Section 9 - Reconstruction, Alterations or Additions in Excess of $20,000 in Cost(a) General. All new construction work, including necessary connections to the existing structure, which is part of a reconstruction, alteration or addition project for an existing school building shall comply with the regulations for new building construction when the project cost exceeds $20,000. EXCEPTION: Fire damage repair may be accomplished utilizing the approved plans and specifications for the original construction work. All regulations and standards in effect at the time of approval shall be complied with except that the testing and inspection requirements of current regulations shall apply to the reconstruction work. Minor modifications to the original approved plans may be made, subject to the approval of the Office of the State Architect/Structural Safety Section, provided that they do not reduce the structural capacity of the building.
Minor structural modifications to the structural system not exceeding the limits defined in subsection 9(c)2 A and B are permitted provided these modifications comply with the regulations in effect when the plans and specifications for the original construction were approved.
(b) Existing Non-Complying Nonstructural Elements. Existing non-complying nonstructural elements discovered during the design or construction of a reconstruction, alteration or addition to an existing complying school building shall be corrected to comply with the bracing and anchorage requirements of current regulations.(c) Required Structural Rehabilitation. Existing complying school buildings for which a reconstruction, alteration or addition project is proposed shall be required to be retrofitted to conform to the requirements for new buildings contained in Part 2, Title 24, CAC under the following conditions: (1) When the cost of the reconstruction, alteration or addition project exceeds $20,000 and 25 percent of the replacement value of the existing building.(2) When the cost of the reconstruction, alteration, or addition project exceeds $20,000 but does not exceed 25 percent of the replacement value of the existing building and the proposed modifications either:(A) Increase the existing lateral force story shear in any story by more than 5 percent or,(B) Reduce the lateral force resisting capacity in any story or in the total building by more than 5 percent.(d) Other Requirements. Individual lines of lateral force resisting elements which are to be altered or which are to be affected by other modifications shall be analyzed to determine the effects of increased loading and/or reduced capacity. For existing flexible diaphragms or other flexible structural lateral load resisting elements the effects of lateral drift on nonstructural elements shall be analyzed. Lateral forces for this analysis shall be those in effect when the building was constructed.
Cal. Code Regs. Tit. 21, § 9
1. New section filed 2-28-86; effective thirtieth day thereafter (Register 86, No. 9). Note: Authority cited: Sections 39152 and 81142, Education Code. Reference: Sections 39140, 39142, 39143, 81130, 81132 and 81133, Education Code.
1. New section filed 2-28-86; effective thirtieth day thereafter (Register 86, No. 9).