di and D2 where a construction joint is created between a concrete footing and a stem wall, a minimum of one No. 4 bar shall be installed at not more than 4 feet (1219 mm) on center. The vertical bar shall extend to 3 inches (76 mm) clear of the bottom of the footing, have a standard hook and extend a minimum of 14 inches (357 mm) into the stem wall. In Seismic Design Categories Do, Di and D2 where a grouted masonry stem wall is supported on a concrete footing and stem wall, a minimum of one No. 4 bar shall be installed at not more than 4 feet (1219 mm) on center. The vertical bar shall extend to 3 inches (76 mm) clear of the bottom of the footing and have a standard hook. In Seismic Design Categories Do, Di and D2, masonry stem walls without solid grout and vertical reinforcing are not permitted. Exception: In detached one- and two-family dwellings which are three stories or less in height and constructed with stud bearing walls, isolated plain concrete footings supporting columns or pedestals are permitted. 20.10.110 CRC Section R507.1 amended — Decks Section R507.1 is amended to read as follows: