ORDINANCE 2013-02  AN ORDINANCE OF THE CITY OF TOLAR, TEXAS, ADOPTING THE 2012 INTERNATIONAL RESIDENTIAL CODE THAT IS WRITTEN BY THE INTERNATIONAL CODE COUNCIL, AS THE STANDARD BY WHICH ALL CONSTRUCTION OR INSTALLATION PERFORMED WITHIN THE CITY LIMITS IS. JUDGED; AND ADOPTING THE NCTCOG (NORTH CENTRAL TEXAS COUNCIL OF GOVERNMENTS) RECOMMENDED AMENDEMENTS TO THE 2012 INTERNATIONAL RESIDENTIAL CODE AND REPEALING ALL ORDINANCES AND PARTS OF THE ORDINANCES IN CONFLICT WHEREAS, the City of Tolar has a responsibility to maintain the highest standards of quality and safety in all areas of constructions and manufacture; and WHEREAS, the International Code Council, has established regulations and requirements which have been approved and accepted as a standard by which  THEREWITH.  municipalities may measure performance and installation;  NOW, THEREFORE, BE IT ORDAINED BY THE CITY COUNCIL OF THE The 2012 Version of the International Residential Code and the recommended amendments by the NCTCOG (North Central Texas Council of Governments) thereto is hereby adopted and referred to as the Official Residential Code of the City of Tolar, and iti is made a part of Chapter 3 - Building Regulations of the Code of Ordinances of the  CITY OF TOLAR, TEXAS:  City of Tolar.  A copy of this 2012 International Residential Code and the NCTCOG recommended amendments shall be placed on file in the office of the City of Tolar. Should the City Council desire to make any modifications to the 2012 International Residential Code, they shall adopt the amendments thereto by ordinance. This ordinance shall be in full force and effective from and after its passage, and PASSED AND APPROVED THIS 19th DAY OF AUGUST: 2013A  itisso ordained.  ATTEST: /  : j 6)  2  -  C6 dhnson, City Secretary  TEXAS    Recommended Amendments to the 2012 International Residential Code North Central Texas Council of Governments region  The following sections, paragraphs, and sentences of the 2012 International Residential Code are hereby amended as follows: Standard type is text from the IRC. Underlined type is text inserted. Lined through vpeisdeaadeatiomiRc. A double asterisk at the beginning of a section identifies an amendment carried over from the 2009 edition of the code and a triple asterisk identifies a new or revised amendment Note: Historically NCTCOG has limited Chapter 1 amendments in order to allow each city to insert their local policies and procedures. We now have suggested certain items to be brought to the attention of cities considering adoption of the code that may be of concern to several jurisdictions. It is still intended to be discretionary to each city to determine which Chapter 1 amendments to include. The energy provisions in Chapter 11 of the International Residential Code (IRC) now mirror the requirements oft the International Energy Conservation Code (IECC). As such, there is no difference between Chapter 11 of the 2012 IRC and the 2012 IECC. Reference the 2012 IECC for NCTCOG  with the 2012 code.  recommended amendments to that code. **Section R102.4; change to read as follows:  R102.4 Referenced codes and standards. The codes, when specifically adopted, and standards referenced in this code shall be considered part of the requirements of this code to the prescribed extent ofe each such reference and as further regulated in Sections R102.4.1 and R102.4.2. Whenever amendments have been adopted to the referenced codes and standards, each reference to said code and standard shall be considered to reference the amendments as well. Any reference made to NFPA70 (Reason: Legal wording to recognize locally adopted codes and amendments adopted with referenced codes. Note: the former ICC Electrical Code is now Appendix K of the IBC, but no longer called by that name. Ifadopting in that location, be sure to include language that includes structures under IRC and  orthe Electrical Code shall mean the Electrical Code as adopted.  IBC.)  **Section R110 (R110.1 through R110.5); delete the section. (Reason: Issuing CO's for residences is not a common practice in the area.) **Section R112.2.1 & R112.2.2; delete the sections. (Reason: Floodplain provisions are addressed locally.)  **Section R202; change definition of Townhouse" to read as follows:  TOWNHOUSE. A single-family dwelling unit constructed in a group of three or more attached units separated by property lines in which each unit extends from foundation to roof and with a yard or public  way on at least two sides.  (Reason: Consistent with terminology commonly used in this region.)  North Central Texas Council of Governments  1  March 2013  2012 IDP Amandmante    ***Table R301.2(1); fill in as follows:  GROUND SNOW LOAD 5lb/ft2  WIND DESIGN  SEISMIC DESIGN CATEGORY A  SPEEDd (mph) 90(3-sec-gust/76 fastest mile  Topographic Effectsk No  SUBJECT TO DAMAGE FROM Frost line deptho 6"  Weathering* moderate TEMPe 22°F  Termitec veryheavy  WINTER DESIGN ICE BARRIER UNDER-  FLOOD local code  AIR FREEZING MEAN ANNUAL  LAYMENT REQUIREDh HAZARDS9  INDEX 150  TEMPI 64.9°F  No  (No change to footnotes) (Reason: To promote regional uniformity.)  **Section R302.1; add exception #6 to read as follows: Exceptions: fprevious exceptions unchanged)  6. Open non-combustible carport structures may be constructed when also approved within  adopted ordinances.  (Reason: Refers to other ordinances, such as zoning ordinances.) ***Section R302.2, Exception; change to read as follows:  Exception: A common two-hour fre-resistance-rated wall assembly, or one-hour fire-resistance-rated  wall assembly.when equipped with a sprinkler system... fremainder unchanged)  (Reason: Consistent with regional practice.)  ***Section R302.2.4, Exception 5; change to read as follows: Exception: (previous exceptions unchanged)  5.Townhouses separated by a common 1-hour re-resistance-rated wall as provided in Section  R302.2.  (Reason: Consistent with regional practice.) **Section R302.3; add Exception #3 to read as follows:  Exceptions:  1. (existing text unchanged) 2. (existing text unchanged)  3. Two-family dwelling units that are also divided by a property line through the structure shall  be separated as required for townhouses.  North Central Texas Council of Governments  2  March 2013  201 IDP Amandmante    (Reason: Provide guidance fora a common construction method in this area. Correlates with amendment  to IRC Section R202 Townhouse definition.) *** Section R302.5.1; change to read as follows:  R302.5.1 Opening protection. Openings from a private garage directly into a room used for sleeping purposes shall not be permitted. Other openings between the garage and residence shall be equipped with solid wood doors not less than 13/8 inches (35 mm) in thickness, solid or honeycomb core steel doors not less than 13/8 inches (35 mm) thick, or 20-minute fire-rated doors qupped-wiasaldeng (Reason: Consistent with common local practice. Absence of data linking self-closing devices to  device.  increased safety. Self-closing devices often fail to close the door entirely.) ***Section R303.3, Exception; amend to read as follows:  Exception: The glazed areas fremainder unchanged) unless the space contains only a water closet, a lavatory, or water closet and al lavatory may be ventilated with an approved mechanical recirculating  fan or similar device designed to remove odors from the air. (Reason: Consistent with common local practice.) ***R303.4 Mechanical Ventilation; change to read as follows:  Where the air infiltration rate of a dwelling unit is lessthan 5 air changes per hour orless when tested with a blower door at a pressure of 0.2 inch W.C. (50 Pa) in accordance with Section N1102.4.1.2, the dwelling unit shall be provided with whole-house mechanical ventilation in accordance with Section (Reason:See IECC change to performance testing. Whole-house ventilation is recognized as necessary). Where required in existing dwellings. Where work requiring a permit for an addition or an alteration that occurs in existing dwellings, that have attached garages or in existing dwellings within which fuel- fired appliances exist, carbon monoxide alarms shall be provided in accordance with Section R315.1:  M1507.3.  ***Section R315.3, amend and add exceptions as follows:  Exceptions:  1.Work involving the exterior surfaces of dwellings, such as the replacement of roofing or siding, or the addition or replacement of windows or doors, or the addition of a porch or 2. Installation, alteration or repairs of plumbing or mechanical systems are exempt from  deck, are exempt from the requirements of this section.  the requirements of this section.  (Reason: Consistent with exceptions in Section R314.3.1)  ***Section R401.2, amended by adding a new paragraph following the existing paragraph to read Every foundation and/or footing, or any size addition to an existing post-tension foundation, regulated by  as follows.  Section R401.2. Requirements. fexisting text unchanged) this code shall be designed and sealed by a Texas-registered engineer.  (Reason: reflects regional practice.) **Section 602.6.1; amend the following:  R602.6.1 Drilling and notching of top plate. When piping or ductwork is placed in or partly in an exterior wall or interior load-bearing wall, necessitating cutting, drilling or notching of the top plate by more  North Central Texas Council of Governments  3  March 2013  201 IDP Amondmante    than 50 percent of its width, a galvanized metal tie not less than 0.054 inch thick (1.37 mm) (16 Ga) and 4 inches-(38)mm, 5inches (127mm) wide shall bet fastened across and to the plate at each side oft the opening with not less than eight 10d (0.148 inch diameter) having a minimum length of 1 % inches (38 mm) at each side or equivalent. Fasteners will be offset to prevent splitting of the top plate material. The metal tie must extend a minimum of 6 inches past the opening. See figure R602.6.1. (remainder (Reason: reflects regional practice and to comply with P2603.2.1. Also provides additional assurance of  unchanged)  maintaining the integrity of the framing by spreading the nailing pattern.) **Figure R602.6.1; delete the figure and insert the following figure:  EXTERIOR OR BEARING WALL-  NOTCH GREATER THAN 50 PERCENT OF THE PLATE WIDTH-  16 GAGE (054 IN.JAND5 5IN. WIDE METAL TIE FASTENED, ACROSS, AND TO THE PLATE AT EACH SIDE OF THE NOTCH WITH8-10d NAILS EACHSIDE  TOP PLATES-  PIPE  (Reason: reflects regional practice and to comply with P2603.2.1.. Also provides additional assurance of  maintaining the integrity of the framing by spreading the nailing pattern.) **Section R703.7.4.1; add a second paragraph to read as follows: In stud framed exterior walls. allt ties shall be anchored to studs as follows:  1. When studs are 16in(407 mm)o O.C., stud ties shall be spaced no further apart than 24 in (737 mm) vertically starting approximately 12 in (381r mm) from the foundation:or  North Central Texas Council of Governments  4  March 2013  2012 IDP Amondmante    2. When studs are 24 in (610 mm) O.C., stud ties shall be spaced no further apart than 16i in(483 (Reason: Provide easy toi install and inspect dimensions to clarify how to anchor and to distinguish  mm) vertically starting approximately 8i in (254 mm) from the foundation.  "studs" from other types of construction.)  **Section R902.1; Amend and add exception #3 to read as follows:  R902.1 Roofing covering materials. Roofs shall be covered with materials as set forth in Sections R904 and R905. Class A, B,or Cr roofing shall bei installed n-areas-desigmatedbylaw-aS-requHgtheiruse-OF  when.the-edgeoHne.eAHEREEH3-eetemaloline. fremainder unchanged)  Exceptions:  1. ftext unchanged) 2. ftext unchanged) 3. ftext unchanged)  4.Non-classified roof coverings shall be permitted on one-story detached accessory: structures used as tool and storage sheds, playhouses and similar uses, provided the floor area does  not exceed (area defined byj jurisdiction).  (Reason: Consistent with regional practice. Language fits better in this section. Aligned. the area and  description of the building to be consistent with the item #1 to Section R105.2) Part IV- Energy Conservation- Chapter 11 [RE) *** insert text to read as follows:  Residential Provisions for Energy Efficiency  (Reason: To remain consistent with IECC residential provisions.) ***Section M1305.1.3; change to read as follows:  M1305.1.3 Appliances in attics. Attics containing appliances requiring access shall be provided. (bulk of paragraph unchanged) sides of the appliance where access is required. The clear access opening dimensions shall be a minimum of 20 inches by 30 inches (508 mm by 762 mm), orl larger and large enough to allow removal of the largest appliance. Aw walkway to an appliance shall be rateda asa floor as approved by the building official. As a minimum, for access to the attic space, provide one oft the  following:  1. Apermanent stair.  2. Apull down stair with a minimum 300 lb (136 kg) capacity. 3. An access door from an upper floor level.  AcpssPane-may-besstniseen-2-and3-lpDelnecdedfiealdve  lebuicing.cendiiens Exceptions:  1. The passageway and level service space are not required where the appliance can be 2. Where the passageway is unobstructed.. -fremaining text unchangedy  serviced and removed through the required opening.  North Central Texas Council of Governments  5  March 2013  2012 IDP Amandmante    (Reason: To provide a safe means of accessibility to appliances in attics and to allow for different types ofconstruction limitations. Consistent with regional amendment to IFGC and IMC306.3.)  **Section M1411.3; change to read as follows: direct or indirect drain. fremaining text unchanged)  M1411.3 Condensate disposal. Condensate from all cooling coils or evaporators shall be conveyed from the drain pan outlet to napoadpasedldepet a sanitary sewer through at trap, by means ofa (Reason: Reflects regional, practice and to reduce excessive runoffi into storm drains.)  **Section M1411.3.1, Items 3 and 4; add text to read as follows:  M1411.3.1 Auxiliary and secondary drain systems. (bulk of paragraph unchanged)  1. ftext unchanged) 2. ftext unchanged)  3. An auxiliary drain pan... fbulk of text unchanged). with Item 1 of this section. Al water level detection device may be installed only with prior approval of the building official. 4. Av water level detection device... fbulk oft text unchanged). overflow rim of such pan. A water level detection device may be installed only with prior approval of the building official.  (Reason: Reflects standard practice in this area.) **Section M1411.3.1.1; add text to read as follows:  M1411.3.1.1 Water-level monitoring devices. On down-flow units . (bulk of text unchanged). : installed int the drain line. A water level detection device may be installed only with prior approval of the building  official.  (Reason: Reflects standard practice in this area.)  ***M1503.4 Makeup Air Required Amend and add exception as follows:  M1503.4 Makeup air required. Exhaust hood systems capable of exhausting in excess of 400 cubic feet per minute (0.19 m3/s) shall be provided with makeup air at a rate approximately equal to the difference between the exhaust air rate and 400 cubic feet per minute. Such makeup air systems shall be equipped with a means of closure and shall be automatically controlled to start and operate simultaneously with the Exception: Where all appliances in the house are of sealed combustion, pcwer-vent, unvented, ore electric, the exhaust hood system shall be permitted to exhaust up to 600 cubic feet per minute (0.28 m3/s) without providing makeup air. Exhaust hood systems capable of exhausting in excess of600 cubic feet per minute (0.28 m3/s)s shall be provided with ar makeup air at arate approximately equal to the difference between the exhaust air rate and 600 cubic feet per minute. Exception requires makeup air equaling the amount above and beyond 400 cfm for larger fan which will address concerns related to "fresh" air from the outdoors in hot humid climates creating a burden on HVAC equipment and negative efficiency impacts from backdrafting and wasted energy.  exhaust system.  (Reason:  North Central Texas Council of Governments  6  March 2013  2012 IDP Amandmante    **Section M2005.2; change to read as follows:  M2005.2 Prohibited locations. Fuel-fired water heaters shall not bei installed in a room used as a storage closet. Water heaters located in a bedroom or bathroom shall be installed in a sealed enclosure so that combustion airv will not be taken from the living space. Access to such enclosure may be from the bedroom or bathroom when through a solid door, weather-stripped in accordance with the exterior door air leakage requirements oft the International Energy Conservation Code and equipped with an approved self-closing device. Installation of direct-vent water heaters within an enclosure is not required. (Reason: Corresponds with the provisions of IFGC Section 303, exception #5.)  **Section G2408.3 (305.5); delete.  Reason: This provision does not reflect standard practice in this area.) **Section G2415.2.1 (404.2.1); add a second paragraph to read as follows:  Both ends of each section of medium pressure gas piping shall identify its operating gas pressure with an approved tag. The tags are to be composed of aluminum or stainless steel and the following wording  shall be stamped into the tag: "WARNING 1/2 to 5 psi gas pressure Do Not Remove"  (Reason: To protect homeowners and plumbers.)  **Section G2415.2.2 (404.2.2); add an exception to read as follows:  Exception: Corrugated stainless steel tubing (CSST) shall be a minimum of 1/2" (18 EDH).  (Reason: Pipe less than 1/2" has a history in this region of causing whistling.)  **Section G2415.12 (404.12); change to read as follows:  G2415.12 (404.12) Minimum burial depth. Underground piping systems shall be installed a minimum depth of 42inches/305.mm), 18 inches (457 mm) below grade, except as provided fori in Section  G2415.12.1.  (Reason: To provide increased, protection to piping systems.) ***Section G2415.12.1 (404.12.1); change to read as follows:  G2415.12.1) Individual outside appliances. Individual lines to outside lights, grills or other appliances shall be installed a minimum of 8-12 inches (203 mm) below finished grade... Rest unchanged.  (Reason: To provide increased, protection to piping systems.)  North Central Texas Council of Governments  7  March 2013  2012 IDP Amandmante    **Section G2417.1 (406.1); change to read as follows:  G2417.1 (406.1) General. Prior to acceptance and initial operation, all piping installations shall be inspected and pressure tested to determine that the materials, design, fabrication, and installation practices comply with the requirements of this code. The permit holder shall make the applicable tests prescribed in Sections 2417.1.1 through 2417.1.5 to determine compliancer with the provisions of this code. The permit holder shall give reasonable advance notice to the building official when the piping system is ready for testing. The equipment. material, power and labor necessary for the inspections and test shall be furnished by the permit holder and the permit holder shall be responsible for determining that (Reason: To utilize language used in the IPC regarding who is responsible for testing procedures.)  the work will withstand the test pressure prescribed in the following tests.  **Section G2417.4; change to read as follows:  G2417.4 (406.4) Test pressure measurement. Test pressure shall be measured with a manometer or with a pressure-measurng device designed and calibrated to read, record, or indicate a pressure loss caused by leakage during the pressure test period. The source of pressure shall be isolated before the pressure tests are made. Mechanicalg gauges Gauges used to measure... fremainder unchanged) (Reason: Ton require the use of more accurate diaphragmgauges. Spring gauges do not provide  accurate measurement below approximately 17 psig.) **Section G2417.4.1; change to read as follows:  G2417.4.1 (406.4.1)Test pressure. The test pressure to be used shall be notl less than oneandone- halftimes meproposes-mawmumURPRngPresue: Dutnotless-than 3 psig (20 kPa gauge), oratt the discretion of the Building Official. the piping and valves may be tested at apressure of atleast six (6) inches (152 mm) of mercury, measured with amanometer or slope gauge. respectve-afdesiga pressure. WPeretneies-pessure: excAd:125p894082HPAge9PePareshalndie.cead avalvetnatpreducea-ooPpstressintmepprggeaterinansopercento/mespecied-mium-yeNd strengthof the pipe. For tests requiring a pressure of 3 psig.mechanical gauges used-to-measure test pressures shall utilize a dial with a minimum diaphragm diameter oft three and one half inches (3 %).a set hand, 1/10 pound incrementation and pressure range not to exceed 6 psi for tests requiringa pressure of 3 psig. For tests requiring a pressure of 10 psig, megnanca-daphragm gauges shall utilize a dial with ar minimum diameter of three and one-half inches (3 %"), a set hand, a minimum of 2/10 pound incrementation and a pressure range not to exceed 20 psi. Mavearangesuchinatnengnetemso-ne For welded. piping, and for piping carrying gas at pressures in excess of fourteen (14) inches water column pressure (3.48 kPa) (1/2 psi) and less than 200 inches of water column pressure (52.2 kPa)_(7.5 psi), the test pressure shall not be less than ten (10) pounds per square inch (69.6 kPa). For piping carrying gas at a pressure that exceeds 200 inches ofy water column (52.2 KPa)(7.5ps).1 the test pressure shall be not less than one and one-half times the proposed maximum working pressure. (Reason: To provide for lesser pressures to coordinate with the use of more accurate diaphragm gauges.)  aelsmotysae-hanive times the test pressure.  **Section G2417.4.2; change to read as follows:  G2417.4.2 (406.4.2) Test duration. Thei test duration shall be held for a length of time satisfactory to the Building Official, but in no case for be-not less than 40-fifteen (15) minutes. For welded piping, and for piping carrying gas at pressures ine excess of fourteen (14) inches water column pressure (3.48k kPa). the  North Central Texas Council of Governments  8  March 2013  201 IDP Amandmante    test duration shall be held for al length of time satisfactory to the Building Official, but in no case for less  than thirty (30)minutes.  (Reason: To comply with accepted regional practices.)  **Section G2420.1 (406.1); add Section G2420.1.41 to read as follows:  G2420.1.4 Valves in CSST installations. Shutoff valves installed with corrugated stainless steel (CSST)piping systems shall be supported with an approved termination fitting, or equivalent support. suitable for the size oft the valves, of adequate strength and quality, and located at intervals so asto prevent or damp out excessive vibration buti in no case greater than 12-inches from the center oft the valve. Supports shall be installed sO as not to interfere with the free expansion and contraction oft the system's piping, fittings, and valves between anchors. All valves and supports shall be designed and (Reason: To provide proper security to CSST valves. These standards were established in this region in  installed so they will not be disengaged by movement of the supporting piping.  1999 when CSST was an emerging technology.)  ***Section G2420.5.1 (409.5.1); add text to read as follows:  G2420.5.1 (409.5.1) Located within the same room. The shutoff valve. fbulk of paragraph unchanged). in accordance with the appliance manufacturer's instructions. A secondary shutoff valve must be installed within 31 feet (914 mm) oft the firebox if appliance shutoff is located in the firebox. (Reason: Reflects regional practice and provides an additional measure of safety.) **Section G2421.1 (410.1); add text and Exception to read as follows:  G2421.1 (410.1) Pressure regulators. Al line pressure regulator shall be : fbulk of paragraph unchanged). approved for outdoor installation. Access to regulators shall comply with the requirements Exception: A passageway or level service space is not required when the regulatori is capable of  for access to appliances as specified in Section M1305.  being serviced and removed through the required attic opening. (Reason: To require adequate access to regulators.)  **Section G2422.1.2.3 (411.1.3.3); delete Exception 1 and Exception 4.  (Reason: To comply with accepted regional practices.)  **Section G2445.2 (621.2); add Exception to read as follows:  G2445.2 (621.2) Prohibited use. One or more unvented. room heaters shall not be used as the sole Exception: Existing approved unvented room heaters may continue to be used in dwelling units, in accordance with the code provisions in effect when installed, when approved byt the Building Official unless an unsafe condition is determined to exist as described in International Fuel Gas Code Section  source of comfort heating in a dwelling unit.  108.7 of the Fuel Gas Code. North Central Texas Council of Governments 2017 IDP Amandmonte  9  March 2013    (Reason: Gives code official discretion  **Section G2448.1.1 (624.1.1); change to read as follows:  G2448.1.1 (624.1.1) Installation requirements. The requirements for water heaters relative to access, sizing, relief valves, drain pans and scald protection shall be in accordance with this code. (Reason: To clarify installation requirements. Also corresponds with amendments regarding water heater  access.)  **Section P2801.6; add Exception to read as follows:  Exceptions:  1. Electric Water Heater.  (Reason: To coordinate with Section 2408.2 of the IRC, which recognizes this exception.)  **Section P2902.5.3; change to read as follows:  P2902.5.3 Lawn irrigation systems. The potable water supply to lawn irrigation systems shall be protected against backflow by an atmospheric-type vacuum breaker, a pressure-type vacuum breaker,a double-check assembly or a reduced pressure principle backflow preventer. A valve shall not bei installed downstream from an atmospheric vacuum breaker. Where chemicals are introduced into the system, the potable water supply shall be protected against backflow by a reduced pressure principle backflow  preventer.  (Reason: To provide clarity.)  **Section P3005.2.6; change to read as follows:  P3005.2.6 Base of-stacks Upper Terminal. Acleanoutshall be Prowidedattne-basedieach.wasieor soilstack- Each horizontal drain shall be provided with a cleanout ati its upper terminal. Exception: Cleanouts may be omitted on a horizontal drain less than five (5) feet (1524 mm)i in  length unless such line is serving sinks or urinals. (Reason: To eliminate the requirement for excessive cleanouts.)  **Section P3111; delete.  (Reason: A combination waste and vent system is not approved for use in residential construction.)  **Section P3112.2; delete andi replace with the following:  P3112.2 Installation. Traps for island sinks and similar equipment shall be roughed in above the floor and may be vented by extending the vent as high as possible, but not less than the drainboard height and  North Central Texas Council of Governments  10  March 2013  201 IDP Amondmante    then returning it downward and connecting it to the horizontal sink drain immediately downstream from the vertical fixture drain. The return vent shall be connected to the horizontal drain throughay wye-branch fitting and shall, in addition, be provided with at foot vent taken off the vertical fixture vent by means ofa wye-branch immediately below the floor and extending tot the nearest partition and then through the roof tot the open air or may be connected to other vents at a point not less than six (6) inches (152 mm) above the flood level rim of the fixtures served. Drainage fittings shall be used on all parts of the vent below the floor level and a minimum slope of one-quarter (1/4)inch per foot (20.9 mm/m) back to the drain shall be maintained. The return bend used under the drainboard shall be aone (1)piece fitting or an assembly of at forty-five (45) degree (0.79 radius). a ninety (90) degree (1.6 radius) and a forty-five (45) degree (0.79 radius) elbow in the order named.. Pipe sizing shall be as elsewhere required in this Code. The island sink drain, upstream oft the return vent. shall serve no other fixtures. An accessible cleanout shall be (Reason: To clarify the installation of island venting and to provide a regioral guideline on a standard  installed in the vertical portion oft the foot vent. installation method for this region.)  END  North Central Texas Council of Governments  11  March 2013  2012 IDP Amondmante