The provisions of the 2018 International Residential Code for One- and Two-Family Dwellings are amended, deleted, or corrected as follows and the following provisions shall supersede the part of the text of the 2018 International Residential Code for One- and Two-Family Dwellings as indicated:
(1) Strike Chapter 1 in its entirety and substitute "Chapter 1 – Construction Code Administrative Provisions".
(2) In section R202, in the definition of "Building Official", strike "The officer or other designated authority charged with the administration and enforcement of this Code", and substitute "Code Official".
(3) In section R202, after the definition of "Closet" insert:
"Code Official. The Director of Inspections and Permits, or duly authorized representative, charged with the administration and enforcement of this Code.";
and, after the definition of "Sweep", insert:
"Swimming Pool. Any structure intended for swimming, recreational bathing, or wading that contains water over 24 inches (610 mm) deep. This includes in-ground, above-ground, and on- ground pools; hot tubs; spas; and fixed-in-place wading pools."
(4) In Table R301.2 (1): Under "Ground snow load", insert "25"; under "Speed (mph)", insert "115"; under "Topographic effects" insert "no"; under "Special wind region", insert "no"; under "Wind-borne debris zone", insert "no"; under "Seismic design category", insert "A"; under "Weathering", insert "Severe"; under "Frost line depth", insert "30 inches"; under "Termite", insert "Moderate - heavy"; after the column headed "Subject to damage from" add a new column with the heading "Decay" and under that heading insert "Slight - moderate"; under "Winter design temp", insert "17 degrees"; under "Ice barrier underlayment required", insert "Yes"; under "Flood hazards", insert "May 2, 1983"; under "Air freezing index", insert ">1500"; under "Mean annual temp", insert "55 degrees"; under "Coincident wet bulb", insert "74%"; under "Winter humidity", insert "30%"; and under "Summer humidity", insert "50%". For Manual J design criteria, under "Latitude", insert "39.20"; under "Winter heating", insert "17"; under "Summer cooling", insert "89"; under "Altitude correct factor", insert "None"; Under "Design Temperature", insert "70F"; under "Design temperature cooling", insert "75F"; under "Heating temperature difference", insert "55F"; and under "Wind velocity cooling" and "Wind velocity heating", in both instances, insert "7.5F".
(5) In section R313.1, after "townhouses", insert "and in existing townhouses where any construction, alteration, enlargement, replacement, or repair constitutes an increase in habitable square footage, which exceeds 50% of the existing habitable square footage, including bathrooms, closets, hallways, storage spaces and utility spaces" and strike the exception in its entirety.
(6) In section R313.1.1, after "NFPA 13D", insert "NFPA 13R, or NFPA 13".
(7) In section R313.2, after "Dwellings" at the end of the first sentence, insert "and in existing one- and two-family dwellings where any construction, alteration, enlargement, replacement, or repair constitutes an increase in habitable square footage, which exceeds 50% of the existing habitable square footage, including bathrooms, closets, hallways, storage spaces and utility spaces. If an existing structure is currently suppressed, any addition, alteration, enlargement, or replacement to the existing structure must be suppressed in accordance with R313.2.1."
(8) In section R322.1.6, in the first sentence, after "R322.2).", insert:
"All electrical panelboards shall be elevated to a minimum of 3 feet above design flood elevation."
(9) In section R322.2.1.1, strike "to or".
(10) In section R322.2.1.2, strike "to or".
(11) In section R322.3.2.1.1.1, strike "to or".
(12) After section R327, insert:
"Section R328
Driveway Aprons and Driveways and Fences
R328.1 Driveway aprons. Driveway aprons shall extend from street or alley pavements to the lot line and shall be constructed in accordance with the provisions of the standard specifications and details issued by the Department of Public Works.
R328.2 Driveways. Driveways shall extend from the lot line to the garage, carport, or parking space, and shall measure at least 9 feet in width. The maximum gradient change at vertical transitions shall be 20%. Vertical transitions shall be designed to prevent the undercarriage or bumper of a standard size car from contacting the driveway surface. Alignment shall be safe and convenient to back a car out, or an adequate turnaround shall be provided. No portion of the driveway shall exceed 14% gradient from the horizontal.
R328.3 Driveway construction. Driveways shall be constructed of concrete, blacktop, or other approved material to prevent spalling, erosion, and cracking.
R328.4 Parking pads. Two off-street parking pads shall be provided for each detached single-family home as defined by section 101.2.1 of the Construction Code. The minimum size per parking space is 9 feet in width and 18 feet in length.
R328.5 Exception. The provisions of this section do not apply to lots one acre or larger.
R328.6 Fences. All fences located on corner lots shall maintain a 25- foot setback from the apex of the intersecting streets."
(13) In section R401.3 strike "The grade shall fall a minimum of 6 inches (152 mm) within the first 10 feet (3048 mm)." and substitute:
"The ground immediately adjacent to the foundation shall be sloped away from the building at a slope of not less than one unit vertical in 12 units horizontal (1:12) for a minimum distance of 5 feet (914 mm) measured perpendicular to the face of the wall or an approved alternate method of diverting water away from the foundation shall be used. Consideration shall be given to the possible additional settlement of the backfill when establishing the final ground level adjacent to the foundation."
(14) In the exception to section R401.3, strike "6 inches (152 mm)" and substitute "5 inches" and strike "10 feet (3048 mm)" and substitute "5 feet".
(15) In section R403.1, after "ACI332." insert "In all buildings a concrete-encased electrode shall be provided prior to the placement of concrete in accordance with section 250.52(a)(3) of the National Electrical Code, 2017 edition.
(16) In section R403.1.4.1 Exceptions: 1., strike "600 square feet (56 m2)" and substitute "400 square feet".
(17) After section R405.1, insert:
"R405.1.1 Subsoil drainage systems. Subsoil drains shall be required for all buildings having basements, cellars, crawl spaces, or floors below grade. Subsoil drains shall be located inside and outside of the foundation and shall be installed at or below the area to be protected. Drains shall discharge by gravity or mechanical means into an approved drainage system in accordance with section R405.1.2. Drains shall be perforated or open joint approved drain tile not less than 3 inches in diameter and be placed in gravel, slag, or crushed rock or other approved material at least one sieve size larger than the tile joint opening or perforations with a minimum of 4 inches surrounding the drain tile or pipe on all sides. Exterior drains shall have an approved filter material placed on top of the required gravel stone or crushed rock.
R405.1.2 Sump pumps and pits. Where subsoil drains do not discharge by gravity, the drains shall discharge to an accessible sump pit with an automatic electric pump. The sump pit shall be a minimum of 18 inches in diameter and 24 inches in depth, and be provided with a fitted cover. The sump pump shall have adequate capacity to discharge all water coming into the sump as it accumulates but in no case shall the capacity of the pump be less than 15 gallons per minute. The discharge from the pump shall be a minimum of 1 1/4 inches and shall have a union in the discharge piping to make the pump accessible for servicing. When not serving a continuous flowing spring or ground water the sump pump may discharge onto a splash block not less than 24 inches in length. The discharge pipe shall be located within 4 inches of the splash block and positioned to divert the flow parallel to the splash block. Subsoil drains and sump pump discharge may discharge to a properly graded open area provided the point of discharge is 5 feet from any property line. Where a continuous flowing spring or groundwater is encountered, subsoil and sump pump discharge lines must be piped to a storm drain or approved water course. When piped to a storm drain all drainage lines shall be provided with an accessible backwater valve.
R405.1.3 Areaway drains. All open subsurface space adjacent to a building serving as an exit or entrance shall be provided with a drain or drains. All areaway drains shall be solid PVC or equivalent and shall discharge directly to a sump crock, daylight, or other approved means. No areaway drain may discharge into a subsoil drain. Drains serving areaways not exceeding 100 square feet shall have a minimum 2-inch diameter pipe. Areaway drains exceeding 100 square feet but not exceeding 1,000 square feet shall be provided with a minimum 3-inch diameter pipe. Areaway drains exceeding 1,000 square feet shall be sized in accordance with the 2018 International Plumbing Code.
R405.1.5 Foundation weep holes. Where subsoil drains are required by section R405.1.1, foundations of hollow core masonry shall have foundation weep holes. Weep holes shall be placed a maximum of 4 foot O/C intervals and shall discharge into the aggregate of the interior subsoil drainage system."
(18) In section R405.1.1, strike "R405.1.1" and substitute "R405.1.6" and strike "either" and, after "interior", strike "or" and substitute "and".
(19) In section R406.1 after "enclose", insert "non-habitable and non-usable".
(20) In section R406.2, strike "In areas where a high water table or other severe soil-water conditions are known to exist," and capitalize "exterior".
(21) In section R801.3, strike "In areas where expansive soils or collapsible soils are known to exist,"'; and, after the last sentence, insert "The roof drainage system shall discharge within four (4) inches of a splash block. The discharge may be to a property graded open area provided that the point of discharge is at least five (5) feet from any property line or, as required by an approved grading and stormwater management plan, to a swale or device.".
(22) In section M1305.1.2, in the last sentence, after "appliance.", insert:
"Access to the attic opening shall be provided by a permanent or pull down stairway in all new construction."
(23) In section M1307.5, strike "Chapters 14, 15, 19, 20, and 34 through 43 of this Code" and substitute "the National Electrical Code, 2017 edition".
(24) After section M1307.5 insert:
"M1307.5.1 Final disconnect means for central heating and air conditioning systems. Central heating or central air conditioning systems shall be wired through a final disconnect means. The final disconnect means shall be located at the equipment being installed."
(25) In section P2603.5, strike "not less than 12 inches (305 mm) deep and not less than".
(26) In section P2603.5.1, in the third line, strike "[number] inches (mm)" and substitute "12 inches" and, in the fifth line, strike "[number] inches (mm)" and substitute "18 inches".
(27) After section P2604.4, insert:
"P2604.5 Tracer wire. Nonmetallic sanitary sewer and nonmetallic water supply piping that connects to public systems shall be locatable. An insulated copper tracer wire, 10 AWG minimum in size and suitable for direct burial or an equivalent product shall be utilized. The wire shall be installed in the same trench as the sewer or water supply piping within 12 inches
(305 mm) of the piping and shall be installed from within five feet of the building wall to the point where the building sewer or water supply system connects with the public system. At a minimum, one end of the wire shall terminate above grade in an accessible location that is resistant to physical damage, such as with a cleanout or at the building wall."
(28) In P2903.4, after "P2903.4.2.", insert:
"Thermal expansion shall be provided for all closed potable water systems."
(29) After section "P2903.4.2" insert:
"P2903.4.3 Non-pressurized expansion tanks. Non-pressurized expansion tanks shall be securely fastened to the structure and supported to carry twice the weight of the tank filled with water. Provisions shall be made for draining non-pressurized tanks without emptying the system.
P2903.4.4 Pressurized expansion tanks. Pressurized expansion tanks shall be consistent with the volume and capacity of the system. Tanks shall be capable of withstanding a hydrostatic test pressure of two and one-half times the allowable working pressure of the system.
P2903.4.5 Minimum capacity. The minimum capacity of expansion tanks shall be determined from the manufacturer's specifications."
(30) After section P2906.5, insert:
"Underground water service piping for public water systems shall be Type L copper. Private water service piping shall be Type K underground and Type L for above ground installations."
(31) After section P2906.5, insert:
"P2906.5.1 Water distribution piping. Inaccessible water distribution piping under slabs shall be copper water tube minimum Type L for public water systems and Type K for private water systems, brass, ductile iron pressure pipe, cross-linked polyethylene/aluminum/cross-linked polyethylene (PEX-AL-PEX) pressure pipe, chlorinated polyvinyl chloride (CPVC) or polybutylene (PB) or cross-linked polyethylene (PEX) plastic pipe or tubing, all to be installed with approved fittings or bends. The minimum pressure rating for plastic pipe or tubing installed under slabs shall be 100 psi at 180 F (689k Pa at 82 C)."
(32) After section P3007.1, insert:
"P3007.1.1 Dwellings. Dwellings served entirely by pumping systems shall use simplex pumping equipment with an integral alarm system."
(33) Strike Chapters 34 through 43 in their entirety.
(34) Appendix I Chapter 44 under ICC Strike "International Private Sewage Disposal Code" and substitute "Anne Arundel Private Sewage Code and Well Code".
(35) In section AI101.1, strike "International Private Sewage Disposal Code" and substitute "the Anne Arundel County Private Sewage Disposal and Well Code".
(Bill No. 1-12; Bill No. 10-13; Bill No. 123-15; Bill No. 60-20)