Legal Documents of Jefferson City
Code of Jefferson City
Title 12 Building, Utility, etc. Codes
Chapter 7 Residential Code
12-702 : Amendments to the 2018 International Residential Code.
Section R101.1 Title.
Delete "[NAME OF JURISDICTION]" and insert "Jefferson City, Tennessee" in its place.
Section R102.5 Appendices.
At the end of this section, insert the following:
"The following Appendices are specifically included in the adoption. All others are excluded.
| Appendix A | Sizing and Capacities of Gas Piping. |
| Appendix B | Sizing of Venting Systems Serving Appliances Equipped with Draft Hoods, Category I Appliances, and Appliances Listed for Use with Type B Vents. |
| Appendix C | Exit Terminals of Mechanical Draft and Direct-Vent Venting Systems. |
| Appendix F | Radon Control Methods. |
| Appendix H | Patio Covers. |
| Appendix J | Existing Buildings and Structures. |
| Appendix L | Permit Fees. |
| Appendix N | Venting Methods. |
| Appendix O | Automatic Vehicular Gates. |
| Appendix P | Sizing of Water Piping System. |
| Appendix Q | Tiny Houses. |
Table R301.2 (1) Climatic and Geographic Design Criteria.
Insert "10 PSF" in the table for Ground Snow Load.
Insert "90" in the table for Wind Speed.
Insert "No" in the table for topographic effects.
Insert "C" in the table for Seismic Design Category.
Insert "Severe" in the table for Weathering.
Insert "12 inches" in the table for Frost Line Depth.
Insert "Moderate to heavy" in the table for Termite.
Insert "19 degrees Fahrenheit" in the table for Winter Design Temp.
Insert "No" in the table for Ice Barrier Underlayment Required.
Insert "210" in the table for Air Freezing Index.
Insert "59.4" in the table for Mean Annual Temp.
Section R301.2.2 Seismic provisions.
Delete item 1, renumber item 2 to item 1 and insert "and townhouses" just after the word dwellings and at the end of the section insert "All references to "townhouses in seismic design category C" in Chapters 6, 7 and 28 shall not apply in Jefferson City."
Section R302.5.1 Opening protection.
Delete the words ", equipped with a self-closing device" and insert a period after the word "doors".
Section R303.4 Mechanical ventilation.
Add the word "(Optional)." in the section title after the word ventilation. Delete the words "the dwelling unit shall be provided with whole-house mechanical ventilation" and replace with the words "dwelling units provided with whole-house mechanical ventilation shall be."
Section 311.7.8 Handrails
Change "four or more risers" to "a total rise of 30 inches or more".
Section R313 Automatic Fire Sprinkler Systems
Add the words "(Optional, see Tennessee Code Annotated, Section 68-120-101(a)
(8)." in the section title after the word "Systems".
Section R313.1 Townhouse automatic fire sprinkler systems.
Delete the words "An automatic residential fire sprinkler system shall be installed system is installed in townhouses; the following shall apply:"
Section R313.2 One- and two-family dwellings automatic fire sprinkler systems. Delete the words "An automatic residential fire sprinkler system shall be installed in one- and two-family dwellings." and replace with "When an automatic residential fire sprinkler system is installed in one- and two-family dwellings, the following shall apply:"
Section R314.3 Location.
Insert "4. In each garage or storage area with a six foot or wider door to the outside. These smoke alarms shall be specifically approved for use in garages in the manufacturers written instructions. Exception: Heat detectors interconnected with the alarm system and having battery backup may be used in a garage or storage area."
Section R322.1.7 Protection of water supply and sanitary sewage.
Delete "and Chapter 3 of the International Private Sewage Disposal Code" and insert ", the requirements of the water and sewer service utility providers and Jefferson City" in its place.
Figure R403.1(1) Concrete and Masonry Foundation Details.
Insert a note in the figure as follows: "The bottom of all foundations shall extend a minimum of 12 inches below finished grade."
Section R502.11.4 Truss Design Drawings.
Delete "to the building official and approved prior to installation" and replace it with "for review when required by the building official".
Section R802.10.1 Truss design drawings.
Delete "to the building official and approved prior to installation" and replace it with "for review when required by the building official".
Table N1102.1.1 (R402.1.2) Insulation and Fenestration Requirements by Component. In the row for climate zone "4 except Marine", change Ceiling R-Value from "R49" to "R-38", and change the Wood Frame Wall R-Value from "20 or 13 + 5" to "13", and change the Mass Wall R-Value from "8/13" to "5/10".
Table N1102.1.4 (R402.1.4) Equivalent U-Factors.
In the row for climate zone "4 except Marine", change Ceiling U-Factor from "0.026" to "0.30", and change the Frame Wall U-Factor from "0.057" to "0.082", and change the Mass Wall U-Factor from "0.098" to "0.141".
Section N1102.2.6 (R402.2.6) Steel-frame ceilings, walls, and floors. After the first occurrence of the word "of" insert "Table N1102.1.2 or".
Section N1102.4.1.1 (R402.4.1.1) Installation.
Add the words "and visual inspection option." after the word "Installation" in the section title. Add the words "and be field verified." after the word "construction".
Section N1103.5.3 (R403.5.3) Hot water pipe insulation (Prescriptive).
Delete the word "Prescriptive" and replace it with the word "Optional" in the section title. Before the first sentence insert "Where required by the building official,". Before the words "All remaining piping" insert "Where required by the building official,"
Section N1103.6 (R403.6) Mechanical Ventilation (Mandatory)
Delete the word "Mandatory" and replace it with the word "Optional" in the section title. Delete "The building shall be provided with ventilation that meets" and replace with "Buildings provided with ventilation shall meet".
Section N1103.10 (R403.10) Pools and permanent spa energy consumption (Mandatory)
Delete the word "Mandatory" and replace it with the word "Optional" in the section title. Before the first sentence insert "Where required by the building official,"
Section N1104 Electrical Power and Lighting Systems (Mandatory).
Delete the word "Mandatory" and replace it with the word "Optional" in the section title.
Section N1104.1 (R404.1) Lighting equipment (Mandatory).
Delete the word "Mandatory" and replace it with the word "Optional" in the section title. Before the first sentence insert "Where required by the building official,"
Section P2603.5.1 Sewer depth.
Delete "[NUMBER]" in two places and insert "twelve inches" in two places.
Section E3403.2 Inspection Required.
Insert the words "where required" after the words "shall be inspected".
Section AE304.3.2.1 Investigation.
Before the first sentence insert "Where required by the building official,"
Section AE304.3.2.2 Fee.
Before the first sentence insert "Where required by the building official,"
Section AE305.5.1 Structural inspections for the manufactured home installation.
At the end of the section insert "Exception: The inspections required by this section shall not apply to manufactured homes as exempted by the State of Tennessee but shall apply to any construction or installation of decks, porches, steps or other structures or equipment. All manufactured homes shall pass a final inspection and have a certificate of occupancy issued."
Section AF103.5.3 Vent pipe.
At the end of the section insert "Exception: The vent pipe shall be allowed to terminate in the attic and may be capped unless tests verify the radon potential to be 4 pCi/L or greater."
Section AF103.6.1 Vent pipe.
At the end of the section insert "Exception: The vent pipe shall be allowed to terminate in the attic and may be capped unless tests verify the radon potential to be 4 pCi/L or greater."
Section AF103.12 Power source.
Delete Section AF103.12 in its entirety.
(1996 Code, § 4-1002, as replaced by Ord. #2009-15, Sept. 2009, Ord. #2013-17, Dec. 2013, and Ord. #2024-03, May 2024 Ch17_06-18-24)