County adopts the 2018 International Existing Building Code with local changes

(a) The “International Existing Building Code, 2018 Edition,” as published by the International Code Council, Incorporated, 4051 Flossmoor Road, Country Club Hills, IL 60478, is adopted by reference and made a part of this code, subject to any amendments set forth in this chapter. Hereinafter, the “International Existing Building Code, 2018 Edition,” shall be referred to as the “International Existing Building Code.” The appendices of the International Existing Building Code are not adopted unless otherwise provided in this chapter. (b) The scope, technical specifications, and exemptions set forth in the International Existing Building Code are hereby adopted as the standard for building work covered by this code, provided there are no specific provisions in any other section of this code covering the particular matter. SUPP. 11 (1-2022) 5C-4 EXISTING BUILDING CODE § 5C-2-1 (c) A copy of the International Existing Building Code shall be available for public inspection at the Hilo and Kailua-Kona offices of the department of public works and at the office of the County clerk. (d) The International Existing Building Code adopted and incorporated by reference into this code, shall be subject to the amendments hereinafter set forth. (1) Chapter 1, Part 1 - “Scope and Administration,” of the International Existing Building Code is deleted in its entirety. (2) Chapter 1, Part 2 – “Administration and Enforcement” of the International Existing Building Code is deleted in its entirety. (3) Section 202, “Definitions,” of the International Existing Building Code is amended by adding the following definition: “FAMILY shall be as defined in the Zoning Code except that a nursing, care home, or other similar facility with not more than five patients may be considered a family under this code.” (4) Section 202, “GENERAL DEFINITIONS,” of the International Existing Building Code is amended by amending the following definitions to read as follows: “BUILDING. Any structure used or intended for supporting or sheltering any use or occupancy. The term shall include but not be limited to any structure mounted on wheels such as a trailer, wagon or vehicle which is parked and stationary for any 24-hour period, and is used for business or living purposes; provided, however, that the term shall not include a push cart or push wagon which is readily movable and which does not exceed 25 square feet in area, nor shall the term include a trailer or vehicle, used exclusively for the purpose of selling any commercial product therefrom, which hold a vehicle license and actually travels on public or private streets.” “CODE OFFICIAL. The director of the County department of public works, or the director’s authorized representative.” (5) Subsection 301.5, “Compliance with accessibility,” of the International Existing Building Code is amended to read as follows: “301.5 Compliance with accessibility. Accessibility requirements for existing buildings shall comply with the following: 1. Construction of State or County buildings or facilities shall comply with Section 103-50 Hawai‘i Revised Statutes. 5C-5 SUPP. 11 (1-2022) 2. Americans with Disabilities Act Standards for Accessible Design. 3. Housing and urban development recognized “safe harbors” for compliance with the Fair Housing Acts design and construction requirements. 4. Pertinent laws relating with disabilities shall be administered and enforced by agencies responsible for their enforcement. Prior to the issuance of a building permit, the owner (or the owner’s representative, professional architect, or engineer) shall submit a statement that all requirements, relating to accessibility for persons with disabilities, shall be complied with.” (6) Section 303.3, “Seismic evaluation and design procedures,” is amended by adding a new subsection 303.3.3, “Pre-engineered bracing of post and pier foundations” to read as follows: “303.3.3 Pre-engineered bracing of post and pier foundations. For conventional light-framed single family residences two stories or less above grade, seismic bracing retrofits of elevated wood post and pier foundation systems shall be permitted to be pre-engineered designs for braces or shear walls constructed in accordance with FEMA Hazard Mitigation Grant Program DR-1664-HI drawings, “Structural Seismic Retrofits for Hawaii Single Family Residences with Post and Pier Foundations, May 2009.” (7) Section 405.2, “Repairs to damaged buildings” of the International Existing Building Code, is amended by adding subsections 405.2.1.2, “Walls Without Studs” and 405.2.1.3, “Boards for Single-Wall Construction” to read as follows: “Section 405.2.1.2 Walls without studs. 405.2.1.2.1 General. For Type V-B buildings, single-wall construction without studs may be used in accordance with this section for repairs to existing buildings of single-wall construction only. One-story and the uppermost story of wood frame Type V-B buildings may be of single-wall construction with board thickness specified in this section, without studs, when requirements of this section are met. Floor to ceiling height must not exceed 8 feet (2,438 mm). Any provision of this code to the contrary notwithstanding, studding of not less than 2-inches by 3-inches (51 mm by 76.2 mm) may be used on one-story buildings of double-wall construction. SUPP. 11 (1-2022) 5C-6 EXISTING BUILDING CODE § 5C-2-1 When wood-frame dwellings are supported by posts, 2-inch by 4-inch (51 mm by 102 mm) foundation bracing must be provided. For one-story conventional residential structures, the local practice of using foundation blocks with termite shields is acceptable in all areas except in flood hazard areas and for developments adjacent to drainage facilities as specified in chapter 27, Hawai‘i County Code. 405.2.1.3 Boards for single-wall construction. 405.2.1.3.1 One and one-eighth inch boards. Single-wall construction with boards of 1-1/8 inch (28.6 mm) net thickness are not required to have girts. 405.2.1.3.2 One-inch boards. Where single-wall construction is with boards of one-inch thickness (25.4 mm), no girt is required, provided approved stiffeners for any section of such wall are spaced not more than 10 feet (3048 mm) along the wall. 405.2.1.3.3 Three-fourths-inch boards. Single-wall construction with boards of 3/4-inch (19.1 mm) net thickness must have girts and cross partitions at least every 30 feet (9144 mm). 405.2.1.3.4 Approved stiffeners. Approved stiffeners must be studs at least 2-inches by 4-inches (51 mm by 102 mm), full height window or door jambs, posts, walls or partitions at right angles to the section of wall under construction. 405.2.1.3.5 Girts. Girts for single-wall construction must be not less than 2-inches by 6-inches (51 mm by 152 mm) belt course or other approved strengthening about mid height between the floor and ceiling on all exterior walls. 405.2.1.3.6 Complete load path. Blocking, bridging, straps, approved framing anchors or mechanical fasteners must be designed and installed to provide continuous ties from the roof to the foundation system. Sheet metal clamps, ties or clips, must be formed of ASTM A153 G90 galvanized steel or other approved corrosion-resistant material of not less than 0.040-inch (1.01 mm) nominal thickness. Uplift resistance must be in accordance with Table R802.11.” 5C-7 SUPP. 11 (1-2022) (8) Subsection 506.4.2, “Snow and wind loads,” of the International Existing Building Code is amended to read as follows: “506.4.2 Snow and wind loads. Where a change of occupancy results in a structure being assigned to a higher risk category, or where the change is from a Group S or Group U occupancy to any occupancy other than Group S or Group U, the structure shall satisfy the requirements of Sections 1608 and 1609 of the Building Code, Chapter 5A, for the new risk category. Exceptions: 1. Where the area of the new occupancy is less than 10 percent of the building area, compliance with this section is not required. The cumulative effect of occupancy changes over time shall be considered. 2. Where the change is from a Group S or Group U occupancy, use of 75% of snow and wind forces shall be permitted.” (9) Subsection 506.4.3, “Seismic loads,” of the International Existing Building Code is amended to read as follows: “506.4.3 Seismic loads (seismic force-resisting system). Where a change of occupancy results in a building being assigned to a higher risk category, or where the change is from a Group S or Group U occupancy to any occupancy other than Group S or Group U, the building shall satisfy the requirements of Section 1613 of the Building Code, Chapter 5A, for the new risk category using full seismic forces. Exceptions: 1. Where the area of the new occupancy is less than 10 percent of the building area, and the new occupancy is not assigned to Risk Category IV, compliance with this section is not required. The cumulative effect of occupancy changes over time shall be considered. 2. Where a change of use results in a building being reclassified from Risk Category I or II to Risk Category III and the seismic coefficient, SDS, is less than 0.33, compliance with this section is not required. 3. Unreinforced masonry bearing wall buildings assigned to Risk Category III and to Seismic Design Category A or B, shall be permitted to use Appendix Chapter A1 of this code. 4. Where the change is from a Group S or Group U occupancy, use of reduced seismic forces shall be permitted.” SUPP. 11 (1-2022) 5C-8 EXISTING BUILDING CODE § 5C-2-1 (10) Subsection 706.2, “Addition or replacement of roofing or replacement of equipment,” of the International Existing Building Code is amended to read as follows: “706.2 Addition or replacement of roofing or replacement of equipment. Any existing gravity load-carrying structural element for which an alteration causes an increase in design dead, live or snow load, including snow drift effects, of more than 5 percent shall be replaced or altered as needed to carry the gravity loads required by the Building Code, Chapter 5A, for new structures. Exceptions: 1. Buildings of Group R occupancy with not more than five dwelling or sleeping units used solely for residential purposes where the altered building complies with the conventional light-frame construction methods of the Building Code, Chapter 5A, or the provisions of the Residential Building Code, Chapter 5B. 2. Buildings in which the increased dead load is due entirely to the addition of a second layer of roof covering or addition of insulation, weighing 3 pounds per square foot (0.1437 kN/m2) or less over an existing single layer of roof covering.” (11) Subsection 706.3.2, “Roof diaphragms resisting wind loads in high-wind regions,” of the International Existing Building Code is amended to read as follows: “706.3.2 Roof diaphragms resisting wind loads in high-wind regions. Where roofing materials are removed from more than 50 percent of the roof diaphragm or section of a building located where the basic wind speed, V, determined in accordance with Figure 1609.3(1) of the Building Code, Chapter 5A, is greater than 115 mph (51 m/s) or in a special wind region, as defined in Section 1609 of the Building Code, Chapter 5A, roof diaphragms, connections of the roof diaphragm to the roof framing members, and roof-to-wall connections shall be evaluated for the wind loads specified in the Building Code, Chapter 5A, including wind uplift. If the diaphragms and connections in their current condition are not capable of resisting 75 percent of those wind loads, they shall be replaced or strengthened in accordance with at least 75 percent of the loads specified in the Building Code, Chapter 5A.” 5C-9 SUPP. 11 (1-2022) (12) Subsection 1006.2, “Snow and wind loads” of the International Existing Building Code is amended to read as follows: “1006.2 Snow and wind loads. Where a change of occupancy results in a structure being assigned to a higher risk category or where the change is from a Group S or Group U occupancy to any occupancy other than Group S or Group U, the structure shall satisfy the requirements of Sections 1608 and 1609 of the Building Code, Chapter 5A, for the new risk category. Exceptions: 1. Where the area of the new occupancy is less than 10 percent of the building area, the cumulative effect of occupancy changes over time shall be considered. 2. Where the change is from a Group S or Group U occupancy, use of 75% of snow and wind forces shall be permitted.” (13) Subsection 1006.3, “Seismic loads” of the International Existing Building Code is amended to read as follows: “1006.3 Seismic loads. Where a change of occupancy results in a building being assigned to a higher risk category or where the change is from a Group S or Group U occupancy to any occupancy other than Group S or Group U, the building shall satisfy the requirements of Section 1613 of the Building Code, Chapter 5A, for the new risk category using full seismic forces. Exceptions: 1. Where a change of use results in a building being reclassified from Risk Category I or II to Risk Category III and the seismic coefficient, SDS, is less than 0.33. 2. Where the area of the new occupancy is less than 10 percent of the building area and the new occupancy is not assigned to Risk Category IV. The cumulative effect of occupancy changes over time shall be considered. 3. Unreinforced masonry bearing wall buildings assigned to Risk Category III and to Seismic Design Category A or B shall be permitted to use Appendix Chapter A1 of this code. 4. Where the change is from a Group S or Group U occupancy, use of reduced seismic forces shall be permitted.” (2021, ord 21-61, sec 2.) 5C-2-1 SUPP. 11 (1-2022) 5C-10 EXISTING BUILDING CODE § 5C-4-1 Article 3. Reserved Article 4. Building Work Within Special Flood Hazard Areas.