HomeMy WebLinkAboutRequirements for Group S Occupancies 311).9.1.3
311, 1997 UNIFORM BUILDING CODE
1_ � .
commerci power,'or in'bw7dings which undc%62= lterati ,re- 310.12 Special . iC hinmeys" andilh apparatus
pairs or ad 'ons regulat lby Section,3109.12�. .: shall conform to the require nts of Chapter3 and the Mechani-
310.9.1.4 tion within dwelling units. In dwellin units,a cal Code'
detectors be.installed-in'each sleeping room and t a point The storage,use and o
handling ie and combustible
centrally 1 in the corridor or area giving a each sep- liquids in Division 1 Occupancies in s000rdance with the
arate sleeping Urea When'the dwelling unit has mo than one Fire Code.
story and in Wings with basements,'a-detector' be in- In Division 1 Occupancies,dooeaduig`' rooms,in which
stalled on each s ry and in'the basement.In units where Class I flammable liquids are orlised. . ,� otected by
a story or baseme . is split into two or more_levels," smoke de- a fire assembly having�o. Such
tectorshall be'. ed on.t eer a hen the assembly,shall be suit-cl on
lower level' ' 'a s� '� each side of the duo`' l-inc (25. ;mm ;
P ,a e r. installed
eepmg rooms are ori aii'u'' `level;the de-'
on each level When FIRE DOOR- •C[ASED.
tector shall be placed t the ceiling of the upper l lin close prox-
imity to the stairway. dwelling units where the fling height of SEC 11 -REQUIREMENTS FOR.GROUP$
a room open to the y serving the bedroo exceeds that of OCCUPANCIES
the hallway by 24.inch (610 mm)or more,sm detectors shall
be installed in thehall ay and in the adjacen roo,'Detectors 311.1 Group S Occupancies Defined. Group S Oocaipancies
shall sound an alarm,a ble in all sleeping of the dwelling shall include the use of a building or structure;;ora portion thereof, "���••.JJJ
unit in which they are 1 ted. for storage not classified as a hazardous occupancy.Storage occu-
pancies shall include the following: �-^4
310.9.15 Location in.e deny dwelling ts,.congregate
residences and hotels. In fficiency dwe ' units,hotel suites Division 1.Moderate hazard storage occupancies shall include
and in hotel and congregat residence sleep' rooms detectors buildings or portions of buildings used for storage of combustible
shall be located on the ce,' or wall of th main room or each materials that are not classified as a Group S,Division 2 or as a
sleeping room.When sirup: grooms wi efticaency dwell- Group H Occupancy..,
h� x
ing unit or hotel suite are on upper leve a detector shall be Division 2. Low-hazard storage occupancies i-ahaili include
placed at the ceiling of the u per level m use proximity to the buildings,structures,or portions thereof,used for'storgge of non-
stairway.When actuated;the` elector sound an alarm audi- combustible materials, such as products on wood pallets or in
ble within the sleeping area of a dwelling t or congregate res- paper cartons with or without single-thickness divisions, or in
idence,hotel suite,or sleepin room in ch it is located. paper wrappings and shall include ice plants,,power plants and
310.9.2 Sprinkler and stand When required.by Pumping iipm such as knoch bs,handles oducts or���ibleowoh t ra
Section 904:2.1 or other provisi ns of code,automatic sprin- p wrapping"
kler systems and standpipes sh be igned and installed as storage occupancies shall include,but are not limited to,storage
specified,in Chapter�. of the following items:'
1.Beer or wine(in metal,glass or ceramic containers).
F 310.10 Fire Alarm Systems: up Division 1 Occupancies -�
F shall be provided with a manual d tomatic fire alarm system 2•Cement in bags.
F in apartment houses three or more 'es in height or Containing 3. Cold storage and creameries.
F 16 or more dwelling units,in hotels or more stories in height
F or containing 20 or more 4.Dairy products in nonwax-coated paper containers.
F g guest ms and in congregate resi- .
F dentes three or more stories in he_i or having an occupant load 5.Dry-cell batteries.
_._
F of 20 or more.A fire a'larm`and umcahon system shall be 6.Dryers.
F provided in Group R,Division 1 panties located in a high-
Frise building. 7-Dry pesticides in a building not classed as a Group H Oecu-
F IXCF.P110NS 1.A man fire panty.
Fneed not iv prol 8.Electrical coils.
F vided is buildings not over,tw stori m when all individual
F dwelling units and oo attic, crawl spaces.are separated 9.Electrical insulators.F from each other and public areas_by at least`one-hour
F fire-resistive ocm4mcy tions and individual dwelling unit 10.Electrical motors
F or guest room has ae,exit y to a Noway,exit court or yard 11.Empty cans.
F . 2.A separate fire alarm need be provided in buildings
F that are protected by an supervised fire WiWder 12.Foods in noncombustible containers
Fsystem having a loc$L toY all 13.Fresh fruits in nonplastic trays or containers.
F The alarm signal shall be `distinctive so d that is not used for 14.Frozen foods.
F any other purpose other the fire Alarmsignaling de-
F vices shall produce a soon that exceeds the revailing equivalent 15.Glass bottles(empty or-filled with nonflammable liquids).
Fcesound level in the room o b 15 minim
Y or ex- 16.Gypsum board.
FF ceeds any maximum so d level with a d tion of 30 seconds 17.Inert pigments.'
minimum by 5 decibels minimum,which is louder. Sound
Flevels.for alarm signals be 120 decibe maximum. 18. Meats.
F For the purposes of srction,area sepsis'on walls shall not 19.Metal cabinets.
F define separate buil ' 20.Metal furniture.
310.11 Heating. Dw :units, guest roo and congregate 21. Oil-filled distribution transformers.
residences shall be p 'ded with heating 'tiesntble of
maintaining a room rerature of.70°F(21°C)at a point 3 feet 22.Stoves.
(914 mm)above the our in-all habitable rooms. 23.Washers.
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gun# v111rvn0r ovlr.vl. -w-, 1011.1
311.2.3.5
Division PI,;4b on 3;Oompancies,;shall ditclude,repair 3.The height and the number of the-tiers above:the basement.
garages when br-k.'is limited to exchange of parts and mainte- shall be limited as specified in Table 3-H orSection 311.9:5
nance regttiring no:open flame or welding,:motor vehicle fuel- 4.The floor-ceiling assembly separating the Group S,bivision
dispensing stations,and Parking garages not classed as Group S, 3 and Group S, Division 4 Occupancy,-shell be.protected as
Division 4 c en�parkmg garages of Group U.pnvate garages.. required for the floor-ceiling assemb1yyof the S 3
t3 r{y. _ .
For the use of flatmable and.combustible liqurds;�see Section Occupancy. Openings between the Gi+ gDiv sioDn 313 d
307 andthe Group S,Division 4 Occupancy,excxptYeartN�peninm need'not
Divistp '} es�pec Secftoa 3119 be protected i uet+.
tM. 0-�g�8 ,
Y, 5.IleGrou
Division'S hangars where work is limited to"efchauge the parking or P ��n� vate _
Di �, ely jor
ofparts'and `ceiegiurirrgsnid' flaie btaireldinglslnd but may contain, r mtanical. den g .
helistops• AW'k . Pe C� � x
N:=,iiCr; •'t ►s ch�r�n;:•�� ..{ -� > .:;,; operation of the`bufi and- u 8n ce $-. ,War an t0 et
s •.:' =r' - rooms havmg',aitotal area of not more`xha 1000•square$feet
For occupancy separations;see Table 3 B (93 m2).
311.2 Construction,Height and Allowable Area. 311.23 SpedSc use provisions.
� ) 311.21 Gini aL"Buildings or parts`of buildmgs'classed in 311.23.1 Group S,Divisions 3 and 5 Oce upandes. In areas
Group S Occupancy because of the use or character of the occas- where motor vehicles,boats or aircraft arq'stor4-"aad'in motor
panty shall be liutited to the types of construction set forth in vehicle fuel-dispensing stations and repairgarages,floor surfaces
Table 5-B and shall not exceed,in area or height,the.limits speci- shall be of noncombustible,nonab ` t-qds.Floors shall
fied in Sections 504,505 and 506. drain to an approved oil separator'or trap discharging to sewers in
accordance with the Plumbing Code
311.2.2 Special provisions. EXCEPTION: Floors may be surfaced or waterproofed with
311.2.2.1 Group S, Division 3 with Group A--*Division 3; asphaltic paying materials in areas where motor vehicles or airplanes
Group,#tie�r� ip Vl or X Division 1,OcqapanLcysa , iv.t,Other are stored operated _
provisions.of;t'los oode.notwithstaading;abasement or, ust story 311.23.2•Marine or�motor veWde Lind-.ispensing sta-
of a building ii�iy,be considered as a separate aad distincE building tions. Marine oi`'inotor vehicle fuel dispensing stations;includ-
for the purpose ofarea limitations,limitation of number of stories ing canopies and supports over fuel dispensers, shall be of
and type of construction,when all of the following conditions are noncombustible,:fire-retardant-treated wood or of one-hour fire-
met: resistive construction.
1.The basement or first story is of Type I construction and is EXCEPTIONS: 1. Roofs of one-story fuel dispensing stations
separated from the building above with a three-hour occupancy may be of heavy-timber construction:.
P g P cY 2`Canopies conforming to Section 2603.13 may erected over
separation•S&Section 302.3. P
2. The burldwabove the three-hour-occ upancy separation Canopies under which fuels are dispensed shall have a clear,
contains only.Group A,Division 3;Group B;or Group M or R, unobstructed heightofnot less than.13 feet 6 inches(4114 mm)to
Division 1 Occupancies, the lowest projecting element in the vehicle drive-through area
3.The building below.the three-hour occupancy separation is a A.one-hour.;po upancy,separatton- eCd not, be,provided
Group S,Division 3 Occupancy used exclusively for the parking between fuel drspeasers.covered with a.canopy;that rs,open on
and storage.of private.or-pleasure-'type.motor vehicles,,; �or more sides,and a Group M Oocupancy.retail store.haying
an area of less than 2,500 square feet(232 m�)when the following
EXCEPTIONS:1.Entry lobbies,mechanical rooms and similar conditions exist:
uses incid=W to the operation of the bggd;ng : 1.The Group M'Occupancy is provided with two exitkor exit-
2 hmoue ,Division 3 and it occupancies
B odes,drinking and dining uses
access doorways separated as'required by'Section 1004.2.4 and
tablishmeatspad_Group Mretail ooarpancres in addition to those rases
incrdeatal toof thepmlding(mdading storage areas not located in the same exterior wall
We.teaon
provided that the entire structure below the three-hour ocapa nCy sep- 2.Fuel-dispenser islands are not located'within 20 feet{6096 '
} •�
aratron>s protected tlrroriglroat by an automatic sprmtla_system. mm)of the Gronp'M Occupancy retat7 store
4.'The maximum building height I.in feet shall not exceed the
limits'set forth in'Table 5-B for the least type of construction 311.233 Parking garage'headroom.'Parking garages'shall
involved have an unobstructed headroom clearance of not less than 7 feet
(2134 mm)above the.finish'floor to'any cetTing,beam,.pipe or
3113.2.2 Groap S,Division 3 Oempancy with Gmnp S,Divi- similar obstruction,except for wall-mounted-shelves,storage sur-
don 4 Occupancy above. Other provisions of this code notwith- faces,racks or cabinets. .
standing, a Group S, Division 3 Occupancy, located in the 311.23A Group S, Division 2 Occupancy roof framing. In
basement or first story below a Group S,Division 4 Occupancy,as Division 2 ci the roof- s stem'ma be of
defined in Section 311.9,may be classified as a separate and dis- •n. Y Y-
Y �P unprotected construction.
tinct building for the purpose of determining the type of construc-
tion when all,of the following conditions are met: 311.235 Vehicle barriers. In parking garages where any park-
1.The allowable area of the structure shall be such that the sum mg area is located more than 5 feet(1524 mm)above the adjacent
of the ratios of the actual area divided by the allowable area for grade,vehicle barriers shall be provided
each separate ' shall not exceed one. EXCEPTION:.Parking garages of Group.U,Division 1 Oboupan-
cies.
2. The Group S,-Division 3 Occupancy is'of Type I or U Vehicle barriers shall,have a minimum vertical dimension of
construction and is at least equal to the fire resistance of the Group 12 inches(305 mm)and shall be centered at 18 inches(457 mm)
S,Division 4 Occupancy. above the parking.surface.See Table 16-B for load criterion.
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-411.4
311,8,5 - 1997 UNIFORM BUILDING CODE
3113;Location on Property.For:fire-resistive ipmtection,of to street level and in that public occupancy is piblil'ted abd e-the
exterior walls and openings,=as'aetermined by-location on plop- street level.
erty,see Section 503.
OPEN PARIONNG GARAGE is a structure of I or II ( )
311A Access and Means of Fadlihes. Means of egress construction with the openings as described m Sethi n 1.9a2 ,.J✓
shall be provided as specifie`c�gin nits ter 10'' on two of more sides and that is'used dxc'"dnsiitel or e, `or
R, '` p'' storage-of private or pleasure- amotor�r.
Access to;and egress from,buildings required.to be accessible P assure" elticles.� .r
shall be provided as specified in Chapter 11. E%CFMON:'The grade-kvei tier
waiting and toilet rooms Laving a total area
3115 IjLght;Ventilatlon`an8 Sauttalioh:=lny��G� - square feQQep�t��(p9�3 m'2) Snch'area needbese a .
a ,tltgut,s ventilator-and Y♦ + _L ' 1.[ 4 ,4 •.�"",4".�, 'Z�`ff.7�:
Chap�ers"12 and 29,'ex*9li6tea bekow'rt` the` MP-ACCESS O
1.5.1 Repair and storage �°g �employing a series of continuonsky ristagfloors
f;��ge8, aircraft bangers. See or a series of interconnecting.ramps between floors�ermttting the
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Section 1202.2.6 for ventilation requirements for Group S,Divi- movement of vehicles under thea own power from'and the
sion 3 repair garages,storage garages.and Group S,Division 5 air- street level.
craft hangars. z1ac.
311.5y Parking garages ;: 3119.2.2 Openings. For natural ventilation purposesythe exte- Q
. See Section 1202.2.7,for ventilation rior side of the structure shall have umfornilyishi`bu requirements for for parking garages, uW on two or`more sides.The sees of such openings in exterior
walls on a tiei must be at least 20 percent of the total perimeter
311.6 Shaft and Exit Enclosures. Exits shall be enclosed as wall area of each tier. a aggregate lehigth'of the openings con-
specified in Chapter 10. sidered to be providing natural ventilation shall eonstitttte i mini-
Elevator shafts,vent shafts and other openings through floors mum of 40 percent of the perimeter of the tier.Interior wall lines
shall be enclosed,and the enclosure shall.be as specified in Sec- and column lines shall be at least 20 percent open with uniformly
tion 711. K :,: ; : distributed opgmngs. , t _ ,' st
„ .
:ERCEPTION:In Group S,Division 2 occupancies,exits shall be 31193�:o,rnstractioa. Constructor shall be`s of oneom'hus
enclosed as specified in Chapter,10,but other through-floor openings tible'materials.""Open ....r.r ' s '
need not be enclosed Pte ' shall meete design.
requirements of Chapter 16:For vehicle barriers; see'Set.ction
In buildings housing Group S Occupancies equipped with auto- 311.2.3.5.
matic sprinkler systems throughout,enclosures.need not be pro-
P 3119.4 Area and height. Area and height ofopen parking
vided for escalators where the top of the escalator opening at each gages shall be limited as set forth in Table 3-H,.except for
story is provided with a draft curtain and automatic fire sprinklers increases'allowed by Section 31195. '
are installed around the perimeter of the opening within 2 feet :, _
(610 mm)of the draft curtain.The draft curtain shall enclose the In structures having a spiral or sloping floor;the horizontal pro-
perimeter.of the unenclosed opening and extend from the ceiling ectioan o arestructure
tructureeaat n cross section shall not,exceed the
downward at least 12 inches(30$mm)on all sides.The spacing per parking tier.In the case:of a sftictue'liavirig a
between sprinklers shall not exceed 6-feet(1829:mm). continuous spiral floor,each 9 feet 6 inches(2896 mm)of height;
or portion thereof,shall be considered.a'ter z'C,A""='
311.7 Sprinkler and Standpipe Systems Vhen.i+egtured bY. The clear height of a
Section 904:2 or other provisions of this code,automatic sprinkler parking tier shall not be less than 7 feet
sP�� (2134 mm),except that a lower clear height may be ptmitted in
systems''and'standpipes shall lie'installed as ed in-Cha
ter 9. specifi P- mechanical-access open parking garages when approved by the
building official.
311.8 Special Hazards.,Storage and use-of flammable and 31195 Area and_height Inerrases.. Ile area and height of
combustible liquids shall be in accordance with the Fire Code. structures with cross ventilation throughout may be�incxeased in
Devices generating a glow;spank or flame capable of igniting accordance with provisions of this section.Structnes with"sides
open on three'fourths'of the buil
flammable vapors shall be installed such that sources of ignition perimete'may.b6'#nlcrcased
b 25 percent in area and one ie in h . "-t
are at least 18 inches{457 mm)above the floor of any room in y � eight.$tructures yPith sides
which Cass I flammable liquids or flammable gases are used or open around the entire building perimeter may be increased 50
stored. percent in area and one tier in height.For a side to be considered
open under the above provisions,the total area of opemngss along
Buildings erected or converted to:house high-piled oombus- the side shall not be less than 50 percent of the interior area of the
tible stock or aerosols shall Comply.with the Fire Code. side at each tier,and such openings_shall be,equally,distributed
3119 Group S,Division 4 Open Parking Garages, along the length of the tier. j
3119.1 Soo Except where �n l��garages constructed to heights less than the max-
311.9.1specific provisions are made in imums established by Table 3-H may have individual tier meas �.
ments of this code shall exceeding those otherwise permitted,provided the gross
the following sections, other require tier area
apply' of the structure does not exceed that permitted for the e i.am
3119.2 Definitions. structure.At least three sides of each such IarW tier shall have
continuous horizontal openings not less than 30 inches,(762 mm)
3119.2.1 General. For the purpose of this section,certain terms in clear height extending for at least 80 percent of the length of the
are defined as follows: sides,and no part of such larger tier shall be more than Vo feet j l
(60 960 mm)horizontally from such'an coing k add"each
MECHANICAL-ACCESS OPEN PARSING GARAGES such opening shall face a street or yard accessible to a street with a
are open parking garages employing parking machines,lifts,ele- width of at least 30 feet(9144 mm)for the full length of the open-
vators or other mechanical devices for vehicles moving from and ing,and standpipes shall be provided in each,such
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