Haw. Code R. § tit. 3, Building Code Council, State Residential Code, AMENDMENTS to THE INTERNATIONAL RESIDENTIAL CODE FOR ONE- AND TWO-FAMILY DWELLINGS, 2018 EDITION
R1011 is amended to read as follows: "R1011 Title
These provisions shall be known as the State Residential Code and shall be cited as such and will be referred to herein as "this code"."
R101.2 Scope shall be amended to read as follows:
"The provisions of this code shall apply to the construction, alteration, movement, enlargement, replacement, repair, equipment, use and occupancy, location, removal and demolition of detached one- and two-family dwellings and townhouses not more than three stories above grade plane in height with a separate means of egress and their accessory structures not more than three stories above grade plane in height.
Exception: The following shall be permitted to be constructed in accordance with this code where provided with a residential fire sprinkler system complying with the State Plumbing Code:
Section R102.4 is amended to read as follows:
"R102.4 Referenced code and standards. The codes and standards referenced in this code shall be considered part of the requirements of this code to the prescribed extent of each such reference and as further regulated in Sections R102.4.1 and R102.4.2.
Exception: Where enforcement of this code provision would violate the conditions of the listing of the equipment of appliance, the conditions of the listing and manufacturer's instructions shall apply.
R102.4.1 Conflicts. If a referenced code conflicts with another applicable law of the jurisdiction, then said applicable law shall prevail over the referenced code.
R102.4.1.1 Plumbing Code. Wherever the term International Plumbing Code is used in this code, it shall mean the adopted State Plumbing Code.
R102.4.1.2 Fire Code. Whenever the term International Fire Code is used in this code, it shall mean the adopted State Fire Code.
R102.4.1.3 International Energy Conservation Code. Whenever the term International Energy Conservation Code is used in this code, it shall mean the adopted State Energy Conservation Code.
R102.4.1.4 International Fuel Gas Code. Whenever the term International Fuel Gas Code is used in this code, it shall mean the adopted State Plumbing Code.
R102.4.1.5 International Building Code. Whenever the term International Building Code is used in this code, it shall mean the adopted State Building Code.
R102.4.1.6 Electrical Code. The provisions of the State Electrical Code shall apply.
R102.4.1.7. Other referenced codes not listed in Section 102.4.1 are considered referenced guidelines and not mandatory."
Section R102.7 is amended to read as follows:
"Section R102.7 Existing Structures. Existing structures that were constructed in accordance with prior building code requirements may continue to be used and occupied provided that the continued use does not constitute a hazard to the general safety and welfare of the occupants and the public."
Sections R103 through R114 are deleted in their entirety.
R301.1.1 Alternative provisions is amended to read as follows:
"R301.1.1 Alternative provisions. As an alternative to the requirements in Section R301.1 the following standards are permitted subject to the limitations of this code and the limitations therein. Where engineered design is used in lieu of or in conjunction with these standards, the design shall comply with the State Building Code.
Section R301.1.3 Engineered design shall be amended to read as follows:
"Section R301.1.3 Engineered design. When a building of otherwise conventional construction contains structural elements exceeding the limits of Section R301, or otherwise not conforming to this code, these elements shall be designed in accordance with accepted engineering practice using the Alternative Provisions listed in R301.1.1. The extent of such design need only demonstrate compliance of nonconventional elements with other applicable provisions and shall be compatible with the performance of the conventional framed system. Engineered design in accordance with the State Building Code is permitted for all buildings and structures, and parts thereof, included in the scope of this code. Engineered design in accordance with the State Building Code shall be required when a building exceeds three stories or 3000 square feet of gross floor area."
Section R301.2.1 Wind design criteria shall be amended to read:
"R301.2.1 Wind design criteria. Buildings and portions thereof shall be constructed in accordance with the wind provisions of this code provided that the ultimate design wind speed VULT, determined from Figures R301.2(9)(a) through R301.2(9)(f), is less than 130 mph. The structural provisions of this code for wind loads are not permitted where wind design is required, when VULT, determined from Figures R301.2(8)(a) through R301.2(8)(f), is equal to or greater than 130 mph. Where different construction methods and structural materials are used for various portions of a building, the applicable requirements of this section for each portion shall apply. Where not otherwise specified, the wind loads listed in Table R301.2(2) adjusted for height and exposure using Table R301.2(3) shall be used to determine design load performance requirements for wall coverings, curtain walls, roof coverings, exterior windows, skylights, garage doors and exterior doors. Asphalt shingles shall be designed for wind speeds in accordance with Section R905.2.4. A continuous load path shall be provided to transmit the applicable uplift forces in Section R802.11.1 from the roof assembly to the foundation. The ultimate design wind speed, VULT, in the State Residential Code is equal to the basic design wind speed, V, in the State Building Code."
Section R301.2.1.1 Wind limitations and wind design required shall be amended to read:
"R301.2.1.1 Wind limitations and wind design required. The wind provisions of this code shall not apply to the design of buildings where wind design is required in accordance with Section R301.2.1.
Exceptions:
In regions where wind design is required in accordance with Section R301.2.1, the design of buildings for wind loads shall be in accordance with one or more of the following methods:
The elements of design not addressed by the methods in Items 1 through 4 shall be in accordance with the provisions of this code.
Where wind design is required and design is in accordance with the methods in Items 1 through 3, the building must be provided with opening protection for windborne debris. Options for opening protection or alternatives to opening protection shall be in accordance with the State Building Code."
Figures R301.2(5)(a) through R301.2(5)(f) are added to replace Figures R301.2(5)A and R301.2(5)B, as follows: "
Figure R301.2(5)(a) County of Hawaii Ultimate Wind Speed, VULT, for Components and Cladding
Figure R301.2(5)(b) County of Maui, Island of Maui Ultimate Wind
Figure R301.2(5)(c) County of Maui, Island of Molokai Ultimate Wind Speed, VULT, for Components and Cladding
Figure R301.2(5)(d) County of Maui, Island of Lanai Ultimate Wind Speed, VULT, for Components and Cladding
Figure R301.2(5)(e) City and County of Honolulu Ultimate Wind Speed, VULT, for Components and Cladding for Risk Category II Buildings less than 100 feet Tall
Figure R301.2(5)(f) County of Kauai Ultimate Wind Speed, VULT, for
Components and Cladding for Risk Category II Buildings less than 100 feet Tall"
Exposure Category Section R301.2.1.3 is amended to read as follows:
"R301.2.1.4 Exposure Category. The exposure category shall be determined from Figures R301.2.1.4(a) through R301.2.1.4(e) or using the provisions of ASCE 7-10.
Figure R301.2.1.4(a) Exposure Category Zones for Hawaii County
Figure R301.2.1.4(b) Exposure Category Zones for Island of Maui, Maui County
Figure R301.2.1.4(c) Exposure Category Zones for Islands of Molokai and Lanai, Maui County
Figure R301.2.1.4(d) Exposure Category Zones for the City and County of Honolulu
Figure R301.2.1.4(e) Exposure Category Zones for Kauai County"
Section R301.2.1.5 Topographic wind effects shall be amended to read:
"R301.2.1.5 Topographic wind effects. Topographic wind speed effects shall be considered in the design of the building. Buildings designed using the ultimate wind speed as determined from Figures R301.2(5)(a) through R301.2(5)(f) and wind exposure categories determined in accordance with section R301.2.1.4 shall be deemed to comply with this section."
Section R301.2.1.5.1 Simplified topographic wind speed-up method shall be deleted in its entirety.
Section R301.2.2.1 Determination of seismic design category shall be amended to read:
"R301.2.2.1 Determination of seismic design category. Buildings shall be assigned a seismic design category in accordance with Table R301.2(4) or Figure R301.2(2)."
Table R301.2(4) Seismic Design Category by Location-Site Class D
Location | Seismic Design Category |
Kauai | B |
Oahu, Molokai & Lanai | D0 |
Maui | D1 |
Hawaii: North and South Kohala , Hamakua, & North Hilo Districts | D2 |
All other Hawaii County Districts | E |
Section R301.2.2.1.1 shall be deleted in its entirety.
Section R301.2.2.6 is amended to read as follows:
"The seismic provisions of this code shall not be used for structures, or portions thereof, located in Seismic Design Categories C, D0, D1 and D2 and considered to be irregular in accordance with this section. A building or portion of a building shall be considered to be irregular where one or more of the conditions defined in Items 1 through 7 occur. Irregular structures, or irregular portions of structures, shall be designed in accordance with the State Building Code to the extent the irregular features affect the performance of the remaining structural system. Where the forces associated with the irregularity are resisted by a structural system designed in accordance with the State Building Code, the remainder of the building shall be permitted to be designed using the provisions of this code.
Exception: For wood light-frame construction, floors with cantilevers or setbacks not exceeding four times the nominal depth of the wood floor joists [see Figure R301.2.2.6(2)] are permitted to support braced wall panels that are out of plane with braced wall panels below provided that all of the following are satisfied:
Exception: Portions of floors that do not support shear walls, braced wall panels above, or roofs shall be permitted to extend not more than 6 feet (1829 mm) beyond a shear wall or braced wall line [see Figure R301.2.2.6(4)].
Exception: For wood light-frame wall construction, one end of a braced wall panel shall be permitted to extend more than 1 foot (305 mm) over an opening not more than 8 feet (2438 mm) in width in the wall below provided that the opening includes a header in accordance with all of the following:
Exceptions:
Exceptions: Fireplaces, chimneys and masonry veneer in accordance with this code.
Figure R301.2.2.6(1) BRACED WALL PANELS OUT OF PLANE
Figure R301.2.2.6(2) BRACED WALL PANELS SUPPORTED BY CANTILEVER OR SETBACK
Figure R301.2.2.6(3) FLOOR OR ROOF NOT SUPPORTED ON ALL EDGES
Figure R301.2.2.6(4) ROOF OR FLOOR EXTENSION BEYOND BRACED WALL LINE
Figure R301.2.2.6(5) BRACED WALL PANEL EXTENSION OVER OPENING
Figure R301.2.2.6(6) OPENING LIMITATIONS FOR FLOOR AND ROOF DIAPHRAGMS
Figure R301.2.2.6(7) PORTIONS OF FLOOR LEVEL OFFSET VERTICALLY
Figure R301.2.2.6(8) BRACED WALL LINES NOT PERPENDICULAR"
Section R313.2 is revised by adding the following to the Exception:
"In accordance with HRS 46-19.8 Fire sprinklers; residences, until June 30, 2027 no county shall require the installation or retrofitting of automatic fire sprinklers or an automatic fire sprinkler system in:
Section R318.1 is amended to read:
"R318.1 Subterranean termite control methods.
Methods of protection shall be one of items 1, 2 or 3 and one of items 4, 5 or 6.
Section R318.4 is amended to read:
R318.4 Foam plastic protection. Extruded and expanded polystyrene, polyisocyanurate and other foam plastics shall not be installed on the exterior face or under interior or exterior foundation walls or slab foundations located below grade. The clearance between foam plastics installed above grade and exposed earth shall not be less than 6 inches (152mm).
Exceptions:
Section R318.5 is added to read as follows:
R318.5 Water splash. Where wood-frame walls and partitions are covered on the interior with plaster, tile or similar materials and are subject to water splash, the framing shall be protected with approved waterproof paper."
Section R318.6 is added to read as follows:
"R318.6 Pipe and other penetrations. Insulations around plumbing pipes shall not pass through ground floor slabs. Openings around pipes or similar penetrations in a concrete or masonry slab, which is in direct contact with earth, shall be filled with non-shrink grout, or other approved physical barrier."
Section R401.5 Post or pier foundations shall be added to read:
"Raised floor systems supported by post or pier foundations shall be designed in accordance with accepted engineering practice and the State Building Code."
Section R402.2.1 Materials for Concrete shall be amended to read as follows:
"R402.2.1 Materials for concrete. Materials for concrete shall comply with the requirements of Section 608.5.1. The maximum water to cement ratio for concrete slabs-on-grade shall not exceed 0.50."
Section R403.1.6.2 is added to read as follows:
"R403.1.6.2 Concrete strap type anchors. Concrete strap-type anchors made out of cold-formed steel shall not be used along the perimeter edges of a slab on grade where the steel does not have at least 11/2 inches side cover or other adequate protection".
Section R403.1.6.3 is added to read as follows:
"R403.1.6.2 Anchor bolts at the perimeter edge of a slab-on-grade. Anchor bolts shall be hot dipped galvanized in accordance with ASTM F2329 and have a minimum concrete side cover of 1-1/2 inches unless provisions have been made to protect the anchor bolts from corrosion".
Section R406.1 is deleted in its entirety.
R406.2 Concrete and masonry foundation waterproofing is amended to read:
"R406.2 Concrete and masonry foundation waterproofing. Exterior foundation walls that retain earth and enclose interior spaces and floors below grade shall be waterproofed from the higher of (a) the top of the footing or (b) 6 inches (152mm) below the top of the basement floor, to the finished grade. Walls shall be waterproofed in accordance with one of the following:
All joints in membrane waterproofing shall be lapped and sealed with an adhesive compatible with the membrane.
Exception: Organic-solvent based products such as hydrocarbons, chlorinated hydrocarbons, ketones and esters shall not be used for ICF walls with expanded polystyrene form material. Use of plastic roofing cements, acrylic coatings, latex coatings, mortars and pargings to seal ICF walls is permitted. Coldsetting asphalt or hot asphalt shall conform to Type C of ASTM D449. Hot asphalt shall be applied at a temperature of less than 200° F (93°C)."
R406.3 Dampproofing for wood foundations is amended to read as follows:
"R406.3 Waterproofing for wood foundations. Wood foundations enclosing habitable or usable spaces located below grade shall be waterproofed in accordance with Section R406.2.
R406.3.2 Below-grade moisture barrier is amended to read:
"R406.3.2 Below-grade waterproofing. One of the waterproofing systems listed in R406.2 shall be applied over the below-grade portion of exterior foundation walls prior to backfilling. The top edge of the waterproofing shall be bonded to the sheathing to form a seal. Film areas at grade level shall be protected from mechanical damage and exposure by a pressure preservative treated lumber or plywood strip attached to the wall several inches above finish grade level and extending approximately 9 inches (229 mm) below grade, The joint between the strip and the wall shall be caulked full length prior to fastening the strip to the wall. Other coverings appropriate to the architectural treatment may also be used. The waterproofing shall extend down to the bottom of the wood footing plate but shall not overlap of extend into the gravel of crushed stone footing."
Section R406.4 Precast concrete system dampproofing is deleted in its entirety.
Section R406.5 is added to read as follows:
"R406.5 Cold formed steel protection of sill track. Cold formed steel framing sills that directly bear on concrete or masonry that is in direct contact with earth shall be shielded along the exterior flange and bottom of the sill track with a self-adhered rubberized asphalt flashing material with a minimum thickness of 25 mil (0.64 mm) or other moisture barrier conforming to ASTM D412, D570, and E96/E96M."
Section R602.10.9 Braced wall panel support shall be amended to read: "R602.10.9 Braced wall panel support. Braced wall panel support shall be provided as follows:
Chapter 11 Energy Efficiency is deleted in its entirety if the authority having jurisdiction has adopted the International Energy Conservation Code.
Section M1201.1 Scope is amended to read as follows:
"M1201.1 Scope. The provisions of Chapters 12 through 22 regulate the mechanical installations that are permanently installed and used to control environmental conditions within buildings. Mechanical systems, system components, equipment, and appliances. mechanical systems specifically addressed in this code. Where an application is made for construction as described in these chapters, the owner, or the licensed design professional in responsible charge acting as the owner's agent, shall employ one or more special inspectors to provide inspections during construction on the work in these chapters as required by the building official. These inspections are in addition to the inspections specified in Section R109."
Section M1301.1 is amended to read as follows:
"M1301.1 Scope. The provisions of this chapter shall govern the installation of mechanical systems not specifically covered in other chapters applicable to mechanical systems. Installations of mechanical appliances, equipment and systems not addressed by this code shall comply with the applicable provisions of nationally published mechanical codes or standards."
Section M1307.4.2 is amended to read as follows:
"M1307.4.2 Mechanical Ventilation. Indoor locations intended for hydrogen-generating or refueling operations shall be ventilated in accordance with nationally published mechanical codes or standards."
Chapter 24 Fuel Gas is deleted in its entirety. Refer to the adopted State Plumbing Code.
Part VII Plumbing, which corresponds to Chapter 25 through 33, is deleted in its entirety. Refer to the adopted State Plumbing Code.
Chapters 35 through 43, are deleted in their entirety. Refer to the adopted State Electrical Code.
Appendix Q is adopted in its entirety with amendments.
Section AQ102 the definitions of tiny house is amended to read as follows:
"Tiny House. A dwelling that is 500 square feet (46 m2) or less in floor area excluding lofts. The maximum total floor area of 500 square feet shall mean the sum of the horizontal areas of each floor of a building, measured from the interior faces of the exterior walls. The total floor area shall include enclosed attached accessory structures such as garages or storage areas. Unenclosed attached structures such as carports, breezeways lanais or porches shall be excluded."
Appendix N is adopted in its entirety with amendments.
Amend User Notes to replace "Chapter 31 of this code" with the 'State Plumbing Code".
Haw. Code R. tit. 3, Building Code Council, State Residential Code, AMENDMENTS to THE INTERNATIONAL RESIDENTIAL CODE FOR ONE- AND TWO-FAMILY DWELLINGS, 2018 EDITION