Part X
International Residential Code
§ 10-101. City adoption
(a) In general.
The International Residential Code for One- and Two-Family Dwellings (2021 Edition) is adopted as part of the Building, Fire, and Related Codes of Baltimore City, subject to the additions, deletions, amendments, and other modifications contained in this Part X.
(b) Codification.
Unless otherwise specified, chapter and section numbers in this Part X refer to the chapter and section numbers of the International Residential Code.
§ 10-102. City modifications.
The additions, deletions, amendments, and other modifications adopted by the City are as follows:
Part I
Administrative
Chapter 1
Scope and Administration
Section 101. Title, Scope, and Purpose
101.1 Title.
The regulations contained in this Code constitute and are known as the "Baltimore City Residential Code for One- and Two-Family Dwellings".
101.1.1 References to "this Code".
Throughout this Part X, all references to "this Code" refer to the Baltimore City Residential Code for One- and Two-Family Dwellings.
101.2 Scope. {As in IRC}
Exception: The following may be constructed in accordance with this Code if provided with an automatic fire sprinkler system that complies with § 313 {"Automatic Fire Sprinkler Systems"} of this Code:
1. Live/work units located in townhouses and complying with the requirements of § 508.5 {"Live/Work Units"} of the Baltimore City Building Code.
2. Owner-occupied lodging houses with 5 or fewer guestrooms and 5 or fewer total occupants.
3. A care facility with 5 or fewer persons receiving custodial, medical, or other care within a dwelling unit.
101.3 Intent. {As in IRC}
Section 102. Applicability
102.1 to 102.4 {As in IRC}
102.5 Appendices.
The appendices to the International Residential Code apply as follows.
102.5.1 Appendices adopted.
The following appendices are adopted, with or without local modifications, as part of this Code:
1. Appendix E: "Manufactured Housing Used as Dwellings".
2. Appendix F: "Passive Radon Controls".
3. Appendix G: "Piping Standards for Various Applications".
4. Appendix H: "Patio Covers".
5. Appendix K: "Sound Transmission".
6. Appendix M: "Home Day Care – R-3 Occupancy".
7. Appendix O: "Automatic Vehicular Gates".
8. Appendix Q: "Tiny Houses".
102.5.2 Appendices not adopted.
The following appendices are not adopted as part of this Code:
1. Appendices A to D.
2. Appendix I: "Private Sewage Disposal".
3. Appendix J: "Existing Buildings and Structures".
4. Appendix L: "Permit Fees".
5. Appendix N: "Venting Methods".
6. Appendix P: "Sizing of Water Piping System".
7. Appendices R to T.
102.6 to 102.7 {As in IRC}
Section 103. Department of Building Safety
103.1 General.
This Code is administered and enforced by the Department of Housing and Community Development and its Commissioner. Accordingly, in this Code:
1. "Department of Building Safety" or "Department" means the Department of Housing and Community Development, and
2. "Building Official" means the Building Official as defined in § 202.2 of the Baltimore City Building Code.
103.2 Appointment. {Not Adopted}
103.3 Deputies. {Not Adopted}
Section 104. Duties and Powers of Building Official
104.1 General.
In enforcing this Code, the Building Official may exercise all of the powers specified in § 104.1 of the Baltimore City Building Code.
104.2 Application and permits. {As in IRC}
104.3 Notices and orders. {As in IRC}
104.4 Inspections.
The Building Official must make all of the required inspections or accept reports of inspection by approved agencies or individuals. All reports of these inspections must be in writing and signed by a responsible officer of the approved agency or by the responsible individual. The Building Official may engage any expert opinion that the Building Official considers necessary to report on unusual technical issues that arise.
104.5 Identification. {As in IRC}
104.6 Right of entry.
The Building Official may enter any structure or premises at reasonable times to inspect, subject to constitutional restrictions on unreasonable searches and seizures. If entry is refused or not obtained, the Building Official may pursue recourse as provided by law, including § 104 {"...Powers of Building Official"} of the Baltimore City Building Code.
104.7 Department records. {As in IRC}
104.8 Liability. {Not Adopted. See State Courts Article § 5-302.}
104.9 Approve materials and equipment. {As in IRC}
104.10 Modifications. {As in IRC}
104.10.1 Flood hazard areas.
The Building Official may not grant modifications to any provision related to flood hazard areas without a variance having been granted under the Floodplain Management Code.
104.11 Alternative materials and methods.
The provisions of this Code are not intended to prevent the installation of any material or to prohibit any method of construction not specifically prescribed by this Code, as long as that alternative has been approved. An alternative material or
method of construction may be approved if the Building Official finds in writing that, for the purpose intended:
1. the proposed alternative is satisfactory and complies with the intent of this Code, and
2. the material, method, or work offered is at least the equivalent of that prescribed in this Code in quality, strength, effectiveness, fire resistance, durability, and safety.
104.11.1 Tests. {As in IRC}
Section 105. Permits
105.1 Required. {As in IRC}
105.1.1 Additional requirements.
In addition, a permit is required before any person may do any of the work described in § 105.1 of the Baltimore City Building Code.
105.1.2 By whom application may be made.
The application for a permit may only be made by a person authorized under:
1. § 105.1.3 {"By whom application to be made"} of the Baltimore City Building Code,
2. § 2706.2 {"Electrical: To whom issued"} and § 2707 {"Licensing requirements"} of the Baltimore City Building Code,
3. § 2802.3 {"Mechanical Systems: To whom issued"} and § 2803 {"Licensing requirements"} of the Baltimore City Building Code, and
4. § 2903.3 {"Plumbing Systems: To whom issued"} and § 2904 {"Licensing requirements"} of the Baltimore City Building Code.
105.2 Work exempt from permit.
{Introductory paragraph as in IRC}
Building:
1. to 3. {Not Adopted}
4. {As in IRC}
5. {Not Adopted}
6. to 8. {As in IRC}
9. to 10. {Not Adopted}
1. to 2. {As in IRC}
3. {Not Adopted}
4. to 5. {As in IRC}
Gas: {As in IRC}
Mechanical: {As in IRC}
105.2.1 to 105.2.3 {As in IRC}
105.3 Application for permit.
The requirements for obtaining a permit are as set forth in § 105.3 {"Application for permit"} of the Baltimore City Building Code.
105.3.1 Action on application.
The required actions by the Building Official are as set forth in § 105.3.1.1 {"General"} and § 105.3.1.2 {"Referral to assess need for traffic mitigation"} of the Baltimore City Building Code.
105.3.1.1 Determination of substantially improved or substantially damaged existing buildings in flood hazard areas.
For applications for reconstruction, rehabilitation, addition, or other improvement of an existing structure in a flood hazard area, the Building Official must examine the construction documents and prepare findings with regard to whether the structure has sustained "substantial damage"and whether the proposed improvement is a "substantial improvement", as these terms are defined in and calculated under the Floodplain Management Code. The Building Official must submit these findings to the Floodplain Manager for a determination of "substantial improvement". Applications determined by the Floodplain Manager to constitute a "substantial improvement" require full compliance with the requirements of the Floodplain Management Code.
105.3.2 Time limitation of application. {As in IRC}
105.4 Validity of permit. {As in IRC}
105.5 Expiration; extension.
Unless extended, a permit expires as set forth in § 105.5 {"Expiration; Extension"} of the Baltimore City Building Code.
105.6 Suspension or revocation.
The Building Official may suspend or revoke a permit as provided in § 105.6 {"Suspension or revocation"} of the Baltimore City Building Code.
105.7 Placement of permit. {As in IRC}
105.8 Responsibility. {As in IRC}
105.9 Preliminary inspection. {As in IRC}
Section 106. Construction Documents
106.1 Submittal documents. {As in IRC}
106.1.1 to 106.1.3 {As in IRC}
106.1.4 Information for construction in flood hazard areas. {Not Adopted}
{Note: For the establishment of Regulated Flood Hazard Areas and the special regulations and limitations governing development within those areas, see the Floodplain Management Code, City Code Article 7 {"Natural Resources"}, Division I {"Floodplain Management"}.}
106.2 to 106.5 {As in IRC}
Section 107. Temporary Structures and Uses {As in IRC}
Section 108. Fees
108.1 General.
Fees are as set forth in § 109 {"Fees"} of the Baltimore City Building Code.
108.2 to 108.6. {Not Adopted}
Section 109. Inspections
109.1 Type of inspection. {As in IRC}
109.1.1 to 109.1.2 {As in IRC}
109.1.3 Floodplain inspections.
For construction in a flood hazard area, placement of the lowest floor and before undertaking any further vertical construction, the elevation certificate required by the Floodplain Management Code must be submitted to the Building Official.
109.1.4 to 109.1.5 {As in IRC}
109.1.6 Final inspection. {As in IRC}
109.1.6.1 Elevation documentation.
For a structure in a flood hazard area, the documentation of the elevations required by the Floodplain Management Code must be submitted to the Building Official before the final inspection.
109.2 to 109.4 {As in IRC}
Section 110. Occupancy Permit; Certificate of Completion
110.1 General.
Occupancy Permits (referred to in the IRC as a "Certificate of Occupancy") and Certificates of completion are governed by § 111 {"Occupancy Permit; Certificate of Completion"} of the Baltimore City Building Code.
110.2 to 110.5. {Not Adopted}
Section 111. Service Utilities {As in IRC}
Section 112. Administrative and Judicial Review
112.1 General.
A decision of the Building Official is subject to administrative and judicial review as provided in § 128 {"Administrative and Judicial Review"} of the Baltimore City Building Code.
112.2 to 112.4 {Not Adopted}
Section 113. Violations
113.1 to 113.3 {As in IRC}
113.4 Violation penalties.
The penalties for a violation of this Code are as provided in § 114 {"Violations"} of the Baltimore City Building Code for a violation of that Code.
Section 114. Stop-Work Order
114.1 General.
The issuance and enforcement of stop-work orders are as provided in § 115 {"Stop-Work Order"} of the Baltimore City Building Code.
114.2 {Not Adopted}
Part II
Definitions
Chapter 2
Definitions
Section 201. General
201.1 Scope. {As in IRC}
201.2 Interchangeability. {As in IRC}
201.3 Terms defined in other codes.
If a term is not defined in this Code and is defined in the Baltimore City Building Code or in one or another of the standards and codes listed in § 101.4 {"Referenced Codes"} of the Baltimore City Building Code, the term has the meaning given to it in that code or standard.
201.4 Terms not defined. {As in IRC}
Section 202. Definitions
202.1 General.
Except as provided in § 202.2 of this Code, terms that are used in this Code and defined in the International Residential Code (2021 Edition) have the meanings given in the International Residential Code (2021 Edition).
202.2 Supplemental definitions Notwithstanding any different definition in the International Residential Code, the following terms have the meanings given in this § 202.2.
202.2.1 Building.
"Building" has the meaning stated in § 202.2 of the Baltimore City Building Code.
202.2.1A Cool Roof Rating Council. "Cool Roof Rating Council" or "CRRC" means the Cool Roof Rating Council, Inc., an American National Standards Institute-Accredited Standards Developer Organization, that created, maintains, and updates the American National Standard: ANSI/CRRC S100 - "Standard Test Methods for Determining Radiative Properties of Materials".
202.2.2 Flood; Flooding.
"Flood" or "flooding" has the meaning stated in City Code Article 7 {"Natural Resources"}, § 1-2 {"Definitions – "Accessory structure" to "Floodplain District"}.
202.2.3 Flood Hazard Area.
"Flood Hazard Area" means a Regulated Flood Hazard Area established under and regulated by the Floodplain Management Code.
202.2.4 Floodplain Management Code.
"Floodplain Management Code" means the Baltimore City Floodplain Management Code, City Code Article 7 {"Natural Resources"}, Division I {"Floodplain Management"}.
202.2.5 May not, etc.
"May not", "must not", and "no ... may" are each mandatory negative terms used to establish a prohibition.
202.2.6 Must/shall.
"Must" and "shall" are each mandatory terms used to express a requirement or to impose a duty.
202.2.7 Occupancy.
"Occupancy" has the meaning stated in § 202.2 of the Baltimore City Building Code.
202.2.8 Premises.
"Premises" has the meaning stated in § 202.2 of the Baltimore City Building Code.
202.2.9 Structure.
"Structure" has the meaning stated in § 202.2 of the Baltimore City Building Code.
Part III
Building Planning and Construction
Chapter 3
Building Planning
Section 301. Design Criteria
301.1 Application {As in IRC}
301.2 Climatic and geographic design criteria {As in IRC}
301.2.1 to 301.2.3 {As in IRC}
301.2.4 Floodplain construction. {Not Adopted}
{Note: For the establishment of Regulated Flood Hazard Areas and the special regulations and limitations governing development within those areas, see the Floodplain Management Code, City Code Article 7 {"Natural Resources"}, Division I {"Floodplain Management"}.}
| Ground Snow Load |
Wind Speed |
Wind Topographic Effects |
Special Wind Region |
Wind-Borne Debris Zone |
Seismic Design Category |
|---|---|---|---|---|---|
| 30 psf | 90 mph | No | No | No | B |
| Weathering |
Frost Line Depth |
Termite |
|---|---|---|
| Severe |
30" (762 mm) |
Moderate to Heavy |
|
Winter Design Temp |
Ice Barrier Underlayment Required |
Air Freezing Index |
Mean Annual Temp |
|---|---|---|---|
| 13○ F | No | 231 | 57○ F |
| Flood Hazards | |
|---|---|
|
a. Entry into National Flood Insurance Program: 3/15/78. Updated Code: 6/16/2021. b. Flood Insurance Study: Revised 6/16/2021. c. Panel numbers and dates of currently effective FIRMs: |
|
| Panels | Effective Date |
| 0001 F - 0005 F | 6/16/2021 |
| 0008 F - 0016 F | 6/16/2021 |
| 0018 G | 6/16/2021 |
| 0019 F | 4/2/14 |
| 0020 F - 0023 F | 6/16/2021 |
| 0024 G - 0025 G | 6/16/2021 |
| 0026 F - 0028 F | 4/2/14 |
| 0030 G | 6/16/2021 |
| 0031 F - 0033 F | 4/2/14 |
| 0035 F | 6/16/2021 |
| 0036 G | |
301.3 to 301.8 {As in IRC}
Section 302. Fire-Resistant Construction
302.1 Exterior walls. {As in IRC}
302.1.1 Porch roofs – Abutting.
In new construction, renovation, or replacement of a porch roof that abuts another porch roof fire-retardant-treated wood sheathing shall be installed.
302.2 to 302.14 {As in IRC}
Sections 303 to 308. {As in IRC}
Section 309. Garages and Carports
309.1 to 309.2 {As in IRC}
309.3 Flood hazard areas. {Not Adopted}
{Note: For the establishment of Regulated Flood Hazard Areas and the special regulations and limitations governing development within those areas, see the Floodplain Management Code, City Code Article 7 {"Natural Resources"}, Division I {"Floodplain Management"}.}
309.4 to 309.5 {As in IRC}
Section 310. Emergency Escape and Rescue Openings {As in IRC}
Section 311. Means of Egress
311.1 to 311.6 {As in IRC}
311.7 Stairways
311.7.1 to 311.7.4 {As in IRC}
311.7.5 Stair treads and risers. {As in IRC}
311.7.5.1 Risers.
The maximum riser height is 8¼ inches (210 mm). The riser must be measured vertically between leading edges of the adjacent treads. The greatest riser height within any flight of stairs may not exceed the smallest by more than ⅜ inch (9.5 mm). Risers must be vertical or sloped from the underside of the nosing of the tread above at an angle not more than 30 degrees (0.51 rad) from the vertical. Open risers are permitted as long as the opening between treads does not permit the passage of a 4-inch-diameter (102 mm) sphere.
Exception: The opening between adjacent treads is not limited on stairs with a total rise of 30 inches (762 mm) or less.
311.7.5.2 Treads.
The minimum tread depth is 9 inches (229 mm). The tread depth must be measured horizontally between the vertical planes of the foremost projection of adjacent treads and at a right angle to the tread's leading edge. The greatest tread depth within any flight of stairsmay not exceed the smallest by more than ⅜ inch (9.5 mm).
311.7.5.2.1 Winder treads.
Winder treads must have a minimum tread depth of 9 inches (229 mm) measured between the vertical planes of the foremost projection of adjacent treads at the intersections with the walkline. Winder treads must have a minimum tread depth of 6 inches (152 mm) at any point within the clear width of the stair. Within any flight of stairs, the largest winder tread depth at the walkline may not exceed the smallest winder tread by more than ⅜ inch (9.5 mm). Consistently shaped winders at the walkline are allowed within the same flight of stairs as rectangular treads and do not have to be within ⅜ inch (9.5 mm) of the rectangular tread depth.
311.7.5.3 to 311.7.5.4 {As in IRC}
311.7.6 to 311.7.12 {As in IRC}
311.8 Ramps {As in IRC}
Section 312. Guards and Window Fall Protection
312.1 Guards {As in IRC}
312.1.1 to 312.1.2 {As in IRC}
312.1.3 Opening limitations.
Required guards on open sides of stairways, raised floor areas, balconies, and porches:
1. must have intermediate rails or ornamental closures that do not allow passage of a sphere 4 inches (102mm) or more in diameter, and
2. may not be constructed with horizontal rails or any ornamental pattern that results in a ladder effect.
Exceptions: {As in IRC}
312.1.4 Exterior plastic composite guards. {As in IRC}
312.2 Window fall protection. {As in IRC}
Section 313. Automatic Fire Sprinkler Systems
313.1 Automatic fire sprinkler systems required.
An approved automatic residential fire sprinkler system must be installed in any new:
1. townhouse, or
2. 1- or 2-family dwelling.
313.2 Design and installation.
Automatic residential fire sprinkler systems for townhouses and 1-and 2-family dwellings must be designed and installed in accordance with Baltimore City Building Code§ 903.3 {"Installation requirements"}.
313.3 DPW regulations.
In accordance with its {rules and} regulations, the Department of Public Works must require minimum service sizes for water lines and meters for buildings with sprinklers.
Section 314. Smoke Alarms {As in IRC}
Section 315. Carbon Monoxide Alarms {As in IRC}
Sections 316 to 318. {As in IRC}
Section 319. Site Address
319.1 Address identification.
Address identification must be provided and maintained for all buildings in accordance with:
1. International Building Code§ 502 {"Building Address"}, and
2. City Code Article 26, Subtitle 6 {"Building Address Numbers"}.
Section 320. Accessibility {Not Adopted}
Section 321. Elevators and Platform Lifts {As in IRC}
Section 322. Flood-Resistant Construction {Not Adopted}
{Note: For the establishment of Regulated Flood Hazard Areas and the special regulations and limitations governing development within those areas, see the Floodplain Management Code, City Code Article 7 {"Natural Resources"}, Division I {"Floodplain Management"}.}
Section 323. Storm Shelters {As in IRC}
Section 324. Solar Energy Systems {As in IRC}
Section 325. Mezzanines {As in IRC}
Section 326. Habitable Attics {As in IRC}
Section 328. Energy Storage Systems {As in IRC}
Section 329. Stationary Engine Generators {As in IRC}
Sections 330 to 332. {Reserved}
Section 333. Driveways and Other Paved Surfaces
333.1 Driveway entrances.
All driveway entrances located on a public right-of-way must be constructed in accordance with the rules, regulations, and permit requirements of the Department of Transportation.
333.2 Surface paving.
Parking pads, driveways, and private roads must be paved with asphalt, brick, concrete, macadam, or stone block. Permeable paving systems may be utilized in accordance with the rules and regulations of the Department of Public Works. All paving must be able to support the design loads for the proposed vehicular traffic.
333.3 Parking areas.
The size, layout, and arrangement of parking areas must comply with:
1. the Baltimore City Zoning Code, and
2. the rules and regulations of the City Planning Commission.
333.4 Surface drainage.
Storm drainage off paved surface areas must be properly conveyed to paved alleys, paved streets, or other approved water courses.
333.4.1 Limitations.
No drainage may be discharged:
1. so as to run or flow over any sidewalk or footway, except at a driveway with a depressed curb, or
2. across any adjoining property.
Chapter 4
Foundations
Section 401. General
401.1 Application.
This chapter controls the design and construction of the foundation and foundation spaces for all buildings. In addition to the provisions of this chapter, the design and construction of foundations in flood hazard areas must meet the provisions of the Floodplain Management Code. Wood foundations shall be designed and installed in accordance with AF&PA PWF.
Exception: {As in IRC}
401.2 to 401.4 {As in IRC}
Sections 402 to 403. {As in IRC}
Section 404. Foundation and Retaining Walls
404.1 Concrete and masonry foundation walls. {As in IRC}
404.1.1 to 404.1.8 {As in IRC}
404.1.9 Isolated masonry piers. {As in IRC}
404.1.9.1 to 404.1.9.4 {As in IRC}
404.1.9.5 Masonry piers in flood hazard areas. {Not Adopted}
{Note: For the establishment of Regulated Flood Hazard Areas and the special regulations and limitations governing development within those areas, see the Floodplain Management Code, City Code Article 7 {"Natural Resources"}, Division I {"Floodplain Management"}.}
404.2 to 404.5 {As in IRC}
404.6 Underpinning.
Underpinning foundation walls must be in accordance with Baltimore City Building Code§ 1804.1.1 {"Underpinning foundation walls"}.
Sections 405 to 407. {As in IRC}
Section 408. Under-Floor Space
408.1 to 408.6 {As in IRC}
408.7 Flood resistance. {Not Adopted}
{Note: For the establishment of Regulated Flood Hazard Areas and the special regulations and limitations governing development within those areas, see the Floodplain Management Code, City Code Article 7 {"Natural Resources"}, Division I {"Floodplain Management"}.}
Chapter 5
Floors
[As in IRC]
Chapter 6
Wall Construction
[As in IRC]
Chapter 7
Wall Covering
[As in IRC]
Chapter 8
Roof-Ceiling Construction
Section 801. General
801.1 to 801.2 {As in IRC}
801.3 Roof drainage.
Roof drainage must be provided in accordance with Baltimore City Building Code§ 1503.4 {"Roof drainage"}.
Sections 802 to 807. {As in IRC}
Chapter 9
Roof Assemblies
Sections 901 to 904. {As in IRC}
Section 905. Requirements for Roof Coverings
905.1 to 905.17 {As in IRC}
905.18 Reflectance.
Roof Coverings over conditioned spaces on low-slope roofs (roof slope < 2:12) on newly constructed buildings and additions to existing buildings shall have a minimum 3-year-aged solar reflective index of 78, as determined by the Cool Roof Rating Council.
Exceptions:
1. An addition to a roof that supports living vegetation and includes a synthetic, high quality waterproof membrane, drainage layer, soil layer, and lightweight medium plants.
2. Roof areas used as outdoor recreation space by the occupants of the building.
3. An area including and adjacent to rooftop photovoltaic and solar thermal equipment, totaling not more than 3 times the area that is covered with photovoltaic and solar thermal equipment.
4. Limited roof areas as determined by regulations promulgated by the department of housing & community development.
5. A roof, the area of which is less than 3% of the gross floor area of the building.
905.18.1 Conflicts.
In the event of a conflict between § 905.18 of this Code and City Code Article 6 {"Historical and Architectural Preservation"}, City Code Article 6 {"Historical and Architectural Preservation"} prevails.
Sections 906 to 908. {As in IRC}
Sections 909 to 910. {Reserved}
Section 911. Rooftop Decks and Other Structures
911.1 General.
All rooftop structures must comply with Baltimore City Building Code§ 1510 {"Rooftop structures"}.
Chapter 10
Chimneys and Fireplaces
[As in IRC]
Part IV
Energy Conservation
Chapter 11
Energy Efficiency
[Not Adopted]
{MBPS Modification – Chapter 11 is replaced with the International Energy Conservation Code, as modified by Parts IX-A and IX-B of this Article.}
Part V
Mechanical
{MBPS Modification – The subject matter of Chapters 12 through 24 is not within the scope of the Maryland Building Performance Standards. See the Fuel Gas Code and Mechanical Code in Parts IV and V of this Article, and the mechanical code adopted under State Business Regulation Article § 9A-205.}
Chapter 12
Mechanical Administration
[As in IRC]
Chapter 13
General Mechanical System Requirements
Section 1301. General
1301.1 Scope. {As in IRC}
1301.1.1 Flood-resistant installation.
In flood hazard areas, mechanical appliances, equipment and systems must be located and installed in accordance with the Floodplain Management Code.
1301.2 to 1301.5 {As in IRC}
Sections 1302 to 1308. {As in IRC}
Chapter 14
Heating and Cooling Equipment and Appliances
Section 1401. General
1401.1 to 1401.4 {As in IRC}
1401.5 Flood hazard.
In flood hazard areas, heating and cooling equipment and appliances must be located and installed in accordance with the Floodplain Management Code.
Sections 1402 to 1410. {As in IRC}
Section 1411. Heating and Cooling Equipment
1411.1 to 1411.2 {As in IRC}
1411.3 Condensate disposal. {As in IRC}
1411.3.1 Auxiliary and secondary drain systems. {As in IRC}
1411.3.2 Drain pipe materials and sizes.
Components of the condensate disposal system must be cast iron, galvanized steel, copper, polyethylene, ABS, CPVC, or PVC pipe or tubing. All components must be selected for the pressure and temperature rating of the installation. Condensate waste and drain line size may not be less than ¾- inch (19 mm) internal diameter and may not decrease in size from the drain pan connection to the place of condensate disposal. Where the drain pipes from more than one unit are manifolded together for condensate drainage, the pipe or tubing must be sized in accordance with an approved method. All horizontal sections of drain piping must be installed in uniform alignment at a uniform slope.
1411.3.3 Drain line maintenance. {As in IRC}
1411.3.4 Appliances, equipment, and insulation in pans. {As in IRC}
1411.4 to 1411.8 {As in IRC}
Section 1412. Absorption Cooling Equipment {As in IRC}
Section 1413. Evaporate Cooling Equipment
1413.1 General. {As in IRC}
1413.2 Protection of potable water.
The potable water system must be protected from backflow in accordance with the International Plumbing Code.
Sections 1414 to 1415. {As in IRC}
Chapter 15
Exhaust Systems
[As in IRC]
Chapter 16
Duct Systems
Section 1601. Duct Construction
1601.1 to 1601.3 {As in IRC}
1601.4 Installation {As in IRC}
1601.4.1 to 1601.4.9 {As in IRC}
1601.4.10 Flood hazard areas.
In flood hazard areas, duct systems must be located and installed in accordance with the Floodplain Management Code.
1601.5 to 1601.6 {As in IRC}
Section 1602. Return Air {As in IRC}
Chapter 17
Combustion Air
Section 1701. General
1701.1 Scope. {As in IRC}
1701.2 Opening location.
In flood hazard areas, combustion air openings must be located at or above the elevation required by the Floodplain Management Code.
Chapter 18
Chimneys and Vents
Section 1801. General {As in IRC}
Section 1802. Vent Components
1802.1 Draft hoods.
Draft hoods must be located in the same room or space as the combustion air openings for the appliances.
Exception: Draft hoods of saunas may not be located in the same room as the sauna.
1802.2 Vent dampers. {As in IRC}
1802.3 Draft regulators. {As in IRC}
Sections 1803 to 1805. {As in IRC}
Chapter 19
Special Appliances, Equipment, and Systems
[As in IRC]
Chapter 20
Boilers and Water Heaters
Section 2001. Boilers
2001.1 to 2001.3 {As in IRC}
2001.4 Flood-resistant installation.
In flood hazard areas, boilers, water heaters, and their control systems must be located and installed in accordance with the Floodplain Management Code.
Sections 2002 to 2006. {As in IRC}
Chapter 21
Hydronic Piping
Section 2101. Hydronic Piping Systems Installation
2101.1 General. {As in IRC}
Table 2101.1 {As in IRC, except that polybutylene (PB) pipe and piping is not approved.}
2101.2 to 2101.10 {As in IRC}
Section 2102. Baseboard Convectors {As in IRC}
Section 2103. Floor Heating Systems
2103.1 Piping materials.
Piping for embedment in concrete or gysum materials must be standard-weight steel pipe, copper tubing, cross-linked polyethylene / aluminum / cross-linked polyethylene (PEX-AL-PEX) pressure pipe, chlorinated polyvinyl chloride (CPVC), cross-linked polyethylene (PEX) tubing, or polypropylene (PP) with a minimum rating of 100 psi at 180°F (690 kPa at 82°C).
2103.2 Thermal barrier required. {As in IRC}
2103.3 Piping joints.
Piping joints that are embedded must be installed in accordance with the following requirements:
1. - 2. {As in IRC}
3. {Not Adopted}
4. - 7. {As in IRC}
2103.4 Testing. {As in IRC}
Sections 2104 to 2105. {As in IRC}
Chapter 22
Special Piping and Storage Systems
Section 2201. Oil Tanks
2201.1 Materials. {As in IRC}
2201.2 Above-ground tanks. {As in IRC}
2201.2.1 Tanks within buildings. {As in IRC}
2201.2.2 Outside above-ground tanks. {As in IRC}
Exception: If the 5-feet minimum distance from an adjoining property line cannot be met, the Building Official will determine the location of the tank.
2201.3 to 2201.5 {As in IRC}
2201.6 Flood-resistant installation.
In flood hazard areas, tanks must be installed at or above the elevation required by the Floodplain Management Code or as otherwise allowed by the Floodplain Management Code.
2201.7 Tanks abandoned or removed. {As in IRC}
Sections 2202 to 2204. {As in IRC}
Chapter 23
Solar Thermal Energy Systems
[As in IRC]
Part VI
Fuel Gas
Chapter 24
Fuel Gas
[Not Adopted]
{ See International Fuel Gas Code as modified by Part IV of this Article}
Part VII
Plumbing
{MBPS Modification – The subject matter of Chapters 25 through 33 is not within the scope of the Maryland Building Performance Standards. See the Baltimore City Plumbing Code in Part VI of this Article, and the plumbing code adopted under State Business and Occupation Article, Title 12.}
Chapters 25 to 33
[Not Adopted]
{ See International Plumbing Code, as modified by Part VI of this Article}
Part VIII
Electrical
{MBPS Modification – The subject matter of Chapters 34 through 43 is not within the scope of the Maryland Building Performance Standards. See the Baltimore City Electrical Code in Part III {"Electrical"} of this Article, and the National Electrical Code as adopted and enforced by the State Fire Marshall under State Public Safety Article, Title 12, Subtitle 6.}
Chapter 34
General Requirements
[As in IRC]
Chapter 35
Electrical Definitions
[As in IRC]
Chapter 36
Services
Sections 3601 to 3603. {As in IRC}
Section 3604. Overhead Service and Service-Entrance Conductor Installation
3604.1 Clearances on buildings. {As in IRC}
3604.2 Vertical clearances. {As in IRC}
3604.2.1 Above roofs. {As in IRC}
3604.2.2 Vertical clearance from grade.
{Introductory paragraph as in IRC}
1. - 3. {As in IRC}
4. Clearance above decks.
Conductors must have a vertical clearance of at least 8 feet at the lowest point above the deck surface.
3604.3 to 3604.6 {As in IRC}
Sections 3605 to 3611. {As in IRC}
Chapter 37
Branch Circuit and Feeder Requirements
Section 3701. General {As in IRC}
Section 3702. Branch Circuit Ratings
3702.1 to 3702.11 {As in IRC}
3702.12 Branch circuits serving room air conditioners.
{Introductory paragraph as in IRC}
1. - 4. {As in IRC}
5. The circuit contains a dedicated receptacle for the air conditioner.
3702.12.1 to 3702.12.2 {As in IRC}
3702.13 Electric vehicle branch circuit. {As in IRC}
3702.14 Branch-circuit requirement – Summary. {As in IRC}
3702.14.1 Circuits for fuel-burning equipment.
In fuel-burning equipment such as oil and gas burners and stoves, including auxiliaries such as fans, blowers, and pumps, an individual branch circuit with a disconnecting means on the line side of all equipment and devices, other than the branch-circuit fuses, must be provided. If 2 or more branch circuits are provided for a fuel-burning system, they must be supplied through a common feeder with a disconnecting means that will disconnect all components of the system.
3702.14.2 Controls.
Oil burners other than oil stores with integral tanks must be provided with a device to manually stop the flow of oil to the burners. The device must be placed in a convenient location at a safe distance from the burner with electrically driven equipment. This may be accomplished by an identified switch in the burner supply circuit, placed near the entrance to the room where the burner is located.
3702.14.3 Emergency switch for fuel-burning equipment.
Fuel-burning equipment must have a device to manually stop the flow of fuel at the fuel train to the burner. The device must be placed in a convenient location at a safe distance from the burner and must be identified as a emergency disconnect.
Sections 3703 to 3706. {As in IRC}
Chapter 38
Wiring Methods
[As in IRC]
Chapter 39
Power and Lighting Distribution
Section 3901. Receptacle Outlets
3901.1 to 3901.6 {As in IRC}
3901.7 Outdoor outlets. {As in IRC}
3901.7.1 Near public walkways.
A receptacle installed less than 10 feet from a public walkway must be wall-switch controlled from within the dwelling unit.
3901.7.2 Decks.
At least 1 GFCI receptacle must be installed on all decks of whatever level.
3901.8 to 3901.12 {As in IRC}
Sections 3902 to 3907. {As in IRC}
Section 3908. Grounding
3908.1 to 3908.7 {As in IRC}
3908.8 Types of equipment grounding conductors.
{Introductory paragraph as in IRC}
1. - 8. {As in IRC}
9. Surface metal raceways that are listed for grounding and that contain equipment grounding conductors within the raceway.
3908.8.1 to 3908.8.3 {As in IRC}
3908.9 to 3908.20 {As in IRC}
Section 3909. Flexible Cords {As in IRC}
Chapter 40
Devices and Luminaires
[As in IRC]
Chapter 41
Appliance Installation
Section 4101. General
4101.1 to 4101.4 {As in IRC}
4101.5 Disconnecting means generally. {As in IRC}
4101.5.1 Water Heaters.
Circuits that supply water heaters must have a disconnecting means other than the overcurrent device. This disconnecting means must be installed close to the water heater.
4101.6 to 4101.8 {As in IRC}
Chapter 42
Swimming Pools
[As in IRC]
Chapter 43
Class 2 Remote-Control, Signaling, and Power-Limited Circuits
[As in IRC]
Part IX
Referenced Standards
Chapter 44
Referenced Standards
[As in IRC]
Attachments
Appendices A to D [Informational. Not Adopted]
Appendix E Manufactured Housing Used as Dwellings
Section E101. Scope
101.1 General {As in IRC}
Exception: In addition to these provisions, in flood hazard areas, new and replacement manufactured homes, as defined in City Code Article 7 {"Natural Resources"}, § 1-3 {"Definitions – "Floodproofing" to "Wet floodproofing"}, must meet the applicable requirements of the Floodplain Management Code.