Hawaii Administrative Rules › Title 3 - DEPARTMENT OF ACCOUNTING AND GENERAL SERVICES › Building Code Council › State Building Code Council › Amendments to the 2018 ICC International Building Code (IBC) › 50 - Protection against decay and termites

Current through June, 2024
Section 2304.12 is deleted in its entirety and replaced to
					 read as follows:
"2304.12 Protection
				  against decay and termites.
2304.12.1
General.
Where required by this section, protection from decay and
				  termites shall be provided by the use of naturally durable or
				  preservative-treated wood.
2304.12.2
Wood used above ground.
Structural lumber installed above ground
				  shall be preservative-treated wood in accordance with Section 2303.1.8.
2304.12.2.1
Soil treatment and termite
				  barriers.
Where structural lumber of wood frame buildings or structures
				  are supported directly on the ground by a concrete slab, or concrete and/or
				  masonry foundation, Formosan subterranean termite protection shall be provided
				  by either chemically treating the soil beneath and adjacent to the building or
				  structure by a Hawaii licensed pest control operator, or stainless steel
				  termite barrier, or other termite protection measures approved by the building
				  official.
All soil treatment, stainless steel termite barrier, and
					 termite protection measures shall be installed according to manufacturer's
					 recommendations for control of Formosan subterranean termites, with chemical
					 barriers applied at the maximum label rates.
2304.12.3
Wood in ground
				  contact.
Wood supporting permanent buildings and structures, which is in
				  direct soil contact or is embedded in concrete or masonry in direct contact
				  with earth shall be treated to the appropriate commodity specification of AWPA
				  Standard U1.
Wood in direct soil contact but not supporting any
					 permanent buildings or structures shall be treated to the appropriate commodity
					 specification of AWPA Standard U1 for ground contact.
2304.12.4
Retaining walls.
Wood
				  in retaining or crib wall shall be treated to AWPA Standard U1.
2304.12.5
Wood and earth
				  separation.
Where wood is used with less than 6-inch vertical separation
				  from earth (finish grade), the wood shall be treated for ground-contact use.
Where planter boxes are installed adjacent to wood frame
					 walls, a 2-inch-wide (51 mm) air space shall be provided between the planter
					 and the wall. Flashings shall be installed when the air space is less than 6
					 inches (152 mm) in width. Where flashing is used, provisions shall be made to
					 permit circulation of air in the air space. The wood-frame wall shall be
					 provided with an exterior wall covering conforming to the provisions of section
					 2304.6.
2304.12.6
Under-floor clearance for access and inspection.
Minimum clearance
				  between the bottom of floor joists or bottom of floors without joists and the
				  ground beneath shall be 24 inches; the minimum clearance between the bottom of
				  girders and the ground beneath shall be 18 inches.
Exception:
Open slat wood decks shall have
					 ground clearance of at least 6 inches for any wood member.
Accessible under-floor areas shall be provided with a
					 minimum 18 inch-by 24 inch access opening, effectively screened or covered.
					 Pipes, ducts and other construction shall not interfere with the accessibility
					 to or within under-floor areas.
2304.12.7
Wood used in retaining walls
				  and cribs.
Wood installed in retaining or crib walls shall be
				  preservative treated in accordance with AWPA U1 (Commodity Specifications A or
				  F) for soil and fresh water use.
2304.12.8
Weather exposure.
All
				  portions of timbers (over 5-inch nominal width) and glued-laminated timbers
				  that form structural supports of a building or other structure shall be
				  protected by a roof, eave, overhangs, flashings, or similar coverings.
All wood or wood composite panels, in weather-exposed
					 applications, shall be of exterior type.
2304.12.9
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 conforming to Section
				  1404.2.
2304.12.10
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, BTB, or other approved physical
				  barrier.