The following amendments, definitions, substitutions, modifications, additions, or deletions to the International Building Code (IBC), 2021 Edition are made.
(A) Section 101.1 Title is amended to read as follows:
These regulations shall be known as the Building Code of the City of Marshalltown, hereinafter referred to as "this code". Any reference to a Section number shall mean to this code unless stated otherwise.
(B) Section 104.2 Applications and permits is amended to read as follows:
The Building Official shall receive applications, review construction documents and issue permits for the erection and alteration of buildings and structures, inspect the premises for which such permits have been issued, and enforce compliance with the provisions of this code.
(1) To obtain a permit the applicant shall first file:
(a) For the contractors required to register with the State of Iowa as a construction contractor, proof of registration must be presented to the Building Official or specified intergovernmental agency, if so designated by the Building Official.
(b) All contractors requesting a building permit shall execute and file with the Marshalltown Building Official or specified intergovernmental agency if so designated by the Building Official, a certificate of insurance written by a company authorized to transact business in the State of Iowa. Limits shall not be less than $500,000 in personal injury or death and $100,000.00 in property damage.
(c) Certificate shall be written on a standard form and carrying an endorsement naming the City of Marshalltown, Iowa, and its employees, or specified intergovernmental agency, if so designated by the Building Official, as additional insured, as its interest may appear and conditioned upon faithful performance of all duties required of such contractor by any ordinances, rules, and regulations of the City. It shall be further a condition of said certificate of insurance, that the obligator will hold the City, or specified intergovernmental agency, if so designated by the Building Official, harmless from any and all damages sustained by reason of neglect or incompetence on the part of such contractor, his/her agents or employees in the performance of the work done under a license or permit issued upon the filing of said certificate.
(d) The certificate of insurance shall be issued by December 31st of each year and shall be refilled on or before said date each subsequent year and shall be continuous full force and effect. It is the intent and purpose of said certificate of insurance to also bind the individuals, company, firm, association, or partnership, whether it is trade name, corporation, or other business association or arrangement with which the principal is associated.
(e) Homeowners working in their own principal residence shall be exempt from filing said certificate.
(2) Where a person desires to remodel or repair any residential building or structure of which they are the owner or owner of record:
(a) Such work may be done by a member of the household, without requiring the certificate of insurance otherwise required by this section.
(b) Required permits shall be necessary for all remodel or repair work.
(c) No owner or owner of record shall replace, remodel, or repair any electrical or heating on any property that they are not the owner/occupant.
(d) Plumbing in any building is required to be performed by a licensed plumbing contractor, licensed with the City of Marshalltown.
(C) Section 105.2 Work exempt from permits is amended to read as follows:
Exemptions from permit requirements of this code shall not be deemed to grant authorization for any work to be done in any manner in violation of the provisions of this code or any other laws or ordinances of this jurisdiction. Permits shall not be required for the following:
Building:
(1) One-story detached accessory structures provided that the floor area does not exceed 120 square feet; however, site approval shall be obtained from the zoning department.
(2) Fences not over 6 feet (1829 mm) high.
(3) Sidewalks and driveways not more than 30 inches (762 mm) above adjacent grade, and not over any basement or story below, and not part of any accessory route.
(4) Prefabricated swimming pools that are less than 24 inches (610 mm) deep, are not greater than 5,000 gallons (18,925 L), and are installed entirely above ground.
(5) Painting, papering, tiling, carpeting, cabinets, countertops, and similar finish work.
(6) Temporary motion picture, television, and theater stage sets and scenery.
(7) Swings and other playground equipment accessory to detached one-and-two-family dwellings.
(D) Section 105.6.1 Revocation of permit is added to read:
It shall be the permit holder's responsibility to schedule the required inspections and obtain final approvals. Failure to schedule the required inspections and receive 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 followup prior to expiration of a Temporary Certificate of Occupancy shall also be deemed a violation of this code. 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.
(E) Section 109.2 Schedule of permit fees is amended to read as follows:
Where a permit is required, a fee for each permit shall be paid as required, in accordance with the City of Marshalltown Fee Schedule as adopted.
(F) Section 109.3 Building permit valuations is amended to read as follows:
The applicant for a permit shall provide an estimated permit value at time of application. 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.
(G) Section 109.4 Work commencing before permit issuance is amended to read as follows:
Any person who commences work on a building, structure, electrical, gas, mechanical, or plumbing system before obtaining the necessary permit shall be subject to an investigation fee equal to the amount of the permit fee. The fee shall be collected whether or not a permit is issued.
(H) Section 109.6 Refunds is amended to read as follows:
The Building Official may authorize the refunding of any fee paid hereunder, which is erroneously paid or collected. The Building Code Official shall not authorize the refunding of any fee paid, except upon written application filed by the original permittee, within one hundred eighty (180) days from the date of the fee payment.
(I) Section 113.3 Qualifications is amended to read as follows:
The Board of Appeals shall consist of members who are qualified by experience and training to pass on matters pertaining to building construction and are not employees of the jurisdiction. The Board shall be appointed by the Mayor, subject to approval by the City Council. The Board shall render a decision within thirty days from the time the matter is submitted to it and shall render their decision in writing to the Building Official with a duplicate copy to the appellant. The terms of each member shall be five years provided, however, that the original appointments to the Board shall be as follows:
(1) One (1) member appointed for an initial one (1) year term.
(2) One (1) member appointed for an initial two (2) year term.
(3) One (1) member appointed for an initial three (3) year term.
(4) One (1) member appointed for an initial four (4) year term.
(5) One (1) member appointed for an initial five (5) year term.
The existing Board shall continue under current appointments.
(J) Section 116 Unsafe Structures and Equipment is deleted in its entirety. Refer to Chapter 151, Building Regulations; Dangerous Buildings of the City of Marshalltown Code of Ordinances.
(K) Section 308.5.4 Five or fewer persons receiving care in a dwelling unit is amended to read as follows:
Section 308.5.4 Eight or fewer persons receiving care in a dwelling unit. A facility such as the above within a dwelling unit and having eight or fewer persons receiving custodial care shall be classified as a Group R-3 occupancy or shall comply with the International Residential Code (IRC).
Exception:
Daycare facilities that provide custodial care for 16 or fewer persons for less than 24 hours per day in a single-family dwelling, and where registered with the State of Iowa Department of Human Services as a child development home are permitted to comply with the International Residential Code (IRC).
(L) Section 310.4.1 Care facilities within a dwelling is amended to read as follows:
Care facilities within a dwelling shall adhere to Section 308.5.4.
(M) Section 423.5 Group E occupancy is amended to read as follows:
In areas where the shelter design wind speed for tornadoes is 250 mph in accordance with Figure 304.2 (1) of ICC 500, all Group E occupancies with a program occupant load of 50 or more shall have a storm shelter constructed in accordance with Chapters 1 through 5 and 8 of ICC 500.
Exceptions:
(1) Group E day care facilities.
(2) Group E occupancies accessory to place of religious worship.
(3) Buildings meeting the requirements for shelter design in ICC 500.
(4) Accessory structures to existing Group E sites where the occupancy classification of said structures are classified as Groups A-5 and U.
(N) Section 423.5.1 Required occupant load is amended to read as follows:
The required occupant capacity of the storm shelter shall include all buildings classified as a Group E occupancy on the campus or site (whichever is larger) and shall be the greater of the following:
(1) The total occupant load of the classrooms, vocational rooms, and offices in the Group E occupancy.
(2) The occupant load of any indoor assembly space is associated with the Group E occupancy.
Exceptions:
(1) Where a new building is being added on an existing Group E site, and where the new building is not of sufficient size to accommodate the required occupant capacity of the storm shelter for all of the buildings on-site, the storm shelter shall at a minimum accommodate the required capacity for the new building.
(2) Where approved by the code official, the required occupant capacity of the shelter shall be permitted to be reduced by the occupant capacity of any existing storm shelters on the campus or site.
(O) Section 423.5.2 Location is amended to read as follows:
Storm shelters shall be located within buildings they serve, or shall be located where the maximum distance of travel from not fewer than one (1) exterior door of each building to a door of the shelter serving that building does not exceed 1,000 feet. The installation of portable buildings for utilization on the campus or site for educational purposes is considered new construction and classified as Group E occupancies.
Exception:
Existing schools undergoing alterations, additions, or construction of new accessory buildings.
(P) Section 502.1 Address identification is amended to read as follows:
New and existing buildings shall have approved address numbers, building numbers, or approved building identification placed in a position that is plainly legible and visible from the street or road fronting the property. These numbers shall be black or white and shall contrast with their background. Where required by the fire code official, address numbers shall be provided in greater dimensions or additional approved locations to facilitate emergency response. Address numbers shall be Arabic numbers or alphabetical letters. Numbers and letters shall be a minimum height and minimum stroke width as dictated by Table 502.1. where access is by means of a private road and the building cannot be viewed from the public way, a monument, pole, or other sign or means shall be used to identify the structure. Address numbers shall be maintained.
(Q) Table 502.1 Minimum height and stroke width is amended to read as follows:
Distance from the centerline of the public way (ft) | Minimum height (in) | Minimum stroke width (in) |
Less than 100 | 4 | 1/2 |
100-199 | 6 | 3/4 |
200-299 | 8 | 1 |
For each additional 100 | Increase 2 | Increase 1/2 |
(a) Exterior suite identification, minimum height shall be 4 inches and stroke width 1/2 inch.
(b) Interior suite identification, minimum height shall be 2 inches and stroke width shall be 1/4 inch.
(R) Section 716.2.6.1 Fire door hardware and closures is amended to read as follows:
Fire doors shall be latching and self or automatic-closing in accordance with this section. UL-listed hinges may only be installed on the dwelling room entry door.
Exceptions:
(1) Fire doors located in common walls separating sleeping units in Group R-1 shall be permitted without automatic- or self-closing devices.
(2) The elevator car doors and the associated hoistway enclosure doors at the floor level
(3) designated for recall in accordance with Section 3003.2 shall be permitted to remain open during Phase I emergency recall operation.
(S) Section 902.1.1.1 Fire sprinkler riser room is added:
A fire sprinkler riser room shall be separated from the electrical room. The riser room shall have no electrical panels, devices, or apparatus inside the room other than the outlets or support equipment (lighting, air compressor, and heater) required for the use of the fire sprinkler system and/or the fire alarm panel. The sprinkler riser room shall not be accessed from the electrical room, but the electrical room may be accessed from the fire sprinkler riser room.
(T) Section 902.1.5 Temperature sensor is added:
A low temperature sensor shall be provided in the fire sprinkler riser room. The low temperature sensor shall be monitored to prevent freezing.
(U) Section 903.2.8.5 Group R one- and two-family dwellings is added as follows:
An automatic residential fire sprinkler system shall be installed in one- and two-family dwellings.
Exceptions:
(1) An automatic 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 eight thousand (8,000) square feet of floor space, excluding attached garages and other enclosed areas.
(V) Section 903.2.11.1.3 Basements is amended to read as follows:
Where any portion of a basement is located more than 75 feet (22,860 mm) from openings required by Section 903.2.11.1, the basement shall be equipped throughout with an approved automatic sprinkler system.
(W) Section 903.3.1.2 NFPA 13R sprinkler systems is amended to read as follows:
Automatic sprinkler systems in Group R occupancies shall be permitted to be installed throughout in accordance with NFPA 13R where the Group R occupancy meet all of the following conditions:
(1) Four stories or fewer above grade plane.
(2) The floor level of the highest story is 35 feet (10,668 mm) or less above the lowest level of fire department vehicle access.
(3) The floor level of the lowest story is 35 feet (10,668 mm) or less below the lowest level of fire department vehicle access.
(X) Section 903.4.2 Alarms is amended to read as follows:
An approved weatherproof audible device suitable for outdoor use with 110 candela visual signal shall be connected to every automatic fire sprinkler system. Such sprinkler water-flow alarm devices shall be activated by water flow
equivalent to the flow of a single sprinkler of the smallest orifice size installed in the system. Alarm devices shall be provided on the exterior of the building in an approved location. Where a fire alarm system is installed, actuation of the automatic sprinkler system shall actuate the building fire alarm system.
(Y) Section 915.1 Carbon monoxide general is amended to read as follows:
Carbon monoxide detection shall be installed in new buildings in accordance with Sections 915.1.1 through 915.6. Carbon monoxide detection shall be installed in existing buildings in accordance with Chapter 11 of the IFC and Iowa Administrative Code 661-211.
(Z) Section 1008.3.3 Rooms and Spaces is amended to read as follows:
In the event of power supply failure, an emergency electrical system shall automatically illuminate all of the following areas:
(1) Electrical equipment rooms.
(2) Fire command centers.
(3) Fire pump rooms.
(4) Generator rooms.
(5) Public restrooms with an area greater than 400 square feet.
(6) Meeting and conference rooms with an area greater than 400 square feet.
(7) Classrooms in a Group E occupancy with an area greater than 400 square feet.
(AA) Section 1009.2 Continuity and components is amended to read as follows:
Each required accessible means of egress shall be continuous to a public way and shall consist of one or more of the following components:
(1) Accessible routes comply with Section 1104.
(2) Interior exit stairways comply with Sections 1009.3 and 1023.
(3) Exit access stairways complying with Sections 1009.3 and 1019.3 or 1019.4.
(4) Exterior exit stairways comply with Sections 1009.3 and 1027 and serving levels other than the level of exit discharge.
(5) Elevators complying with Section 1009.4.
(6) Platform lifts comply with Section 1009.5.
(7) Horizontal exits comply with Section 1026.
(8) Ramps complying with Section 1012.
(9) Areas of refuge complying with Section 1009.6.
(10) Exterior areas for assisted rescue comply with Section 1009.7 serving exits at the level of exit discharge.
(11) Components of exterior surfaces shall be concrete, asphalt, or other approved hard surfaces.
(BB) Section 1010.1.6.1 Landings is added:
For landings required by Section 1010.1.5 to be at the same elevation on each side of the door, exterior landings at doors shall be provided with frost protection.
(CC) Section 1010.2.2 Hardware is amended to read as follows:
Door handles, pulls, latches, locks, and other operating devices on doors required by Chapter 11 shall not require tight grasping, tight pinching, or twisting of the wrist to operate. Thumb turn locks shall not be allowed.
(DD) Section 1013.1.1 Additional exit signs is added:
Exit signs may be required at the discretion of the Administrative Official to clarify an exit or exit access.
(EE) Sections 1013.5, 1013.6, 1013.6.1, 1013.6.2, and 1013.6.3 are deleted.
(FF) Section 1028.5.1 Components of exterior walking surfaces is added:
Components of exterior walking surfaces shall be concrete, asphalt, or other approved hard surfaces.
(GG) Section 1301.1 Scope is amended to read as follows:
The provisions of the International Energy 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 Chapter 1 of the current State adoption of the IECC and these regulations shall be known as the City of Marshalltown Energy Code.
(HH) Section 1608.2 Ground snow loads is amended to read as follows:
For the 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.
(II) Section 1609.1.1 Determination of wind loads is amended to read as follows:
For the 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 1609.3(1) shall be used.
(JJ) Section 1807.1 Foundation retaining walls for Group R occupancies is amended to read as follows:
Foundation walls shall be designed and constructed in accordance with Sections 1807.1.1 through 1807.1.6. Foundation walls shall be supported by foundations designed in accordance with Section 1808.
(1) Scope: Notwithstanding other design requirements of Chapters 18, 19, and 21 of the IBC, foundation retaining walls for Group R occupancies of Type V construction may be constructed in accordance with this section, provided that the use or building site conditions affecting such walls are within the limitations specified in this section.
(2) Specifications. General specifications for such foundation retaining walls shall be as follows:
Table 1801.7 - Foundation Walls for Conventional Light Frame Construction | ||||||
Height of foundation wall (Net measured from top of basement slab to top of foundation wall)* | Thickness of foundation walls Unit | Reinforcement type and placement within foundation wall | Reinforcement type and placement within foundation wall** (maximum 12' span between comers and | Type of mortar | ||
Gross | Net | Concrete | Masonry | Concrete | Masonry | Masonry |
Table 1801.7 - Foundation Walls for Conventional Light Frame Construction | ||||||
Height of foundation wall (Net measured from top of basement slab to top of foundation wall)* | Thickness of foundation walls Unit | Reinforcement type and placement within foundation wall | Reinforcement type and placement within foundation wall** (maximum 12' span between comers and | Type of mortar | ||
Gross | Net | Concrete | Masonry | Concrete | Masonry | Masonry |
8 | 7'8" | 7 1/2" | 8" | 1/2" horizontal bars, placement in the middle, and near the top & bottom - Y2" bars @ 6' max vertically | 0.075 square inch bar 8' o.c. vertically in fully grouted cells. If block is 12" nominal thickness, maybe unreinforced. | Type M or S grout & mortar shall meet provisions of Chapter 21 IBC |
9 | 8'8" | 8" | See Chapter 18 IBC | 1/2" bars 2' o.c. horizontally & 20" vertically o.c. | See Chapter 18 IBC | Same as above |
10 | 9'8" | 8" | See Chapter 18 IBC | 5/8" bars 2" o.c. horizontally & 30" vertically o.c. | See Chapter 18 IBC | Same as above |
• Concrete floor slabs to be nominal 4". If such floor slab is not provided prior to backfill, provide 1.) 36" embedded in the footing at maximum 7' o.c. spacing and/or; 2.) Full depth nominal 2" depth x 4" width keyway in footing. • All reinforcement bars shall meet ASTM A6175 grade 40 minimum and deformed. Placement of the center of wall and meet the provisions of Chapters 18, 19, and 20 of the IBC. | ||||||
NOTE: Cast in place concrete shall have a compressive strength of 3,000 lbs. at 30 days. Footings shall reinforcement of minimum of 2 - 1/2" diameter rebar throughout. Placement of reinforcement and requirements of Chapter 19 of the IBC. | ||||||
NOTE: Material used for backfilling shall be carefully placed granular soil of average or high drained with approved drainage system as prescribed in Section 1805.4 of the IBC containing a high percentage of clay, fine silt, or similar materials of low permeability or expansive soils where backfilled materials are not drained or an unusually high surcharge is to be placed adjacent to the designed wall shall be required. | ||||||
NOTE: Foundation plate of sill anchorage shall be installed in accordance with the respective codes as applicable. | ||||||
(KK) Section 1809 - Table 1809.7 Foundation for stud bearing walls is amended to read as follows:
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 |
(LL) Chapters 27, 28, and 29 are deleted in their entirety.
(Ord. 15071, passed 9-25-2023)