General. Plans and specifications for any reconstruction or alteration project exceeding $100,000 in cost shall be submitted to DSA for approval in accordance with Section 4-315, except as provided within this section. The cost of work classified as maintenance as defined in Section 4-314 shall not be considered for purposes of this section.
The dollar amounts cited in this section shall be increased on an annual basis, according to an inflationary index governing construction costs that is selected and recognized by DSA. This annually adjusted dollar amount shall be published by DSA and made available to school boards and the public.
School construction projects shall not be subdivided for the purpose of evading the cost limitations of this section.
All new construction work, which is part of a reconstruction or alteration project shall comply with currently effective regulations for design and construction, where not otherwise regulated in this section.
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 DSA, provided that they do not reduce the structural capacity of the building.
All modifications affecting the existing structural elements carrying gravity load shall comply with Section 503.3, Part 10, Title 24, C.C.R.
Where any modifications to an existing school building results in an increase to the seismic or wind forces in, or decrease the capacity or stiffness of, any lateral force-resisting structural component by more than 5 percent cumulative since the original construction, then those affected components shall be made to comply with Section 319.1 or 317.7, Part 10, Title 24, C.C.R and Section 1609A, Part 2, Title 24, C.C.R. Only the affected components need be strengthened unless a rehabilitation is required for the entire building per Section 4-309(c). The capacity of the lateral force-resisting structural component may include past strengthening that was approved and certified by DSA as the basis for the percentage comparison.
Voluntary lateral force-resisting system modifications may be used where permitted in Section 4-309(d).
When the estimated cost of a reconstruction or alteration project exceeds $100,000 but does not exceed $225,000, and a licensed structural engineer determines that the project does not include any work of a structural nature, approval of the project plans and specifications by DSA is not required, provided the following three items are completed:
- The structural engineer shall submit a written statement to DSA, indicating that the project does not contain any work of a structural nature.
- The design professional in general responsible charge of the project shall certify, in writing, that the plans and specifications for the project meet any applicable fire and life-safety standards, and do not specify any work of construction that is regulated by the accessibility standards of Title 24. This certification shall be submitted to DSA, and shall bear the stamp and signature of the design professional.
- Within 10 days of the completion of the project, a DSA certified project inspector shall sign and submit to DSA a verified report on a form prescribed by DSA, indicating that the project was completed in conformance with the plans and specifications.
- Existing noncomplying, nonstructural elements. Existing noncomplying, nonstructural elements discovered during the design or construction of a reconstruction, alteration or addition to an existing complying school building and directly affected by the work of construction shall be corrected to comply with the bracing and anchorage requirements of currently effective regulations.
Required rehabilitation. Existing school buildings for which a reconstruction, alteration or addition project is proposed shall be evaluated and retrofitted as required to comply with currently effective regulations applicable to the rehabilitation of structural systems per Section 4-306, including wind and seismic force requirements, when any of the following conditions occur:
- When the cost of the reconstruction, alteration, or addition project exceeds 50 percent of the replacement value of the existing building. Air-conditioning equipment and insulation materials costs, including installation, need not be included in the percentage of replacement value calculation. For the purposes of this section, the cost of the reconstruction, alteration or addition project need not include the cost of voluntary lateral force-resisting system modifications in accordance with Section 4-309(d), except the cost shall be included when the structure is located in a fault hazard zone and a geologic hazard report demonstrates that the structure is located within 50 feet of the trace of an active fault as defined in Section 4-317(e).
When the cost of the reconstruction, alterations or addition project does not exceed 50 percent of the replacement value of the existing building, and the proposed modifications result in any of the following:
- An increase in the effective seismic weight, or wind force due to increase in surface area exposed to wind, in any story by more than 10 percent, cumulative since the original construction.
A reduction in the lateral-force-resisting capacity or stiffness of any story in any one direction by more than 10 percent, cumulative since the original construction. For the purposes of evaluating the strength or stiffness reduction, any new strengthening as part of the project shall not be included.
Exception to A and B: A rehabilitation of the structure will not be required if the elements of the existing lateral-force resisting system, without considering new strengthening as part of the project, comply with Section 319.1 or 317.7, Part 10, and Section 1609A, Part 2. The capacity of the lateral force resisting system may include past strengthening that was approved and certified by DSA as the basis for the percentage comparison.
- A structural irregularity that is prohibited in ASCE 7 Section 12.3.3.1 and Section 1617A.1.10, Part 2.
- When a change of occupancy results in a structure being reclassified to a higher risk category.
- Voluntary lateral force-resisting system modifications. Alterations to existing structural components or additions of new structural components that do not exceed the limitations of Section 4-309(c)2 for required rehabilitation and are initiated for the purpose of increasing the strength or stiffness of the lateral force-resisting system of an existing structure are permitted to be evaluated and designed in accordance with Section 317.11 of Part 10, Title 24, C.C.R. and Section 1609A, Part 2, Title 24, C.C.R. for voluntary lateral force-resisting system modifications.
When building damage due to an earthquake or wind is repaired, all portions of the building associated to this damage shall be retrofitted to comply with currently effective regulations.
Authority: Education Code Sections 17310 and 81142.
Reference: Education Code Sections 17280, 17295, 81130 and 81133.
HISTORY:
- New section filed 2-28-86; effective 30th day thereafter (Register 86, No. 9).
- (OSA/SS 1/92) Regular order by the Office of the State Architect/Structural Safety Section to amend Section 4-309, Part 1, Title 24, C.C.R. Filed with the Secretary of State on December 15, 1992; effective July 1, 1993. Approved by the California Building Standards Commission on December 9, 1992.