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HomeMy WebLinkAboutBldg/construction info . {��:,������'��� �;a�, ,� � ,�Ai , � � a , ! i - r , ' ..-- __._ "._ , . . ��t '� ;,-.-rl �-- � -- . . . -- _ '. _ . . _ _ ... . _. ... . �. � �. � -�. ' . . - . ...: , : � . ; 501-503.3 1994 UNIFORM BUILDING CODE � 5 . Chapter 5 � . � . GENERAL BUILDING LIMITATIONS ` � SECTION 501 —SCOPE Buiidines and structures shall comply�vith the location on propeny,area,hei�ht and other provi- sions of this chapter. For additional limitations or allowances for special uses or occupancies,see the following: � SECTION SUBJECT � 402 Atria ' 403 High-rise office buildinQs and Group R, � Division 1 Occupancies 404 Mal ls 311.9 Open parking structures - ' 307 Group H,Division 6 Occupancies 412 Aviation control towers 414 Agricultural buildings 3111 Membrane structures SECTION 502—PREMISES IDENTIFICATION j Approved numbers or addresses shall be provided for all new buildings in such a position as to be � plainly visible and legible from the street or road fronting the property. �' SECTION 503— LOCATION ON PROPERTY �031 GeneraL Buildings shall adjoin or have access to a public way or yard on not less than one ' side. Required yards shall be permanently maintained. . For the purpose of this section,the center line of an adjoining public way shall be considered an adjacent property line. (See also Section 1203.4.) 503.2 Fire Resistance of Walls. �03Z.1 General. Exterior walls shall have fire resistance and opening protection as set forth in Table 5-.A and in accordance with such additional provisions as are set forth in Chapter 6.Distance shall be measured at right angles from the property line.The above provisions shall not apply to j walls at right angles to the propeny line. � � Projections beyond the extenor wall shall comply with Section 705 and shall not extend beyond: i 1. A point one third the distance to the property line from an assumed vertical plane located _ ,� where fire-resistive protection of openings is first required due to location on propercy; or 2. More than 12 inches(305 mm) into areas where openings are prohibited. � � � �03.2.2 Area of openings. When openings in exterior walls are required to be protected due to i distance from property line,the sum of the area of such openings shall not exceed 50 percent of the total area of the wall in each story. 503.3 Buildings on Same Property and Buildings Containing Courts. For the purposes of de- �: terminin�the required wall and openin�protection and roof-covering requirements,buildings on � the same property and court walls of buildings over one story in height shall be assumed ro have a '�- property line between them. 1-84 - �} a �ro: > e.'�y1 ;� �c4;` 't�.0 t _ ., .. �J _ - �.~ 1 { '.: +�.- y�.. y 'j �T � { � Y i'�V i�'� '�' � Y y 3 . ) 1 d",.E ,e t . '.r� � -. � . - . . ..' . . .. . � - .. . � � . . '. � . . � ...._. ,. .. . - . ... .. .- . TABLE 5-A—EXTERIOR WALL AND OPENING PROTECTION BASED ON LOCATION ON y� PROPERTY FOR ALL CONSTRUCTION TYPES��2�3—(Continued) D Nonbearing OCCUPANCY CONSTRUCTION Distances are measured to property Ilnes(see Section 503). GROUPa 7YPE x 304.8 for mm LF��.R. Pour-hour N/C �our-hour N/C less than 3 feet Not perniitted less than 3 feet II-F.R. Two-hour N/C less than 20 fcet Protecled less than 20 feet f I I Onc-hour One-hour N/C less than 40 feet ���-N NR,N/C elsewhere [V-li.T. ❑One-hour One-hour N/C Same as bearing except Not pennitted less than 3 fee[ R--� NR,N/C 40 feet or greater 1[-N One-hour N/C less than 3 fcet Same as bcaring Not permitted less than 3 feet NR,N/C elsewhere V One-hour Onc-hour Same as bcaring Not permiucd less than 3 feet V-N One-hour Iess than 3 feel 5ame as bearing Not penniucd less Ihan 3 fect NR elsewhcre 1-�.R. Onc-hour N/C less than 10 fcet Samc as bcaring Not permitted Icss Ihan 5 fect 1I-I�.R. NR,N/C elsewhere Protec�cd Icss Ihan 10 fect 11 One-hour ll-N; S-4 111 Onc-hour tll-N N-H.'I'. Group S,Division 4 open parking gar,iges are nol permined in thcse typcs of consU�uc�ion. V One-hour V-N � ll Ono-hour One-hour N/C Same as bcaring except NR,N/C 40 Nol pennitted Icss than 5 fcel p fcet or greater Protccted Icss than 20 fccl C 1��-N� Onc-hour N/C Iess than 20 fcct S.ime as bearing except NR,N/C 40 Not pemiilted less than 5 fcet � NR,N/C elsewhere fee�or grealer Protccled less Hian 20 1¢et O S-5 � V Onc-h��ur One-huur Same as bcaring Not permiUed Icss(han 5 fect � _ Protectcd less Ihan 20[cc1 W C V-N� One-hour Iess than 20 Ceel Same as hearing Not pem�itted Icss than 5 feet r _ _ NR elscwhere Protected less than 20 feel � Z � n O v m I � �����Z� Four-hour N/C Four-hour N/C less Ihan 3 feet ��-�'��� Nvt permitted less Ihan 3 feet '' 111 One-hour Two-hour N/C Icss lhan 20 feet Protec�ed less than 20 fcet � II I-N One-hour N/C less than 40 feet fO A 1 V-1{.-r. NR,N/C elscwhcm C Z � II Qnc-hour Onc-hour N/C '�1 Same.�s bcaring except Not pemiitled less ihan 3 fcel � NR,N/C 40 feet or greater � V Onc-hour One-hour Same as bearing No(pennitted less than 3 fcet C If-N'- One-hour N/C less ihan 3 feet� NR,N/C elsewhere Same as bearing Not pemiitted less than 3 fce[ r v z � Same as bcaring � U-2 c� ��� o i�!/C—Noncomhus�ible. Not re�ulated p NR —Nonratcd. m I I.T.—Heavy timbcr. I'.R.—F�irc resislivc. �See Section 503 for typc,e of w,ills;iffectcd and requiremenis covering percentage of opcnings permi�led in exierior w;ills.I�or�valls facing slree�s,y;irds.ind public w.iys, sec also Scction 60 L5. 'Por addilional reslrictions see Ch:iplers 3 and(, �'�or special provisions and exceptions,see also Seclion 503.4. 'Sce Table 3-A for a description of each occupancy type. �Opcnings requiring prolection in exlcrior walls sh;ill be pro�ected by a fire;�ssembly having�t least a lhrce-fourths-hour fire-proleclion rating. '�tice Scction 3UR.2.I.Excc�liun 3. � ' D - �p3.�.� �Vood columns and arches. In Types III and iV construcuoa.�.;ooa�oiumns:uiu ai�rc� i - conformin�to heavy-timber sizes may be used extzmally when exterior walls are permicted to be • unprotected,noncombustible construction or�vhen one-hour tire-resistive noncombustible exteri- or walls are permi[ted. �03.�.� Group H Occupancies—minimum distance to property lines. Re�ardless of any other provisions,Group H Occupancies shall be sec back a minimum distance from propetty lines as set Torth in Items 1 throueh-�below.Discances shall be measured from the walls enclosinQ the occupan- cy ro all property lines.includin;those on a public way. 1. Group H.Division 1 Occupancies. No� less [han 75 fee�('_?860 mm) and not less than re- i quired by Table 3-F. i � 2. Group H.Divisions Z and�Occupancies.'Iot less[han 30 feet(91-�mm)When the area of the occupancy exceeds 1,000 square feet(93 m�)and it is not required ro be loca�ed in a detached build- ; ing. � 3. Group H.Divisions?and 3 Occupancies.�'ot less than�0 feet(15 ?=�0 mm)µ'hen a detached buildin� is required. See Table 3-F. �. Group H.Divisions 2 and 3 Occupancies containing materials wich explosive characteristics. _ Not less than the distances required by Table 3-F. �03din G reUuir d b,Table 31G,�there O no e quiremens tor wall and o�penin�prot ctioncb sed buil e q ; on locacion on propeny. � 503.�.7 Group H.Division-3 Occupancies. Group H.Division�l Occupancies having a floor area not esceedina�.500 square feet(232 m=)may have exterior bearing Walls of no[less than two-hour � fire-resistive conscruction when less than� feec(1�3=�mm) from a property line,and no[less than one hn�!r �,��h�^ le�s �'��n �0 fezt (6096 mm1 to a propertv lir.e. �03.-�.8 Group li,Division 1 Occupancies. ln Group U,Division 1 Occupancies,exterior walls that are required to be of one-hour tire-resistive construction due to locanon on propeny may be t procected only on the exterior side with mate�'als approved for one-hour tire-resistive construction. � ' � ' ' �. See Section �03. f �03.-1.9 Exterior wa(1 assemblies. Excerior wall assemblies complying with Section ?602.�.2 S mav be used in all types ot conscruccion. • SECTION 504—ALLOWABLE FLOOR AREAS _ �04.1 One-story Areas. The area of a one-story buildine shall not exceed the limits set Torth in Taole�-B except as provided in Section �0�. - �p:�? �,reas of Buildings over One Stor-y. The total combined floor area for multistory buildings :y mav be twice tha[permitted by Table�-B for one-story buildinQs,and the floor area of any singie � story shall not exceed that permitted for a one-scory bui]ding. : �04.3 :�llowable Floor?.rea of�Iixed Occupancies. When a building houses more[han one oc- � � cupancy,the area of the building shall be such that[he sum of the ratios of the acmal area for each ` separate occupancy divided by the rotal allowable area for each separate occupancy shall not ex- - ceed one. EXCEPTIOtiS: 1.The major occupancy classiFica[ion ot a building may oz used co determine the allow- c�Q18 ablz area of such building when the major use occupies not less than 90 percer[of the azea of any doo�of the 2V1`11MU building and pro�ided[hat other minor accessory uses shall not exceed the basic area perrnitted by Table�-B for such minor uses and that various uses are separated as specified in Seccion�02.4. ?.Groups B.F,�1 and S and Group H.Division 5 Occupancies complying wi[h the provisions of Section �05.2 may contain oeher occupancies pro�ided thac such occupancies do no�occupy more chan 10 percent of i [he area of any tloor of a buildine,nor more than the basic area permitted in the occupancy by Table�-B for i such occupancy,and further pro�ided that such occupancies are separated as specified in Section 302.4. � �04.�3 Vtezzanines. Unless considered as a separate story,the tloor area of all mezzanines shali be ?� s �included in calculatine the allowable floor area ot the stories in which the mezzanines are located_ Sp4.5 Basements. � basement need not be included in the total allowable area, provided such � basement does not exceed the area permitted for a one-story buildin�. � 50�.6 Area Separation Walis. 504.6.1 General. Each portion of a buildin�separated by one or more area separation walls which ^ comply with the provisions of this subsection may be considered a separate buildin�.The exten[and location of such area separation walls shall provide a complete separation. When an area separation wall also separates occupancies that are required to be separated by an � occupancy separation,the most restrictive requirements of each separation shall apply. - 4,6Z Fire resistance and openings. ?.rea separation walls shall not be lessehesisrive con- � �� I fire-resistive construction in Types I,II-F.R..III and IV buildings and two-hour Tir struction in Types II One-hour,II-N or V buildings.The total width of all openines in such walls shall not exceed 25 percent of the leneth of the wall in each story.All openinQs shall be protected by I a Fire assembly having a three-hour f re-protec[ion ra[ing in four-hour fire-resistive walls and one- % t � and one-half-hour fire-protection rating in two-hour fire-resistive walls. \ � c�s� Z F.ctensions hevond exterior walis. Area separation walls shall extend horizontally to the , ¢ 704.4-707.2 1994 UNIFORM BUILDING CODE � e , 704.4 Vlembers Carrying ':�fasonry or Concrete. All members carryin� masonry or concrete - � walls in buildin�s over one story in hei�ht shall be tire pro[ected w ith one-hour fire protection or the � � fire-resistive requirement of the wall, �vhichever is �reater. 704.5 Fire Protection Omitted. Fire protection mav be omitted from the bottom flanae of lintels spanning not over 6 feet(1829 mm),shelf anoles.or plates that are not a part of the structural Yrame. 704.6 Spray-applied Fireproofing. The density and thickness of spray-applied fireproofing ` shall be determined followin�the procedures set forth in U.B.C. Standard 7-6. _ ; SECTION 705—PROJECTIONS Cornices, eave overhangs,exterior balconies and similar architectural appendages extending be- j yond the floor area as defined in Section 207 shall conform to the requirements of this section.(See i Sections 100�and 1006 for additional requirements applicable to exterior exit balconies and stair- ways.) ' Projections from walls of Type I or fI construction shail be of noncombustible materials. Projections from walls of Type III,IV or V construction may be of noncombustible or combus- � tihle materials. Combustible projections located where openinas are not permitted or where protection of open- ings is required shall be of one-hour fire-resistive or heaw-timber construction conforming to Sec- : tion 60i.6. ' - i Fur projec�ions extending over public property,see Chapter 32. i ' For combustible ornamentation, see Sec�ion 601.5.4. � � For limitations on projection distances,see Sections�03.2 and 1204. � SECTION 706—CONSTRUCTION JOINTS i A construction joint,for the purpose of this section and Sections 709.8 and 710.6,is a division of a building that allows independent movement of the building,in any plane,which may be caused by thermal,seismic,wind loading or any other load.Construction joints installed in fire-resistive walls required to have protected openings or in fire-resistive floors or floor-ceilin;assemblies shall be protected with an approved material or construction assembly designed to provide the same degree of fire resistance as the floor or wall in which it is installed when tested in accordance with U.B.C. Standard 7-1. See Section 703.2. Such material or construction assembly shall be securely installed in or on the joint for its entire lenath so as not to dislodge,loosen or otherw�ise impair its ability to accommodate expected build- in�movemenu and to resist the spread of fire and hot gases. j � I SECTION 707—INSULATION � 707.1 General. Thermal and acoustical insulation located on or within floor-ceiling and roof-ceiling assemblies, crawl spaces, walls, panitions and insulation on pipes and tubing shall , comply with this section. Duct insulation and insulation in plenums shall conform to the require- i ments of the �Iechanical Code. EXCEPTION: Roof insulation shall comply with Section I�10. 707.2 Insulation and Covering on Pipe and Tubing. Insulation and coverinQ on pipe and tubing shall have a flame-spread rating no[[o exceed 2�and a smoke density not to exceed 450 when[ested � � in accordance with U.B.C. Standard 8-1. EXCEPTION: Foam plastic insulation shall comply with Secdon 2602. 1-112 _ .. . . _ . , . . . . - - - , . . ., ,, ,. - . r_. , _ . � . .