Article III Residential Code

Section R105.2 Work exempt from permit is hereby amended by the deletion of item 10 under Building in its entirety.

Section R105.2 Work Exempt from Permit Building 1, is hereby amended in its entirety to read as follows:

Section R105.2 Work Exempt from Permit.

Building:

One-story detached accessory structures used as tool and storage sheds, playhouses, and similar uses, provided the floor area does not exceed 160 square feet.

(Ord. No. 24-6, 9/3/2024)

6-49 Application for permit.

Section R105.3, Permits, Application for permit, of the International Residential Code adopted in this article, is hereby amended by the addition of the following subparagraphs:

Section R105.3

In the event land other than that specified in subparagraph (2) above is to be utilized by the contractor or applicant for storage of construction materials or for the parking of vehicles, office trailers or other equipment, applicant shall provide written authorization from the owner of such other land for such use, specifying the type and term of the use being authorized.

Be accompanied by a recent site survey or plat, and legal description of the proposed building site or property, prepared by a registered land surveyor, licensed to practice in the state of Colorado at the time of application for a building permit. The plat or survey shall show all existing features, improvements, landscaping, water features, wetlands, topographic lines spaced no greater than two feet, etc. The surveyor making the plat shall certify thereon that it is correct and that the perimeter monuments described therein have been placed as described, and affix his name and seal. The plat submitted shall reflect the type of monument set on the property corners and the location and dimension of all easements or right-of-ways of record or known to exist, except when a building permit is sought to reconstruct or remodel totally within the limits of an existing building or structure.

10.

Be accompanied by a letter from the Crested Butte Fire Protection District (CBFPD) stating that the proposed project is in conformance with the provisions of Chapter 8, Article I, of the Mt. Crested Butte Code and that access roads, water supply and any other fire prevention and fire suppression requirements have been provided.

11.

Be accompanied by a Construction Management Plan (CMP) demonstrating how the impacts of the proposed project to the community will be minimized. The CMP shall include a site plan and narrative demonstrating compliance with the following:

Parking: The site plan must show the location of all job site related vehicles, including number and location of requested street parking spaces, locations for material storage, and construction equipment. If parking is permitted in the right-of-way, all parking must be on the same side of the street and approved by the Town. No parking will be allowed on driveways other than the project lot without the expressed written consent of said property owner. The plan must demonstrate parking for employees, equipment and delivery vehicles, and must also include the maximum number of vehicles expected to be on site at any given time. On-street parking within the town's rights-of-way is prohibited between the dates of November 15 and April 15.

Staging of Materials: The plan shall specify construction staging area locations. All staging must be onsite unless expressed written consent is given to stage elsewhere. Loose job material storage is not permitted in public right-of-way under any circumstances.

Cleaning of Roads: Mud tracking ramps and tire washout stations are required. Location and operation procedures shall be described in plans. At the end of the work day all public roads must be clear of dust, mud, water, etc., which is due to construction. Failure to do so will result in the Town of Mt. Crested Butte sweeping the roads at the contractor's expense.

(d)

Trash, Toilet Facilities, and Temporary Office Trailer: All food related trash on site must be stored in a bear proof dumpster pursuant to Ordinance 6 Series 2007 in the Mt. Crested Butte Town Code. All sites must be free of trash and refuse at all times. Construction trailers, portable restrooms, and dumpster locations shall be clearly designated on the project's site plan. All temporary structures must be stored on private property and not in the public right-of-way. The Town may approve a written request for the temporary placement of construction trailers, portable restrooms, dumpster and other similar items associated with construction.

(e)

Temporary Safety Fencing: The Town may require construction areas to have a non-removable construction fence of other approved device securely placed around the areas to be protected.

(f)

Hours of Construction: A person commits the crime of disturbing the peace if in a public or private place he/she performs any construction work, including but not limited to pile drivers, chainsaws, and other loud equipment: between the hours of 7:00 p.m. and 7:00 a.m., Monday through Friday, 6:00 p.m. to 7:00 a.m. Saturday, and 5:00 p.m. to 10:00 a.m. on Sundays.

(g)

Pets: All pets must be controlled and securely tied up at all times. Under no circumstances shall pets be allowed to move about freely on a site.

(h)

Adjoining Properties: No person shall excavate on land close enough to a property line to endanger any adjacent public street, sidewalk, other public or private property, or easement, without supporting and protecting the property from any damage that might result from construction operations.

(i)

Traffic Control: Any temporary blockage of traffic due to construction must be first approved by the Town of Mt. Crested Butte's Police and Maintenance departments. If traffic is to be blocked, certified flaggers must be used to control traffic.

(j)

Concrete Washout Stations: On site concrete washout stations are required and locations and procedures shall be described in Construction Management Plan (CMP).

(k)

Temporary Lighting Plan: Any temporary lighting used on site must be approved by Town staff.

(l)

Snow Storage and Snow Removal Plan: Snow should be generally stored on site. If stored off site the CMP must identify the location of the off site snow storage and include approval of the property owner on which the snow is stored. Snow is not permitted to be stored in the Town right-of-way. The general contractor is responsible for clean-up and drainage control.

(m)

Dust Mitigation: Cover material shall be required for piles of dirt and areas where the groundcover has been disturbed and not yet re-vegetated unless such piles of dirt and disturbed areas are actively used in on going construction activities.

(n)

Dust Control: Dust control for the project site and any staging or parking areas shall be required. On any disturbed areas determined by the building official to be causing significant fugitive dust to go into the atmosphere, the dust control procedures will be used to control fugitive dust from entering the atmosphere. Procedures may include, but not be limited to, the application of water, magnesium chloride, or other dust inhibitor, and the cleaning of streets or paved surfaces where dirt and mud was deposited by vehicles or equipment from the project site or staging area.

(o)

Sediment and Erosion Control: The main objective of the storm water management plan shall be to identify Best Management Practices which will minimize erosion and sediment transport. The following apply:

Stock piles must be protected with erosion control devices.

ii.

City inlets, gutters, swales, and irrigation ditches shall be protected with erosion control devices and such protection shall be maintained for the duration of the project.

iii.

A description of procedures used to protect and maintain in good and effective operating condition the erosion/sediment control measures until final stabilization is required.

iv.

Temporary Drainage Plan. As site conditions change during the construction process, temporary drainage and erosion control will be required. The contractor is responsible for outlining what kind of drainage and erosion control is warranted for various stages of the work such as excavation, foundation, driveway access, grading, etc.

(p)

Topsoil Retention: Topsoil must be retained and protected to use after development of the site.

12.

Gunnison County Building Contractor License.

All building permit applications for new construction shall include proof of a current Gunnison County Building Contractor license. The license shall be the type (Class A, Class B or Class C) associated with the scope of work for the building permit application.

All building permit applications for additions and Reconstructions per Appendix AJ of the International Residential Code (IRC) shall include proof of a current Gunnison County Building Contractor license. The license shall be the type (Class A, Class B or Class C) associated with the scope of work for the building permit application. The building official shall have the discretion to waive this requirement.

Exemption: Property owners acting as their own contractor who provide proof of passing the contractor test associated with the Gunnison County contractor license.

13.

Evidence of Tap Fee Payment Required. The building official shall not issue any building permit which would approve a building project that requires new or additional facilities to be tapped into the Mt. Crested Butte Water and Sanitation District's water and/or sewage system without first receiving satisfactory evidence from the Mt. Crested Butte Water and Sanitation District that all required tap fees have been paid or a written waiver, signed by the district's superintendent or his duly authorized representative.

(Ord. No. 24-6, 9/3/2024)

6-50 Permit expiration and revocation.

Section R105.5, Permits, Expiration, of the International Residential Code adopted in this article, is hereby amended by the addition of the following paragraphs:

Section R105.5 Permits Expiration.

Before work on an expired permit can be recommenced, a new permit shall be obtained to do so, and the fee shall be one half the amount required for a new permit for such work, provided no changes have been made or will be made in the original plans and specifications for such work; and provided further that such suspension or abandonment has not exceeded 270 days. In order to renew action on a permit after work has been suspended or abandoned for more than 270 days, the permittee shall pay a new full permit fee.

All buildings, structures or work whose permit has expired and for which no application for renewal has been made, are to be considered dangerous buildings. All such unsafe buildings are hereby declared to be public nuisances and shall be abated by repair, rehabilitation, demolition or removal in accordance with the procedure specified in this chapter providing for the abatement of dangerous buildings.

In consideration of the short building season and the resort aspect of the community in Mt. Crested Butte, contractors are encouraged to complete the exterior portion of buildings before the winter season.

Section R105.6, Permits, Suspension or Revocation, of the International Residential Code adopted in this article, is hereby amended in its entirety as follows:

Section R105.6, Permits, Suspension or Revocation.

The building official is authorized to suspend or revoke a permit issued under the provisions of this code wherever the permit is issued in error, or on the basis of incorrect, inaccurate or incomplete information, or where the work being performed authorized under the permit is found to be in violation of any terms or conditions placed upon issuance of the permit by the building official, or in violation of any ordinance or regulation or any of the provisions of this code.

(Ord. No. 24-6, 9/3/2024)

6-51 Phased approval.

Section R106.3.3, Phased Approval, Construction Documents, of the International Residential Code adopted in this article, is hereby deleted in its entirety.

(Ord. No. 24-6, 9/3/2024)

6-52 Fees.

Section R108.2, Fees, Schedule of permit fees, of the International Residential Code adopted in this article, is hereby amended in its entirety to read as follows:

Section R108.2, Fees, Schedule of permit fees.

On buildings, structures, or alterations requiring a permit, a fee for each permit shall be paid as required in accordance with Table R1-A.

TABLE R1-A — BUILDING PERMIT FEES
TOTAL VALUATION	FEE
$1.00 to $500.00	$23.50
$501.00 to $2000.00	$23.50 for the first $500.00 plus $3.05 for each additional $100.00, or fraction thereof, to and including $2000.00
$2001.00 to $25,000.00	$69.25 for the first $2000.00 plus $14.00 for each additional $1000.00, or fraction thereof, to and including $25,000.00
$25,001.00 to $50,000.00	$391.75 for the first $25,000.00 plus $10.10 for each additional $1000.00, or fraction thereof, to and including $50,000.00
$50,001.00 to $100,000.00	$643.75 for the first $$50,000.00 plus $7.00 for each additional $1,000.00, or fraction thereof, to and including $100,000.00
$100,001.00 to $500,000.00	$993.75 for the first $100,000.00 plus $5.60 for each additional $1,000.00, or fraction thereof, to and including $500,000.00
$500,001.00 to $1,000,000.00	$3,233.75 for the first $500,000.00 plus $4.75 for each additional $1000.00, or fraction thereof, to and including $1,000,000.00
$1,000,001.00 and up	$5,608.75 for the first $1,000,000.00 plus $3.65 for each additional $1,000.00, or fraction thereof.

Section R108.3, Fees, Building permit valuations, of the International Residential Code adopted in this article, is hereby amended in its entirety to read as follows:

Section R108.3, Fees, Building permit valuations.

The applicant for a permit for new construction, alteration, repair, moving an existing structure, or building demolition, or to change the occupancy of a building or structure, shall provide an estimated permit value at the time of application. Permit valuations shall include the total valuation of work for which a permit is being issued. Total valuation shall mean the valuation of the entire project excluding land, design costs (architecture and engineering), water and sewer tap fees, and building permit fees. If, in the opinion of the Building Official, the valuation provided by the applicant is underestimated, a permit shall be denied until such time as the applicant can provide additional evidence supporting the estimates of value which are approved by the Building Official. The final permit valuation shall be determined by the Building Official. The Building Official reserves the right to require a financial audit and to request any and all applicable records relating to the actual value of labor and materials for which a permit has been issued prior to the issuance of a Certificate of Occupancy or the date of approval of the final inspection, if the issuance of a Certificate of Occupancy is not required. In the event that the Building Official determines the actual value of the work performed pursuant to the permit is greater than as estimated on the application, the applicant shall pay any additional permit fees and deposits due on the additional value of the work.

Section R108.4, Fees, Related fees, of the International Residential Code adopted in this article, is hereby amended in its entirety to read as follows:

Section R108.4, Fees, Related fees.

A Plan Check Fee shall be paid at the time of submitting the submittal documents for plan review. Said Plan Check Fee shall be 65 percent of the Building Permit Fee as shown in Table 1-A.

The Plan Check Fee specified in this section is a separate fee from the permit fee specified in Section 108.2 and are in addition to the permit fee.

When submittal documents are incomplete or changed so as to require additional plan review or when the project involves deferred submittal items, an additional plan review fee shall be charged at the rate shown in Table 1-A.

In the event that plan check costs exceed said fee collected, a fee in the amount necessary to cover all costs incurred will be charged.

In the event that the building official determines that the use of outside consultants is necessary to perform required inspections, a fee in the amount necessary to cover all costs incurred will be charged.

(d)

Section R108.5, Refunds, Fees, of the International Residential Code adopted in this article, is hereby amended to read as follows:

Section R108.5, Refunds, Fees.

The building official may authorize refunding of not more than eighty (80) percent of the permit and plan check fees paid when no work has been done under a permit issued in accordance with this code. The building 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.

(e)

Section R108, Fees, of the International Residential Code adopted in this article, is hereby amended by the addition of the following subsection R108.7:

Section R108.7 Design Review Compliance and Cleanup Deposit Fees.

All persons who obtain a building permit with a valuation of $1,000.00 or more shall pay a design review compliance fee and cleanup deposit prior to obtaining a building permit. Required deposits for new construction shall follow Table 1 and required deposits for all other construction permits shall be in accordance with Table 2.

TABLE 1
Total Valuation	Compliance Fee and Cleanup Deposit
$0 - 999	$0
$1,000 - 4,999	$500
$5,000 - 9,999	$1,000
$10,000 - 49,999	$2,000
$50,000 - 999,999	3% of total valuation (including all phases of project)
$1,000,000 - 2,999,999	2% of total valuation (including all phases of project)
$3,000,000 or more	1.5% of total valuation (including all phases of project)

If in the opinion of the building official the deposit is not in sufficient amount the Building Official may require additional deposit at his or her discretion.

TABLE 2
Total Valuation	Compliance Fee and Cleanup Deposit
$0 - 999	$0
$1,000 - 4,999	$500
$5,000 - 9,999	$1,000
$10,000 - 49,999	$2,000
$50,000 or more	2% of total valuation (including all phases of project)

If in the opinion of the Building Official the deposit is not in sufficient amount the Building Official may require additional deposit at his/her discretion.

Amounts due may be paid by cash payment held by the Town, or posting a bond or other security, in the appropriate amount, forfeitable to the Town upon default hereunder. Approval of the form of security shall be at the sole discretion of the Town. The Town may apply the security, or any portion thereof, to allow the Town to complete a project, reclaim the site, or undertake such other actions as may be necessary to protect the Town and inhabitants in the event the project is abandoned. A project shall be "abandoned" under this section upon expiration of the permit or extensions issued under the terms of Sections R105.3.2 and R105.5 of this chapter.

50% of the Design Review Compliance and Cleanup Deposit may be refunded upon substantial design review completion. Design review completion shall include but not be limited to, at minimum, issuance of a certificate of occupancy for the entire structure(s), exterior finishes and installation of landscaping as required by design review and this code. At the Town's discretion, the Town may refund additional deposit funds based on completeness of project.

The job site shall be kept clean and orderly at all times, and if it becomes necessary for the Town of Mt. Crested Butte to clean and/or haul debris or material from the site during construction, the fee for such services may be deducted from this deposit.

All construction debris shall be stored in one general location and shall be removed from the site weekly.

Open burning of construction debris is prohibited. Permits for open burning may be issued in accordance with Chapter 8, Article II, of the Mt. Crested Butte Code.

The remainder of the Design Review Compliance and Cleanup Deposit will be refunded when, in the opinion of the Building Official:

The landscaping required by design review and this code has been established. Landscaping establishment shall include the site being void of noxious weeds. In the event that the landscaping has not established itself within a 2 year period from the initial installation or in the event that the required design review compliance and cleanup is not accomplished in a timely manner, after reasonable notice by the town to the owner of the subject property of such failure, then the town may cause such cleanup and/or design review compliance to be performed, or may cause such project or building to be abated, utilizing such deposit or bond to offset any costs incurred, and, in the event such costs exceed the deposit or bond, the town shall have a lien upon the subject property in such amount, which lien, along with all costs and attorney's fees incurred, may be enforced and foreclosed in the same manner as general mechanic's liens in the State of Colorado.

No final refund of the Design Review and Cleanup Deposit shall be given until an improvement location certificate (ILC) or plat prepared by a registered land surveyor, licensed to practice in the state of Colorado is submitted to the Town. The surveyor making the location certificate shall certify thereon that it is correct, and shall include the height and setbacks of the building as required in Chapter 21 of the Code of the Town of Mt. Crested Butte, Colorado, and that the improvements, as built, comply with the zoning requirements as detailed upon the design approval issued by the Town of Mt. Crested Butte, Colorado.

Should no inspection be requested by the original permittee who paid the deposit within 180 days of the date of the last inspection or the date of the permit issuance, the original permittee shall have forfeited their deposit to the Town. The town is authorized to grant, in writing, one or more extensions of time, for periods not more than 180 days each. The extension shall be requested in writing and justifiable cause determinant.

Should the project property experience a transfer of ownership prior to the building permit being closed, the permitee shall be deemed to have forfeited all remainder of the permitee's design review and completion deposit held by the Town. Exception: A plan is submitted to the Town to satisfy all remaining building and design review items. The plan shall be reviewed and approved by the Building Official.

(Ord. No. 24-6, 9/3/2024)

6-53 Inspections.

Section R109.1.3, Inspections, Flood plain inspections, of the International Residential Code adopted in this article, is hereby deleted in its entirety.

Section R109.3, Inspections, Inspection requests, of the International Residential Code adopted in this article, is hereby amended in its entirety to read as follows:

Section R109.3 Inspection requests.

It shall be the duty of the person doing the work authorized by a permit to notify the building official that such work is ready for inspection. Every request for inspection must be filed at least 2 working days before such inspection is desired. Such request may be in writing or by telephone.

It shall be the duty of the person requesting any inspections required by this code to provide access to, and means for, inspection of such work.

Section 109, Inspections, of the International Building Code adopted in this article is hereby amended by the addition of the following subsection:

Section 109.5, Inspections, After Hour Inspection and Reinspection Fees.

Fees for after hour inspections and regular inspections after the initial inspection and one (1) reinspection shall be in accordance with the Table R1-B:

Table R1-B Inspection Fees
Inspections outside of normal business hours. (Minimum Charge — two hours)	$47.00 per hour¹
Re-inspection Fees. (Minimum Charge - two hours)	$47.00 per hour¹
Additional plan review required by changes, additions or revisions to plans. (Minimum charge - one hour)	$47.00 per hour¹
For use of outside consultants for plan checking, inspections and enforcement action.	Actual costs²

Notes:
¹	Or the total hourly cost to the jurisdiction, whichever is the greatest. This cost shall include supervision, overhead, equipment, attorney's fees, hourly wages and fringe benefits of the employees involved.
²	Actual costs include administrative, attorney, and overhead costs.

(Ord. No. 24-6, 9/3/2024)

6-54 Certificate of occupancy.

Section R110.4, Certificate of occupancy, Temporary occupancy, of the International Residential Code adopted in this article, is hereby amended in its entirety to read as follows:

Section R110.4, Certificate of occupancy, Temporary occupancy.

If the building official finds that no substantial hazard will result from occupancy of any building or portion thereof before the same is completed; the building official may issue a Temporary Certificate of Occupancy for the use of such portion or portions of a building or structure prior to the completion of the entire building or structure. No Temporary Certificate of Occupancy shall be issued until all required fire and life safety inspections have been found to be compliant. Temporary Certificates shall have an expiration date to be set by the building official. Said expiration date may be extended by the building official upon good cause shown to such building official prior to the original expiration date.

(Ord. No. 24-6, 9/3/2024)

6-55 Definitions.

Section R202, Definitions, of the International Residential Code adopted in this article, is hereby amended to include the following definitions:

Bottom Rail.

Horizontal member of the framework running continuously along the bottom edge of a guard.

Crawl Space.

Crawl space shall mean an area under the first floor, or under a floor of the building.

Noxious Weed.

Any plant that has been declared a local noxious weed by the Town of Mt. Crested Butte.

(Ord. No. 24-6, 9/3/2024)

6-56 Ventilation.

Section. R303.3 Light, Ventilation, and Heating, Bathrooms, of the International Residential Code, is hereby deleted in its entirety and replaced with the following text:

Section R303.3 Bathrooms.

Bathrooms which include a shower or a tub or other similar moisture producing equipment rooms shall be provided with artificial light and a local exhaust system. The local minimum exhaust rates shall be determined in accordance with Section M1507. Exhaust air from the space shall be exhausted directly to the outdoors.

6-57 Emergency escape and rescue openings.

Section R303.4 Light, Ventilation, and Heating, Mechanical ventilation, of the International Residential Code, is hereby deleted in its entirety and replaced with the following text:

Section R303.4 Mechanical Ventilation.

All dwelling units shall be provided with whole-house mechanical ventilation in accordance with Section M1507.3.

(Ord. No. 24-6, 9/3/2024)

Section R310.4, Emergency Escape and Rescue Openings, Area wells, of the International Residential Code adopted in this article, is hereby amended by the addition of the following subsection:

Section R310.4.3.1, Roof snow shed.

No area well will be approved as a means of egress unless a roof section extends past the area well footprint (at a minimum one foot) sufficient to prevent snow from falling into or backing into the area well it covers. The section covering a area well egress must be high enough above grade to allow egress but should not be more than nine feet above the grade upon which the area well exits. A curb may be required around the sides of the area well used for egress above the adjacent grade to prevent snow from backing into the area well and to prevent pedestrians from inadvertently falling into the area well.

(Ord. No. 24-6, 9/3/2024)

6-58 Guards.

Section R312.1.3, Guards and Fall Protection, Opening Limitations, of the International Residential Code adopted in this article, is hereby amended by the addition of the following exception as follows:

The bottom rail of exterior open guardrails shall not have an opening which allows passage of a sphere 6 inches in diameter.

(Ord. No. 24-6, 9/3/2024)

6-59 Automatic fire sprinkler systems.

Section R313.2 Automatic Fire Sprinkler System, One- and two-family dwellings automatic fire systems, is hereby deleted in its entirety and replaced with the following text:

Section R313.2, Automatic Fire Sprinkler System.

An automatic residential fire sprinkler system shall be installed in two-family dwellings, and Townhomes. An automatic fire sprinkler shall be installed in one-family dwellings that have a gross floor area greater or equal to 4,800 square feet.

For level 3 alterations to existing structures that have a gross floor area greater or equal to 4,800 square feet shall be protected with an automatic fire protection system. For additions of 1,000 gross floor area or more to existing structures that cause the total gross floor area to equal or exceed 4,800 square feet, the entire structure shall be protected with an automatic fire protection system.

(Ord. No. 24-6, 9/3/2024)

6-60 Smoke and carbon monoxide alarms.

Section R314.1, Smoke Alarms, General, of the International Residential Code adopted in this article is, hereby amended by the addition of the following sentence:

Where required, the smoke alarms shall meet the requirements of the International Fire Code Section 907.8.2, as identified in Chapter 8 of the Town Code.

6-61 Lower explosive gas alarm, required.

Section R315.3, Carbon Monoxide Alarms, Location, of the International Residential Code adopted in this article, is hereby deleted in its entirety and replaced with the following text:

Section R315.3, Location.

Carbon monoxide alarms in dwelling units shall be installed outside of each separate sleeping area. Such detection shall be located within 15 feet of an entrance to each room lawfully used for sleeping and audible within the sleeping room(s) it serves. Where a fuel burning appliance is located within a bedroom or its attached bathroom, carbon monoxide detection shall be installed within the bedroom. Carbon monoxide alarms shall be installed in mechanical/boiler rooms that are fuel fired and contained within their own room.

Exception: The carbon monoxide alarm is not required in the mechanical/boiler room when the equipment is in an open atmosphere within a garage.

(Ord. No. 24-6, 9/3/2024)

Chapter 3 Building Planning, of the International Residential Code adopted in this article, is hereby amended by the addition of the following section and subsection:

Section R331, Lower Explosive Gas Alarms, Where required.

All occupancies provided with propane gas service shall have an approved LEL (lower explosive level) gas detector installed at the lowest point in the crawl space, basement or lowest floor of the structure, at an approved location. LEL notification devices (sounders) must provide 75db at the pillow. (Reference NFPA 72). LEL detector notification devices (sounders) must be located on each level to ensure 75 db at each pillow (bedroom). LEL detector sounder shall not be interlinked to the household building wiring's residential early warning detectors (i.e., smokes, COs) to clear and distinct separate sound with proper dbs at the pillow are required. LEL detectors can be installed utilizing a "low voltage" system with interiors sounders to be installed in approved locations to ensure 75 dbs at each pillow.

(Ord. No. 24-6, 9/3/2024)

6-62 Footings.

Section R403.1.4, Footings, Minimum depth, of the International Residential Code adopted in this article, is hereby amended in its entirety to read as follows:

Section R403.1.4 Minimum Depth.

Footings and foundations shall be constructed of concrete and in all cases shall extend no less than 3 feet (36 inches) below finished grade unless an alternative depth is recommended by a geotechnical engineer licensed as a Professional Engineer in the State of Colorado. Footing depths may be reduced if accompanied by rigid insulation that will reduce frost penetration, designed by a registered professional engineer in the State of Colorado and subject to approval by the building official. Foundations supporting wood shall extend at least 6 inches above the adjacent finished grade. Where applicable, the depth of footings shall also conform to Section R403.1.4.1.

(Ord. No. 24-6, 9/3/2024)

6-63 Under-floor space.

Section R408.1 Under-Floor Space, Moisture Control, of the International Residential Code adopted in this article, is hereby amended in its entirety to read as follows:

Section R408.1 The under-floor space between the bottom of the floor joists and the earth under any building (except space occupied by a basement) shall be ventilated in conformance with Section R408.3 as amended in this article.

Section R408.2 Under-Floor Space, Openings for under-floor ventilation, of the International Residential Code, is hereby deleted in its entirety.

Section R408.3 Under-Floor Space, Unvented crawl space, of the International Residential Code adopted in this article, is hereby amended in its entirety to read as follows:

Section R408.3 Unvented crawl space.

The crawlspace under any building except spaces occupied by basements shall be equipped with mechanical ventilation that runs at a rate of 1.0 cubic foot per minute (cfm) for each 50 square feet of crawl space floor area. The mechanical ventilation shall be set to run continuously or on a humidistat set at not more than 35%. The ground surface shall be covered with a Class I vapor retarder. Joints of the vapor retarder shall overlap by 6 inches (152 mm) and shall be sealed or taped. The edges of the vapor retarder shall extend at least 6 inches (152 mm) up the stem wall and shall be attached and sealed to the stem wall. The crawlspace perimeter walls shall be insulated and air-scaled in accordance with the 2021 International Energy and Conservation Code.

(Ord. No. 24-6, 9/3/2024)

6-64 Minimum slab provisions.

Section R506.2.2, Concrete Floors (On Ground), Base, of the International Residential Code adopted in this article is hereby amended by the addition of the following subsection:

Section R506.2.2.1 Construction of slab on grade.

Concrete slabs on grade shall be provided with a base course and reinforced in the following manner:

Slabs shall be provided with a base course of at least 6 inches of graded gravel, crushed rock or other material approved by the building official.

Slabs on grade shall be reinforced with not less than number 6, 6-inch by 6-inch wire mesh placed into the approximate center of the pour.