Clearlake Municipal Code § 9-2 Potentially Hazardous Unreinforced Masonry Buildings

9-2.1 Adoption of Appendix Chapter 1 of the Uniform Code for Building Conservation. a. That certain Appendix Chapter 1 of the Uniform Code for Building Conversation, herein referred to as the Conservation Code, is hereby adopted and enacted as the standard for strengthening unreinforced masonry buildings constructed prior to the adoption of Lake County Ordinance No. 422 on October 2, 1961, and is made a part of this Chapter by reference with the same force and effect as if fully set forth herein. b. The Appendix Chapter 1 of the Conservation Code is hereby modified as follows: 1. Section A102 is hereby deleted.

Section A103 is hereby deleted. 3. Section A105 is hereby deleted. 4. Subsection (a) of Section A106 is hereby amended to read as follows: Analysis and Design Every structure required to be analyzed either by ordinance or voluntarily shall be analyzed and constructed to resist minimum total lateral seismic forces assumed to act nonconcurrently in the direction of each of the main axes of the structure in accordance with the following equation: V=ZIKCSW …………………………………………………… (A1-1) The value of KCS need not exceed the values set forth in Table No. A1-A based on the seismic zone as determined by the Building Code. The value of Z shall be the value specified in Table A1-B. The I Factor shall be as specified in Table A1-C. The value of W shall be as set forth in the Building Code. c. All references to the Building Code shall mean the latest edition of the Uniform Building Code as adopted by the City of Clearlake. d. The City of Clearlake shall be considered in its entirety to be located in Seismic Zone 4. (Ord. #24-90, S1)

a. POTENTIALLY HAZARDOUS BUILDINGS as used in this section shall mean only buildings constructed prior to the adoption of local building codes requiring earthquake resistant design of buildings and constructed of unreinforced masonry wall construction. b. All identified Potentially Hazardous Buildings shall be assigned by the Building Official to one of the following classifications: 1. ESSENTIAL BUILDINGS: Any building housing a hospital or other medical facility having surgery or emergency treatment areas; fire or police stations; municipal government disaster operation and communication centers. 2. HIGH RISK BUILDINGS: Any building, not classified an essential building, having an occupant load of one hundred (100) or more, as determined by Section 3302 (a) of the Building Code. EXCEPTION: A high risk building shall not include the following:

(a) Any building having exterior walls braced with masonry crosswalls or wood frame crosswalls spaced less than forty (40') feet apart in each story. Crosswall shall be full story height with minimum length of one and one-half (1 1/2) times the story height. (b) Any building used for its intended purposes, as determined by the Building Official, for less than twenty (20) hours per week. 3. MEDIUM RISK BUILDING: Any building, not classified as a high risk building or an essential building, having an occupant load of twenty (20) occupants or more as determined by Section 3302 (a) of the Building Code. 4. LOW RISK BUILDINGS: Any building, not classified as an essential building, having an occupant load of less than twenty (20) occupants as determined by Section 3302 (a) of the Building Code. 5. EXEMPT BUILDINGS: (a) Warehouses; (b) Dwellings of five (5) units or less; (c) State and Federal Buildings; (d) Historical - Qualified historical buildings shall comply with State Historical Building Code established under Part 8, Title 24 of the California Administrative Code; (e) All buildings constructed with permits issued after the adoption of Lake County Ordinance No. 422 on October 2, 1961. (Ord. #24-90, S1)

a. All legal owners of buildings identified as Potentially Hazardous Buildings shall be notified, by certified mail, that the building is considered to be one of a general type of structure that historically has exhibited little resistance to earthquake motion. b. Within thirty (30) days of receipt of notification, pursuant to subsection 9-2.3a, all legal owners may provide evidence to the Building Official that would exempt or eliminate the building from being classified as a Potential Hazardous Building. c. Within thirty (30) days of receipt of notification, pursuant to subsection 9-2.3a, shall: 1. Deliver to any tenants or occupants of identified buildings a copy of the notification and file with the Building Official the name, address and phone number of said tenants or occupants.

Post, at the identified building, a copy of the notification sent pursuant to subsection 9-2.3a within thirty (30) days of receipt thereof. The posted notice shall be highly visible to all tenants, occupants and users of the building. The notice required herein shall remain posted until the identified building has complied with all mitigation required by this Chapter. d. At the expiration of the thirty (30) day period following the receipt of notification pursuant to subsection 9-2.3a, the Building Official shall record a copy of the notification at the County of Lake Recorder’s Office, unless the identified building has been classified as exempt. e. Within twelve (12) months of the receipt of the notification, pursuant to subsection 9-2.3a, all legal owners whose buildings have not been exempted pursuant to subsection 9-2.3b, shall: 1. Remove or secure all parapets, cornices or masonry veneer extending higher than three (3') feet above grade that are adjacent to a public way as defined in the Building Code. 2. File with the Building Official a Seismic Evaluation Report. Such Seismic Evaluation Report shall be completed by a California licensed structural engineer. f. All legal owners of a building identified as a Potentially Hazardous Building shall commence and complete all recommendations in the Seismic Evaluation Report at the following times: 1. At the time of major remodeling. Major remodeling shall be considered construction of value greater than thirty-three and one-third (33 1/3%) percent of the valuation of the building as determined by the Building Official based on the current Building Valuation Data and Regional Modifiers as published periodically by the International Conference of Building Officials (ICBO). 2. At the time of a change in use of the building as defined in Section 502 of the Building Code unless the change results in a lower occupancy. 3. Prior to reoccupancy of any building that has been abandoned for a period of one year or more after the effective date of this section. 4. In the event an owner elects to repair a building that is damaged and that damage is less than fifty (50%) percent but greater than ten (10%) percent of the valuation of the building as determined by the Building Official based on the current Building Valuation Data and Regional Modifiers as published periodically by the International Conference of Building Officials (ICBO). 5. Notwithstanding any of the above, all legal owners of a building identified as a Potentially Hazardous Building shall complete all recommendations in the Seismic Evaluation Report according to the schedule set forth below: Classification Time Schedule (a) Essential Buildings One Year (b) High Risk Buildings Two Years

Classification Time Schedule (c) Medium Risk Buildings Three Years (d) Low Risk Buildings Four Years All time schedules shall commence on the date that the Seismic Evaluation Report is filed with the Building Official. g. Any identified Potentially Hazardous Building may be reclassified and will thereafter be subject to the requirements of the reclassification. h. In the event that a building identified as a Potentially Hazardous Building is damaged and that damage exceeds fifty (50%) percent of the valuation of the building as determined by the Building Official based on the current Building Valuation Data and Regional Modifiers as published periodically by the International Conference of Building Officials (ICBO) the legal owner shall remove, or cause to be removed, the entire building. i. Any building or structure or part thereof maintained contrary to the provisions of this Chapter is hereby declared to be a public nuisance. j. Any person may appeal a decision of the Building Official pursuant to this Chapter in the manner prescribed in the Uniform Administrative Code. (Ord. #24-90, S1) 9-3 BUILDING PERMITS WITHIN THE AREA SERVED BY THE SOUTHEAST WASTE WATER SYSTEM.