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HomeMy WebLinkAboutOrd 155 Adopting the 1985 Uniform Building CodeORDINANCE NO. 155 AN ORDINANCE OF THE TOWN OF WESTLAKE, TEXAS, REPEALING ORDINANCE NO. 66 WHICH ADOPTED THE NATIONAL ELECTRICAL CODE, 1973 AND ADOPTING BY THIS ORDINANCE THE NATIONAL ELECTRICAL CODE, 1984 IN ITS ENTIRETY WITHOUT AMENDMENTS; REPEALING ORDINANCE NO. 67 WHICH ADOPTED THE 1973 PLUMBING ORDINANCE AND ADOPTING BY THIS ORDINANCE THE UNIFORM PLUMBING CODE, 1985, IN ITS ENTIRETY, WITHOUT AMENDMENTS; REPEALING ORDINANCE NO. 68 WHICH ADOPTED THE UNIFORM BUILDING CODE, 1973, AND ADOPTING BY THIS ORDINANCE THE UNIFORM BUILDING CODE, 1985 IN ITS ENTIRETY, BUT WITH AMENDMENTS TO CERTAIN SECTIONS OF THE CODE AS DESCRIBED HEREIN; ADOPTING THE UNIFORM MECHANICAL CODE, 1985 IN ITS ENTIRETY, WITHOUT AMENDMENTS; ADOPTING THE UNIFORM FIRE CODE, 1985, IN ITS ENTIRETY, BUT 'WITH AMENDMENTS TO CERTAIN SECTIONS OF THE CODE AS DESCRIBED HEREIN; PROVIDING A SEVERABILITY CLAUSE; PROVIDING A PENAL CLAUSE, AND MAKING AN EFFECTIVE DATE. THE BOARD OF ALDERMAN OF THE TOWN OF WESTLAKE, TEXAS, HEREBY ORDAINS: Section 1. That Ordinance No. 66 which adopted the National Electrical Code, 1973, is hereby repealed and by this Ordinance the National Electrical Code, 1984, is hereby adopted in its entirety, without amendments. SPrti nn 2 - That_ That Ordinance No. 67 which adopted the 1973 Plumbing Ordinance is hereby repealed and the Uniform Plumbing Code, 1985, is hereby adopted in its entirety, without amendments. Sartinn 3_ That Ordinance No. 68 which adopted the Uniform Building Code, 1973, is hereby repealed and the Uniform Building Code, 1985, is hereby adopted in its entirety, but with the amendments to certain sections as set forth in Exhibit "A" attached hereto and made a part hereof. Section 4. That the Uniform Mechanical Code, 1985, is hereby adopted in its entirety, without amendments Sectinn 5_ That the Uniform Fire Code, 1985, is hereby adopted in its entirety, but with the amendments to certain sections as set forth in Exhibit "B" attached hereto and made a part hereof. Section 6. That all necessary notices have been issued and all requisite public hearings have been held in which every person desiring to do so had the free and fair opportunity to be heard. Sr-�rtinn 7_ That no person, firm or corporation or other entity shall perform any work or supply any materials falling within the jurisdiction of one of the respective codes adopted herein without first having secured a permit in accordance with the applicable code. Section 8. It is hereby declared to be the intention of the Town Council that the sections, paragraphs, sentences, clauses and phrases of the Ordinance are severable, and if any phrase, clause, sentence, paragraph or section of this Ordinance shall be declared void, ineffective or unconstitutional by the valid judgment or decree of any court of competent jurisdiction, such voidness, ineffectiveness or unconstitutionality shall not effect any of the remaining phrases, clauses, paragraphs or sentences of this Ordinance, since the same would have been enacted by the Town Council without the incorporation hereof of any such void, ineffective or unconstitutional phrase, clause, sentence, paragraph or section. Section 9 That any person, either by himself or agent, and any firm, corporation or other entity who violates any of the provisions of the codes adopted herein shall be deemed guilty of a misdemeanor and, upon conviction of any such violation, shall be fined in any sum not to exceed Two Hundred Dollars ($200.00); and each day during which such violation continues shall constitute a separate and distinct offense. In any case of a violation of any of the terms or provisions of the codes adopted by this Ordinance, by any corporation, the officers and agents actively in charge of the business of such corporation shall be subject to the penalty herein provided. Any offense defined within the codes adopted herein which has been defined by laws of the State of Texas as an offense and for which penalty has been prescribed shall be punished as provided in said state law, and nothing herein shall be held as fixing any penalty contrary to the penalty provided by the laws of the State of Texas. Section 10. That this Ordinance shall become effective and be in full force and effect from and after the date of its passage and publications, as required by law, and it is so ordained. -2- PASSED AND APPROVED THIS Ll,. DAY OF AUGUST, 1986. ATTEST: Gerfy White, Town Secretary To n of Westlake, Texas APPROVED AS TO LEGAL FORM: Paul -C. Isham, Town Attorney Town of Westlake; Texas ale L. W te, Mayor w Town of Westlake, Texas -3- EXHIBIT "An AMENDMENTS TO THE UNIFORM BUILDING CODE, 1965 FIRE -RESISTIVE SUBSTITUTION Section 508. In buildings provided throughout with an approved automatic sprinkler e_s specified in Subchapter 38, the automatic sprinkler system may be substituted for fire resistive provisions of the code as specified below. 1. The fire resistive requirements for occupancy separations set forth in Table No. 5-B may be reduced by one hour, except when separating a Group B. Division 1 occupancy or a Group H occupancy. 2. The fire resistance of exterior walls and opening protection, as required by Section 504 (b) may be reduced as follows: Four-hour required exterior wall protection may be reduced to two-hour protection. Two-hour exterior wall protection may be reduced to one-hour wall protection. One-hour required wall protection shall not be reduced; however, openings permitted in such wails shall not require protection. 3. When separating other than a Group H occupancy four-hour fire resistive area separation walls specified in Section 505(e) may be reduced to two-hour fire -resistive construction and shall, at the minimum, be subject to the provisions for two hour area separation walls. This reduction shall also apply for area separation walls as required by Section 1701. 4. The requirements for corridor construction and corridor openings may be reduced as specified in Sections 3305(g) and 3305(h). 5. Where one-hour fire -resistive construction throughout is required by this code, an approved automatic sprinkler system throughout may be substituted, provided the height and area do not exceed the maximum allowable unsprinklered height and area. EXCEPTION: The provision of an approved automatic sprinkler system shall not waive or reduce required fire resistive construction for: a. Shaft enclosures (Section 1706). b. Stair enclosures (Section 3309). c. Exit passageways (Section 3312(x)). d. Structural member supporting shaft enclosures or exit passageways. OPEN PARKING GARAGES Section 709(1) Sprinkler Systems. _c .hjc ....,+..__a„Wmatie ..p_iRk er systems and standpipes she!! be Sprinkler systems are not required for buildings in compliance with Section 709. SHAFT ENCLOSURES Section 1706. (a) General. Openings extending vertically through floors shall be enclosed in a shaft or fire -resistive construction having the time period set forth in Table No. 17-A for "Shaft Enclosures." Protection for stairways shall be as specified in Sections 3309 and 3310. See Section 706 for exception in Group B, Division 4 Occupancies and Section 709 (j) for open parking garages. EXCEPTIONS: 1. In other than Group I Occupancies, an enclosure will not be required for openings which serve only one adjacent floor and are not connected with openings serving other floors and which are not concealed within the building construction. 2. In buildings hameing Gremp 9 geemp9neies equipped with automatic sprinkler systems throughout, enclosures shall not be required for escalators where the top of the escalator opening at each story is provided with a draft curtain and automatic fire sprinklers are installed around the perimeter of the opening within 2 feet of the draft curtain. The draft curtain shall enclose the perimeter of the unenclosed opening and extend from the ceiling downward at least 12 inches on all sides. The spacing between sprinklers shall not exceed 6 feet. 3. In Type V buildings, chutes and dumbwaiter shafts with a cross-sectional area of not more than 9 square feet may be unenclosed if lined on the inside with lath and plaster or gypsum wallboard, with such lining covered with not less than No. 26 galvanized sheet metal gauge with all joints in such sheet metal locklapped. All openings into any such enclosure shall be protected by metal or metal -clad doors with either metal or metal -clad jambs, casings or frames. 4. Exit enclosures shall conform to the applicable provisions of Sections 3309 and 3310. 5. In one-story and two-story buildings of other than Group I Occupancies, shafts for gas vents and for ducts or piping which extend through not more than two floors need not comply with Table No. 17-A. 6. Gas vents and noncombustible piping installed in walls of buildings passing through three floors or less need not comply with Table No.17-A. Such shafts shall be effectively draft -stopped at each floor or ceiling. SHAFT ENCLOSURES continued page 2 7. Noncombustible pipe and conduit may be installed and maintained within the cavity of fire - resistive walls, provided both the floor and wall penetrations are tightly sealed with a noncombustible material impervious to the passage of smoke. S. In buildings with Group H, Division 6 Occupancies, a fabrication area may have mechanical, duct and piping penetrations which extend through not more than two floors within that fabrication area. Penetrations for tubing, piping, conduit or duct shall be effectively draft -stopped at the floor level. The fabrication area, including the areas through which the ductwork and piping extend, shall be considered a single conditioned environment. ATRIUMS Section 1715 (a) General. Buildings of other than Group H Occupancy with automatic sprinkler protection throughout may have atriums complying with the provisions of this section. Such atriums shall have a minimum opening area and dimension as set forth in Table No. 17-B. (b) Smoke -control System. A mechanically operated air -handling system shall be installed that will exhaust smoke either entering or developed within the atrium. Exhaust openings shall be located in the ceiling or in a smoke trap area immediately adjacent to the ceiling of the atrium. The lowest level of the exhaust openings shall be located above the top of the highest portion of door openings into the atrium. Supply openings sized to provide a minimum of 50 percent of the exhaust volume shall be located at the lowest level of the atrium. When the height of the atrium is 55 feet or less, supply air may be introduced by gravity, provided smoke control is accomplished. When the height of the atrium is more than 55 feet, supply air shall be introduced mechanically from the floor of the atrium and be directed vertically toward the exhaust outlets. In atriums over six stories in height or where tenant spaces above the second story are open to the atrium, supplemental supply air may be introduced at upper levels. The exhaust and supply system for the atrium shall operate automatically upon the actuation of the automatic sprinkler system within the atrium or areas open to the atrium or by the actuation of two or more smoke detectors required by this section. The exhaust and supply equipment shall also be manually operable by controls designed for fire department use. The smoke -control system may be separate or integrated with other air -handling systems. When the smoke -control mode is actuated, air -handling systems which would interfere with the smoke -control system shall be automatically shut down. a), leein Ne. 2 m- The atrium smoke -control system shall exhaust not less than the following quantities of air: 1. For atriums having a volume of not more than 600,000 cubic feet, including the volume of any levels not physically separated from the atrium, not less than six air changes per hour nor less than 40,000 cfm. A lesser cfm is acceptable if it can be shown by test that smoke will not migrate beyond the perimeter of the atrium. 2. For atriums having a volume of more than 600,000 cubic feet, including the volume of any levels not physically separated from the atrium, not less than four air changes per hour. ATRIUMS continued page 2 Smoke detectors which will automatically operate the atrium smoke - control system shall be installed at the perimeter and on the ceiling of the atrium and on the ceiling of each floor level that is open to the atrium. In floor levels open to the atrium, such detectors shall be within 15 feet of the atrium. Detectors shall be located in accordance with their listing. (c) Enclosure of Atriums. Atriums shall be separated from adjacent spaces by not less than one-hour fire -resistive construction. EXCEPTION: Open exit balconies are permitted within the atrium. Openings in the atrium enclosure other than fixed glazing shall be protected by smoke -and draft -control assemblies conforming to Section 3305(h). EXCEPTION: Other tight -fitting doors which are maintained automatic closing, in accordance with Section 4306 (b), _by actuation of a smoke detector, of self closing may be used when protected as required for glazed openings in Exception 2 below. Fixed glazed openings in the atrium enclosure shall be equipped with fire windows having a fire -resistive rating of not less than three- fourths hour, and the total area of such openings shall not exceed 25 percent of the area of the common wall between the atrium and the room into which the opening is provided. EXCEPTIONS: 1. In Group R, Division I Occupancies, openings may be unprotected when the floor area of each guest room or dwelling unit does not exceed 1000 square feet and each room or unit has an approved exit not entering the atrium. 2. Guest rooms, dwelling units and tenant spaces may be separated from the atrium by approved fixed wire glass set in steel frames. In lieu thereof, tempered or laminated glass may be used, subject to the following: A. The glass shall be protected by a sprinkler system equipped with 135 degrees F heads. The sprinkler system shall completely wet the entire surface of the glass wall when actuated. Where there are walking surfaces on both sides of the glass, both sides of the glass shall be so protected. ATRIUMS continued page 3 B. The glass shall be in a gasketed frame so installed that the glazing system may deflect without breaking (loading) the glass before the sprinkler system operates. C. Obstructions such as curtain rods, drapery traverse rods, curtains, drapes or similar materials, shall not be installed between the sprinkler and the glass. The separation between the tenant space and the atrium as specified within Exception 2 may be omitted on a maximum of any three floors levels, provided the remaining floor levels are separated as specified herein. the `rave "-` --- ° 0w—toe-%eegwey-e ----- a (e) Group I Occupancy Exits. In Group I Occupancies, other than jails, prisons and reformatories, sleeping rooms shall not be permitted to have required exits through the atrium. (f) Occupancy Separation Exceptions. The vertical portion of the occupancy separation which is adjacent to the atrium may be omitted between a Group B. Division 2 Occupancy office or sales area or Group A, Division 3 Occupancy and Group R, Division I apartment or guest room located on another level. (g) Standby Power. The smoke -control system for the atrium and the smoke -control system for the tenant space are to be provided with standby power as required in Section 1807(i). (h) Interior Finish. The interior finish of walls and ceilings of the atrium and all unseparated tenant spaces allowed under the last paragraph of Subsection (c) above shall be Class I with no reduction in class for sprinkler protection. (i) Acceptance of the Smoke -control System. Before the Certificate of Occupancy is issued, the smoke -control systems shall be tested in an approved manner and shall show compliance with the requirements of this section. (j) Inspection of the Smoke -control System. All operating parts of the smoke -control systems shall be tested by an approved inspection agency or by the owner or his representative when so approved. Such inspections shall be made every three months and a log or the tests be kept by the testing agency. The log shall be on the premises and available for examination by fire department personnel. ATRIUMS continued page 4 EXITS REQUIRED continued page 2 (e) Access to Exits. When more than one exit is required, they shall be so arranged that it is possible to go in either direction from any point in a corridor to a separate exit, except for dead ends not exceeding 20 feet in length. EXCEPTIONS: 1. In buildings of Group B2 Occupancy equipped throughout with an approved automatic sprinkler system, the maximum dead—end distance shall not exceed 30 feet. CORRIDORS AND EXTERIOR EXIT BALCONIES Section 3305 (g) Construction. Walls of corridors serving a Group R, Division 1 or Group I Occupancy having an occupant load of 10 or more and walls of corridors serving other occupancies having an occupant load of 30 or more shall be of not less than one-hour fire -resistive construction and the ceilings shall not be less than that required for a one-hour fire -resistive floor or roof system. EXCEPTIONS: 1. One-story buildings housing Group B, Division 4 Occupancies. 2. Corridors more than 30 feet in width where occupancies served by such corridors have at least one exit independent from the corridor. (See Appendix Chapter 7, Division I, for covered malls). 3. Exterior sides of exterior exit balconies. 4. In Group I. Division 3 Occupancies such as jails, prisons, reformatories and similar buildings with open -barred cells forming corridor walls, the corridors and cell doors need not be fire -resistive. 5. Corridor walls and ceilings need not be of fire - resistive construction within -4444o—e4kaw-s6- aq` P -ith an autozatic k lew -tkFeeghaut -eek- smelee-deteeters ere iRetalled :. hi R t h., GQFFidor Witti t.4 -8'ingr buildings of Group B occupany protected t rout out witH an aDDroved automatir 6. In other than Type I or II construction, exterior exit balcony roof assemblies may be of heavy timber construction without concealed spaces. When the ceiling of the entire story is an element of a one-hour fire -resistive floor or roof system, the corridor walls may terminate at the ceiling. When- the room -side fire -resistive membrane or the corridor wall is carried through to the underside of a fire -resistive floor or roof above, the corridor side of the ceiling may be protected by the use of ceiling materials as required for one-hour floor or roof systems construction or the corridor ceiling may be of the same construction as the corridor walls. CORRIDORS AND EXTERIOR EXIT BALCONIES continued page 2 Ceilings of noncombustible construction may be suspended below the fire -resistive ceiling. For wall and ceiling finish requirements, see Table No. 42-B. SCOPE Section 3801 (d) Standards. Fire -extinguishing systems shall comply with U.B.C. Standards Nos. 38-1 and 38-2. EXCEPTIONS: 1. Automatice fire -extinguishing systems installed as specified in Section 3808. 2. Automatic fire -extinguishing systems not covered by U.B.C. Standard No. 38-1 or 38-2 or by Section 3808, shall be approved and installed in accordance with the Fire Code. 3. Automatic sprinkler systems may be connected to the domestic water supply if the domestic water supply is of adequate pressure, capacity and sizing for the combined domestic and sprinkler requirements. In such case, the sprinkler system connection shall be made between the public water main or meter and the domestic shutoff valve, and there shall not be intervening valves or connections except as permitted in Section 3808. The fire department connection may be omitted when approved by the fire department. 4. In addition to the approved piping materials specified in U.B.C. Standard No. 38-1. polybutylene piping conforming to American Society for Testing and Materials Standards ASTM. D2662-82, ASTM D2666-82, ASTM D3000-73 or ASTM D3309-83 may be installed in automatic fire - extinguishing system as specified in Section 3808, and as follows: A. All piping shall be installed in concealed locations within construction or above ceilings, except adequately supported and protected piping may be exposed in mechanical rooms or attic spaces not used for storage or habitation. B. All piping shall be adequately supported, including provision for temperature expansion and contraction by hangers or supports as approved for water service plumbing. Heat sink supports shall not be permitted. SCOPE continued page 2 C. All piping shall be protected from freezing when located in unheated spaces. D. Joints shall be made by fusion in accordance with the manufacturer's specifications, except that crimp rings and barbed fittings of brass, bronze or copper may be used with 3/4 -inch pipe. E. Minimum inside pipe diameter shall be 3/4 inch. F. All polybutylene piping located in any part of a system having a fire department connection shall be protected with a pressure regulating valve set for 175 psi. G. All systems including any polybutylene piping shall be designed by means of hydraulic computations. AUTOMATIC FIRE—EXTINGUISHING SYSTEMS Section 3802 (b) All Occupancies Except Group R, Division 3, Group B, Division 3 A DD and Group M. Except for Group R, Division 3, Group B, Division 3, and Group M Occupancies, an automatic sprinkler system shall be installed. 1. In every story or basement of all buildings when the floor area exceeds 1500 square feet and there is not provided at least 20 square feet of opening entirely above the adjoining ground level in each 50 lineal feet or fraction thereof of exterior wall in the story or basement on at least one side of the building. Openings shall have a minimum dimension of not less than 30 inches. Such openings shall be accessible to the fire department from the exterior and shall not be obstructed in a manner that fire fighting or rescue cannot be accomplished from the exterior. When openings in a story are provided on only one side and the opposite wall of such story is more than 75 feet from such openings, the story shall be provided with an approved automatic sprinkler system, or openings as specified above shall be provided on at least two sides of an exterior wall of the story. If any portion of a basement is located more than 75 feet from openings required in this section, the basement shall be provided with an approved automatic sprinkler system. 2. At the top of rubbish and linen chutes and in their terminal rooms. Chutes extending through three or more floors shall have additional sprinkler heads installed within such chutes at alternate floors. Sprinkler heads shall be accessible for servicing. 3. In rooms where nitrate film is stored or handled. 4. In protected combustible fiber storage vaults as defined in the Fire Code. PERMISSIBLE SPRINKLER OMISSIONS Section 3804. Subject to the approval of the building official and with the concurrence of the chief of the fire department, sprinklers may be omitted in rooms or areas as follows: 1. When sprinklers are considered undesirable because of the nature of the contents or in rooms or areas which are of noncombustible construction with wholly noncombustible contents and which are not exposed by other areas. Sprinklers shall not be omitted from any room merely because it is damp or of fire -resistive construction. 2. Sprinklers shall not be installed when the application of water or flame and water to the contents may constitute a serious life or fire hazard, as in the manufacture or storage of quantities of aluminum powder, calcium carbide, calcium phosphide, metallic sodium and potassium, quicklime, magnesium powder and sodium peroxide. 3. Safe deposit or other vaults of fire -resistive construction, when used for the storage of records, files and other documents, when stored in metal cabinets. 4. Communication equipment areas under the exclusive control of a public communication utility agency, provided: A. The equipment areas are separated from the remainder of the building by one-hour fire -resistive occupancy separation; and B. Such areas are used exclusively for such equipment; and C. An approved automatic smoke detection system is installed in such areas and is supervised by an approved central, proprietary or remote station service or a local alarm which will give an audible signal at a constantly attended location; and D. Other approved fire -protection equipment such as portable fire extenguishers or Class II standpipes are installed in such areas. 5. Other approved automatic fire -extinguishing systems may be installed to protect special hazards or occupancies in lieu of automatic sprinklers. 6. Open parking garages in accordance with Section 709. EXHIBIT "B" RECOMMENDED AMENDMENTS TO THE UNIFORM FIRE CODE 1985 PART III - GENERAL PROVISIONS FOR FIRE SAFETY ARTICLE 10 - FIRE PROTECTION DIVISION II GENERAL PROVISIONS FIRE APPARATUS ACCESS ROADS Section 10.207 (a) General. Fire apparatus access roads shall be provided and maintained in accordance with the provisions of this section. (b) Where Required. Fire apparatus access roads shall be required for every building hereafter constructed when any portion of an exterior wall of the first story is located more than 150 feet from fire department vehicle access. EXCEPTIONS: (1) In buildings protected throughout by an approve automatic sprin er system. (2) When there Division 3 requirements provided, in _fighting or impaired. are not more than two Group R, or Group M Occupancies, the of this section may be modified, the opinion of the chief, fire - rescue operations would not be DIVISION III INSTALLATION AND MAINTENANCE OF FIRE -PROTECTION, LIFE -SAFETY SYSTEMS AND APPLIANCES INSTALLATION Section 10.301. (a) Type Required. The chief shall designate the type and number of fire appliances to be installed and maintained in and upon all buildings and premises in the jurisdiction other than private dwellings. This shall be done according to the relative severity of probable fire, including the rapidity with which it may spread. Such appliances shall be of a type suitable for the probable class of fire associated with such building or premises and shall have approval of the chief. Portable fire extinguishers shall be in accordance with U.F.C. Standard No. 10-1. In buildings protected throughout by an Uproved automatic sprinkler system the allowable coverages may be increased a maximum of 50e per unit U1 A. STAIR CONSTRUCTION Section 1805. Stairs and stair platforms when _required by Section 309 shall be constructed of reinforced concrete, iron or steel with treads and risers of concrete, iron or steel. Brick, marble, tile or other hard non combustible materials may be used for the finish of such treads and risers. Stairs shall be designed and constructed as specified in Chapter 33. 4. STAIR CONSTRUCTION Section 1905. Stairs and stair platforms when required by Section 3309 of Type II-F.R. buildings shall be constructed of reinforced concrete, iron or steel with treads and risers of concrete, iron or steel. Brick, marble, tile or other hard noncombustible materials may be used for the finish of such treads and risers. Stairs of Type II one-hour and Type II -N buildings shall be of noncumbustible Construction. Stairs shall be designed and constructed as specified in Chapter 33. EXITS REQUIRED Section 3303 (c) Arrangement of Exits. If only two exits are required, they shall be placed a distance apart equal to not less than one half of the length of the maximum overall diagonal dimension of the building or area to be served measured in a straight line between exits. 2. When exit enclosures are provided as a portion of the required exit and are interconnected by a one-hour corridor conforming to the requirements of Section 3305(g), exit separations may be measured along a direct line of travel within the exit corridor. Enclosure walls shall be not less than 30 feet apart at any point in a direct line of measurement. When three or more exits are required, they shall be arranged a reasonable distance apart so that if one becomes blocked the others will be available. (d) Distance to Exits. The maximum distance of travel from any point to an exterior exit door, horizontal exit, exit passageway or an enclosed stairway shall not exceed 150 feet in a building not equipped with an automatic sprinkler system throughout, 200 feet in a building equipped with an automatic sprinkler system throughout, or 300 feet in Group B2 Occupancies (except wholesale and retail stores) equipped with an automatic sprinkler system throughout. In any occupany where a travel distance of 150 feet or 200 feet is permitted, these distances may be increased 100 feet when the last 150 feet is within a one-hour fire -resistive corridor, complying with Section 3305. See Section 3319 for Group E occupancy and Section 3320 for Group H Occupancy travel distances. In a one-story Group B, Division 4 Occupancy classified as a factory or warehouse and in one-story airplane hangars, the exit travel distance may be increased to 400 feet if the building is equipped with an automatic sprinkler system throughout. In an open parking garage, as defined in Section 109, the exit travel distance may be increased to 250 feet.