Pursuant to published notice and public hearing, as required by law, the International Residential Code, 2018 Edition, published by the International Code Council, is hereby adopted in full, including Appendix Chapters E, H, J, and O, except for such portions as may hereinafter be deleted, modified or amended. The following amendments, modifications, additions, and deletions to the International Residential Code, 2018 Edition, are hereby made:
1. Insert Section R101.1 to read City of Waukee as the applicable jurisdiction.
2. Delete Section R105.2(1) and replace as follows:
1. One-story detached accessory structures, provided the floor area does not exceed 200 square feet; however, site plan approval shall be obtained from the Development Services Department.
3. Delete Sections R105.2(2), R105.2(4), R105.2(5), and R105.2(10). Replace Section R105.2(5) with the following language:
4. Sidewalks shall be permitted and installed in accordance with approved site plan for individual lot development.
5. Amend Section R105.6 to include the addition of R105.6.1 Revocation of Permit. Insert Section 105.6.1 to read as follows:
6. Revocation of Permit. It is the permit holder’s responsibility to schedule the required inspections and obtain final approvals. Failure to schedule the required inspections and received approval of work authorized by the permit before covering said work or at completion shall result in revocation of the permit and void any associated approvals granted by the City. This failure shall also equate to working without a permit in violation of City ordinance and no future permits shall be issued to any person or company who has outstanding violations of this code or any other laws or ordinances of the City. Failure to contact the City for any inspection or follow-up prior to expiration of a permit shall be deemed a violation of this code section. Failure to contact the City for any inspection or follow-up prior to expiration of a temporary certificate of occupancy shall also be deemed a violation of this code section. Allowing occupancy of a structure, for which a person or company holds a building permit, prior to or without a valid certificate of occupancy (temporary or final) shall be deemed a violation of this code section and no future permits shall be issued to any person or company who has outstanding violations of this code or any other laws or ordinances of the City.
7. Add the following to Section R108.2 Schedule of Permit Fees with the following language:
8. Permit fees will be derived from the City of Waukee Fee Schedule adopted on an annual basis.
9. Add the following to Section R108.3:
The Building Valuation will be derived from the construction costs for the total work submitted by the contractor, or the most current Building Valuation Data Schedule published by the International Code Council (ICC). Submitted contractor valuation shall not be less than derived valuation through ICC.
Published data is utilized by the Administrative Official in an effort to maintain consistency and fairness for permit fee calculations. It is not intended to reflect actual taxable value.
The method for determining the value of the additional listed residential items will be as follows: The square foot of the listed structure, times the Dwelling - Type V – Wood Frame value, times the percentage multiplier assigned to each listed item.
1. Open Decks – 8%
2. Screened Porches – 15%
3. In-Ground Pools – 17%
4. Above-Ground Pools – 8%
5. Three-Season Porches – 50%
10. Amend Section R108.5 to read as follows:
Fee Refunds. The administrative official may authorize refunding of any fee paid hereunder which was erroneously paid or collected.
The administrative official may authorize refunding of not more than 80 percent of the permit fee paid when no work has been done under a permit issued in accordance with this code.
The administrative official may authorize refunding of not more than 80 percent of the plan review fee paid when an application for a permit for which a plan review fee has been paid is withdrawn or canceled before any plan reviewing is done.
The administrative official shall not authorize refunding of any fee paid except on written application filed by the original permittee not later than 180 days after the date of fee payment.
11. In Section R110.1, to add the following at the end of the paragraph:
On all new construction, all necessary walks, drives and approaches, and all seeding and sodding are to be installed before a final Certificate of Occupancy is issued.
For one- and two-family residential lots, two trees (one inch caliper or greater) must also be planted.
12. Table R301.2(l) to read as follows:
Climatic and Geographic Design Criteria
Ground Snow Load | WIND DESIGN | SEISMIC DESIGN CATEGORY | SUBJECT TO DAMAGE FROM | Winter Design Temp | Flood Hazards | Air Freezing Index | Mean Annual Temp | ||||||
Speed MPH | Topographic Effects | Special Wind Region | Wind-Borne Debris Zone | Weathering | Frost Line Depth | Termite | Ice Barrier Underlayment Required | ||||||
30 PSF | 115 | NO | NO | NO | A | SEVERE | 42 | MODERATE | 0 | YES | Dec. 2007 | 2000 | 48.6 |
13. In Section R301.2.1.3 add the following:
For purposes of determining wind loads, the minimum basic wind speed shall be considered as 115 miles per hour, except when referenced documents are based on fastest mile wind velocities, Table R301.2(1) shall be used.
14. In Section R301.2.3 add the following:
For purposes of determining snow loads, the minimum ground snow load for design purposes shall be 30 pounds per square foot. Subsequent increases or decreases shall be allowed as otherwise provided in this code, except that the minimum allowable flat roof snow load may be reduced to not less than 80 percent of the ground snow load.
15. Amend Section R302.3 to read:
For purposes of fire-resistive separation, two-family dwelling units shall be considered as townhouses and shall be constructed in accordance with R302.2.
16. Modify IRC Table 302.6 and replace with the following table:
17. TABLE R302.6
18. DWELLING-GARAGE SEPARATION
1. SEPARATION | 1. MATERIAL | |
1. From the residence and attics | 2. Not less than 5/8-inch “X” gypsum board or equivalent applied to the garage side | |
1. From habitable rooms above the garage and structure(s) supporting floor/ceiling assemblies used for separation required by this section | 3. Not less than 5/8-inch “X” gypsum board or equivalent | |
1. Garages located less than 5 feet from a dwelling unit on the same lot | 4. Not less than 5/8-inch “X” gypsum board or equivalent applied to the interior side of exterior walls and ceilings within the garage |
1. For SI: 1 inch = 25.4mm, 1 foot = 304.8 mm.
19. Delete Section R302.13.
20. Amend Section R305.1.1 Exception to read:
Except basements not having a height as specified in this section are allowed to be finished with a ceiling height that is not decreased more than the minimal measurement created by applying a finished ceiling of gypsum board or acoustical ceiling tiles.
21. Amend Section R310.2.2 to add the following exception:
A landing may be provided to meet the maximum sill height of 44 inches above the floor or landing provided. The landing shall be not less than 36 inches wide, not less than 12 inches out from the exterior wall, and not more than 24 inches in height. The landing shall be permanently affixed to the floor below or the wall under the window it serves.
22. Amend Section R310.6 Exception to read:
23. New habitable spaces created in an existing basement shall be provided with emergency escape and rescue openings in accordance with Section R310.1.
24. Amend Section R311.3.2 Exception to read:
25. A top landing is not required where a stairway of not more than four rises is located on the exterior side of a door, provided the door does not swing over the stairway.
26. Amend Section R311.7.5.1 to add Exception 3 with the following language:
The dimension of the top and bottom riser of a stair may vary up to one inch (25.4 mm) from the stairway riser dimension; however, in no case shall the riser height exceed seven and three-quarter inches.
27. Amend Section R311.7.8.4 to add Exception 3 with the following language:
28. Handrails within a dwelling unit or serving an individual dwelling unit shall be permitted to be interrupted at one location in a straight stair when the rail terminates into a wall or ledge and is offset and immediately continues.
29. Delete Section R313.1 and replace with the following:
313.1 Townhouses automatic fire sprinkler systems. An automatic residential fire sprinkler system shall be installed in townhouses.
Exceptions:
1. An automatic residential fire sprinkler system shall not be required where additions or alterations are made to existing townhouses that do not have an automatic residential fire sprinkler system installed.
2. Townhouse structures where the conditioned square footage of the entire building is less than 12,000 square feet. For purposes of this section, conditioned space shall be defined as space that can be occupied but shall not include garages or attics.
3. For townhouses under 12,000 square feet, both a front and rear egress shall be provided; otherwise, an automatic residential fire sprinkler system shall be installed.
30. Delete Section R313.2 and replace with the following:
313.2 One and two-family dwelling automatic fire sprinkler systems. An automatic residential fire sprinkler system shall be installed in one- and two-family dwellings.
Exceptions:
1. An automatic residential fire sprinkler system shall not be required where additions or alterations are made to existing buildings that are not already provided with an automatic residential fire sprinkler system.
2. One- and two-family dwellings containing less than 8,000 square feet of floor space, excluding attached garages and other unenclosed areas.
31. Amend Section R317.1 to add the following:
8. Fences. Residential fences shall be chain link, ornamental iron, PVC/composite, or approved wood not more than six feet higher than grade at the fence line. The face of the fence shall be equally attractive on both sides. However, if one side of the fence is considered less attractive because of structural members, etc., the less desirable side of the fence shall be directed toward the developing property or away from the public thoroughfare. Wood used in fences shall be treated wood, or approved wood of natural resistance to decay.
32. Replace Table R403.1(1), (2), (3) with the following:
TABLE R403.1
FOUNDATIONS FOR STUD BEARING WALLS
Number of Stories | Thickness of Foundation Walls Unit Concrete Masonry | Minimum Width of Footing (inches) | Thickness of Footing (inches) | Minimum Depth of Foundation Below Natural Surface of Ground and Finish Grade (inches) | |
1 | 8 | 8 | 16 | 8 | 42 |
2 | 8 | 8 | 16 | 8 | 42 |
3 | 10 | 10 | 18 | 12 | 42 |
33. Delete Section R403.1.4.1 Exception 1 and replace with the following:
Accessory structures up to 200 square feet may be constructed on a four-inch wood deck or four-inch concrete slab. Protection for detached garages and other accessory structures 600 square feet or less in size, with a maximum height or 18 feet, located more than 10 feet from a dwelling, attached garage, or other principal structures, may be accomplished with a floating slab (monolithic). The floating slab shall include a thickened slab edge or a minimum 18 inches thick. Twelve inches of the thickened slab shall be below grade and six inches shall be above finished grade. The bottom portion of the thickened slab area shall be 12 by 12 inches. Two #4 rebar shall be placed within the thickened edge continuous around the perimeter of the slab. The floor shall be Portland cement concrete not less than four-inches thick. Garage floor areas shall have all sod or debris removed. For detached garages and accessory structures exceeding 600 square feet, a frost protected footing and foundation shall be required.
34. Delete Section R403.1.4.1 Exception 2.
35. Amend Section R404.1 to add the following:
1. Scope. Notwithstanding other design requirements of Sections R404.1 - R404.1.5.2 of the International Residential Code, foundation retaining walls for one- and two-family dwelling occupancies of Type V construction may be constructed in accordance with this section, provided that use or building site conditions affecting such walls are within the limitations specified in this section. Concrete foundation walls shall be selected and constructed in accordance with the provisions of Section R404.1.3. Masonry foundation walls shall be selected and constructed in accordance with the provisions of Section R404.1.2. If backfill prior to a poured in place floor slab is desired, one of the following methods to provide bottom lateral support shall be completed:
(1) A full depth (minimum 1-1/2”) nominal 2” x 4” keyway may be formed into the footings to secure the bottom of the foundation wall; or,
(2) 36” long vertical #4 rebar may be embedded a minimum of 6” into the footings not to exceed 7’ on center spacing.
36. Amend Code to Add Code Section: IRC R404.1.3.2.3 Insert the following language and table:
37. R404.1.3.2.3 Foundation Walls for Conventional Light Frame Wood Construction. Concrete and masonry foundation walls shall be permitted to be designed in accordance with the following Table ‘Foundation Walls for Conventional Light Frame Construction’ may be used: Table R404.1.3.2.3 – ‘Foundation Walls for Conventional Light Frame Construction’
1. Table R404.1.3.2.3 – ‘Foundation Walls for Conventional Light Frame Construction’
1. Height of Foundation Wall (Net measured from top of basement slab to top of foundation wall)* | 1. Thickness of Foundation Walls | 1. Reinforcement Type and Placement within Foundation Wall** | 1. Reinforcement Type and Placement within Foundation Wall** (maximum 12’ span between corners and supporting cross walls) | 1. Type of Mortar | ||
1. 2. Unit1. 1. 1. | ||||||
1. Gross | 3. Net | 2. Concrete | 2. Masonry | 2. Concrete | 1. Masonry | 1. Masonry |
1. | 4. 7’ 8” | 3. 7 Y2” | 3. 8” | 3. | 2. | 2. |
1. 8 | 5. | 4. | 4. | 4. Y2” horizontal bars, placement in the middle, and near the top and bottom – Y2” bars at 6’ max vertically | 3. 0.075 square inch bar 8’ o.c. vertically in fully grouted cells. If block is 12” nominal thickness, may be unreinforced. | 3. Type M or S. Grout and Mortar shall meet provisions of Chapter 21 IBC |
1. 9 | 6. 8’ 8” | 5. 8” | 5. See Chapter 18 IBC | 5. Y2” bars 2’ o.c. horizontally and 20” vertically o.c. | 4. See Chapter 18 IBC | 4. Same as above. |
1. 10 | 7. 9’ 8” | 6. 8” | 6. See Chapter 18 IBC | 6. (5/8” bars 2’ o.c. horizontally and 30” vertically o.c.) | 5. See Chapter 18 IBC | 5. Same as above. |
1. *Concrete floor slab to be nominal 4”. If such floor slab is not provided prior to backfill, provide 1) 36” vertical embedded in the footing at maximum 7’ O.C. spacing; and/or 2) full depth nominal 2” depth x 4” width keyway in footing.
2. **All reinforcement bars shall meet ASTM A6175 grade 40 minimum and be deformed. Placement of bars shall be in the center of wall and meet the provisions of Chapter 18, 19, and 21 of the International Building Code.
3. NOTE: Cast in place concrete shall have a compressive strength of 3,000 lbs at 28 days. Footings shall contain reinforcement of minimum 2 – Y2” diameter rebar throughout. Placement of reinforcement and concrete shall meet the requirements of Chapter 19 of the International Building Code.
4. NOTE: Material used for backfilling shall be carefully placed granular soil of average or high permeability and drained with an approved drainage system as prescribed in Section 1805.4 of the International Building Code. When containing a high percentage of clay, fine silt or similar materials of low permeability or expansive soils are where backfill materials are not drained or an unusually high surcharge is to be placed adjacent to the wall, a designed wall shall be required.
5. NOTE: Foundation plate or sill anchorage shall be installed in accordance with the respective codes as applicable.
38. Amend Chapter 11 Energy Efficiency -- Energy Efficiency, of the IRC is hereby amended by deleting this chapter and inserting the following:
Provisions of the International Energy Conservation Code as currently adopted and amended by the Iowa State Building Code Bureau shall apply to all matters governing the design and construction of buildings for energy efficiency. Administration shall be prescribed in “this code” and the regulations shall be known as the Waukee Energy Code.
39. Amend Section R1601.4 to add the following:
Section 1601.4 Installation. Duct installation shall comply with Sections M1601.4.1 through M1601.4.11.
Section 1601.4.11. Air plenum and duct separation. Air plenums and ducts located in floor and wall cavities shall be separated from unconditioned spaces by construction with sufficient insulation to meet energy code requirements. These areas include but are not limited to exterior walls, cantilevered floors, and floors above garages.
40. Delete Section R G2414.5.2 (403.5.2) and replace with the following:
41. Section G2414.5.2 (403.5.2): Corrugate Stainless Steel Tubing (CSST). Only CSST with an Arc resistant jacket or covering system listed in accordance with ANSI LC-1 (Optional Section 5.16)/CSA 6.26-2016 shall be installed in accordance with the terms of its approval, the conditions of listing, the manufactures instructions and this code including electrical bonding requirements in Section G2411. CSST shall not be used for through wall penetrations from the point of delivery of the gas supply to the inside of the structure. CSST shall not be installed in locations where subject to physical damage unless protected in an approved manner.
42. Delete Section R G2414.5.4 (403.5.5) and replace with the following:
Section G2414.5.4 (403.5.5): Corrugated Stainless Steel Tubing. Arc resistant corrugated stainless steel tubing shall be listed in accordance with ANSI LC 1 (Optional Section 5.16)/CSA 6.26.
43. Amend Section P2603.5.1 Sewer Depth. Building sewers that connect to private sewage disposal systems shall not be less than 66 inches below finished grade at the point of septic tank connection or as approved by Dallas County Environmental Health. Building sewers shall not be less than 66 inches below grade.
44. Add Code Section IRC E3704.7 and insert the following language:
3704.7 Prohibited Locations. Feeders supplying a townhome shall not cross a property line other than the individual unit served. For the purposes of this provision, the term townhome shall mean a single-family dwelling unit constructed in a group of two or more attached units in which each unit extends from foundation to roof and with a yard or public way on not less than two sides.
Exception: If a recorded easement is established in a concealed space or attic within the townhome unit, feeds are allowed within the easement.