Oklahoma Administrative Code › Title 748 - Oklahoma Uniform Building Code Commission › Chapter 20 - Adopted Codes › Subchapter 14 - IMC[®] 2018 › Section 748:20-14-13 - IMC[®] 2018 Chapter 8 Chimneys and Vents

Current through Vol. 41, No. 20, July 1, 2024
Chapter 8 of the Oklahoma adopted IMC® has been adopted
				  with the following modifications:
(1)
				Section 805.3 Factory-built fireplaces. The originally published Section 805.3
				entitled "Factory-built chimney offsets" has been moved to Section 805.4 and a
				new section 805.3 entitled "Factory-built fireplaces" has been added to address
				errata published by the ICC®. The modification adds a requirement for
				chimneys used with factory-built fireplaces to comply with UL 127. This section
				has been added to read: 805.3 Factory-built fireplaces. Chimneys for use with
				factory-built fireplaces shall comply with the requirements of UL 127.
(2) Section 805.4 Factory-built
				chimney offsets. The originally published Section 805.4 entitled "Support" has
				been moved to Section 805.5 and the previously published Section 805.3 entitled
				"Factory-built chimney offsets" has been moved to Section 805.4. No other
				modifications have been made to the section. This section has been modified to
				read: 805.4 Factory-built chimney offsets. Where a factory-built chimney
				assembly incorporates offsets, no part of the chimney shall be at an angle of
				more than 30 degrees (.52 rad) form vertical at any point in the assembly and
				the chimney assembly shall not include more than four elbows.
(3) Section 805.5 Support. The originally
				published Section 805.5 entitled "Medium-heat appliances" has been moved to
				Section 805.6 and the previously published Section 805.4 entitled "Support" has
				been moved to Section 805.5. No other modifications have been made. This
				section has been modified to read: 805.5 Support. Where factory-built chimneys
				are supported by structural members, such as joists and rafters, such members
				shall be designed to support the additional load.
(4) Section 805.6 Medium-heat appliances. The
				originally published Section 805.6 entitled "Decorative shrouds" has been moved
				to Section 805.7 and the previously published Section 805.5 entitled
				"Medium-heat appliances" has been moved to Section 805.6. No other
				modifications have been made. This section has been modified to read: 805.6
				Medium-heat appliances. Factory-built chimneys for medium-heat appliances
				producing flue gases having a temperature above 1,000 degrees Fahrenheit (538
				degrees Celsius) measured at the entrance to the chimney shall comply with UL
				959.
(5) Section 805.7 Decorative
				shrouds. The originally published Section 805.7 entitled "Insulation shield"
				has been moved to Section 805.8 and the previously published section "805.6
				entitled "Decorative shrouds" has been moved to Section 805.7. No other
				modifications have been made. This section has been modified to read: 805.7
				Decorative shrouds. Decorative shrouds shall not be installed at the
				termination of factory-built chimneys except where such shrouds are listed and
				labeled for use with the specific factory- built chimney system and are
				installed in accordance with Section 304.1.
(6) Section 805.8 Insulation shield. The
				originally published Section 805.7 entitled "Insulation shield" has been moved
				to Section 805.8. No other modifications have been made. This section has been
				modified to read: 805.8 Insulation shield. Where factory-built chimneys pass
				through insulated assemblies, an insulation shield constructed of steel having
				a thickness of not less than 0.0187 inch (0.4712 millimeter) (No.26 gage) shall
				be installed to provide clearance between the chimney and the insulation
				material. The clearance shall be not less than the clearance to combustibles
				specified by the chimney manufacturer's installation instructions. Where
				chimneys pass through attic space, the shield shall terminate not less than 2
				inches (51 millimeter) above the insulation materials and shall be secured in
				place to prevent displacement. Insulation shields provided as part of a listed
				chimney system shall be installed in accordance with the manufacturer's
				instructions.