HomeMy WebLinkAboutOrd 0847 - 1973 Unfiorm Building Code ;.4 (I:
00
f atbi Of T UkVi l a
Washington
Cover page to Ordinance 847
The full text of the ordinance follows this cover page.
ORDINANCE ADOPTING THE 1973 UNIFORM BUILDING CODE
Ordinance 847 was amended or repealed by the
following ordinances.
AMENDED BY: REPEALED BY:
1012 §16 (part)
1013 §16 (part)
411
ciTy QF TUK
WASHINGTON
ORDINANCE NO. 847 Y
ORDINANCE ADOPTING THE 1973 UNIFORM BUILDING CODE
THE CITY COUNCIL OF THE CITY OF TUKWILA, WASHINGTON, DO
ORDAIN AS FOLLOWS:
That Chapter 16.04 of the Tukwila Municipal Code be
amended to read as follows:
16,04.010. Building Code Adopted: The Uniform Building
Code, 1973,Edition, published by the International Conference of
Building Officials, with Appendix Chapters 13, 23, 49 and 70,
three copies of which are on file in the office of the City Clerk,
regulating the erection, construction, enlargement, alteration,
repair, moving, removal, conversion, demolition, occupancy, equip
ment, use, height, area and maintenance of Buildings or Structures;
providing for the issuance of permits and collection of fees there-
for; declaring and establishing Fire Districts, and providing
penalties for the violation thereof, is hereby adopted by refer-
ence and made a part hereof as though fully set forth in this
chapter.
16.04.020. Chapter 17 (UBC), amended New Section
Added.
Chapter 17 (UBC), as above adopted, is hereby amended
by adding thereto the following:
Section 1717 (A) General. Foam Plastic shall comply
with smoke density and toxicity requirements of Section 5202.
(B) Unless otherwise specifically approved and with
that approval based on accepted diversified test such as, but not
limited to the tunnel test, full scale corner tests and an igni-
tion temperature test. The following shall apply to all uses of
foam plastics in or on walls and ceilings as follows:
1. Foam plastics having a flame spread of 75 or less
may be used within the cavity of a masonry wall or on the inside of
a building to cover the surface of a complying wall or ceiling if
it is fully protected by a thermal barrier of one half -inch gypsum
wall board or equivalent fire resistive materials.
2. Foam plastic insulation having a flame spread of 75
or less when tested in a thickness of 4 inches may be used in
thicknesses up to 10 inches for use in cold storage rooms, food
processing rooms, ice plants and similar rooms when the room is
protected with an automatic sprinkler system and the insulation
is covered with one -half -inch portland cement plaster or equiva-
lent fire resistive,materials.
3. Foam plastic insulation having a flame spread of 25
or less may be used in a thickness of not more than 4 inches when
the foam plastic is covered by a metal facing of 0.032 inches of
aluminum or 26 gauge°'steel or greater thicknesses of either metal
and the room is prot with automatic sprinklers. Such panels
shall not be used where non combustible or fire resistive con-
struction is required.
-1-
(C) Foam plastics may be used as a roof covering
if it is part of a Class A, B or C roofing assembly.
(D) Agricultural buildings located in Fire Zone No. 3
may have unprotected foam plastic having a flame spread of 25 or
less when such buildings are used exclusively for the storage of
farm produce, or for housing of livestock or poultry when such
buildings have but intermittent and limited occupancy by humans.
16.04.030. Section 1807 Amended Group F Buildings.
Section 1807 of the Uniform Building Code as adopted
by Section 16.04.010, is amended to read as follows:
Special Provisions for Group F, Division 2, Office
Buildings and Group H Occupancies.
Section 1807 (A) Scope. These requirements apply to
buildings housing Group F, Division 2, Occupancies.used primarily as
offices and group H occupancies.
Such buildings having floors used for human occupancy
located more than 75 feet above the lowest level of Fire Department
vehicle access shall conform to the requirements of this Section in
addition to other applicable requirements of this Code.
(B) Compartmentation. Compartmentation shall be pro-
vided in every building to provide areas of refuge for the build-
ing occupants. This may be provided by either of the following:
1. Horizontal exits dividing a story into two or
more areas of approximately the same size not
exceeding 30,000 square feet; or
2. Subdividing the building into five -story com-
partments by interrupting the stairshaft with
smoke barriers every fifth floor or through
the use of smokeproof enclosures for all stair-
ways or any other method which will protect
against the movement of smoke from one compart-
ment to another.
Openings in exterior walls, located vertically above
one another, shall be protected by approved flame barriers extending
30 inches beyond the exterior wall in the plane of the floor or by
vertical panels not less than 3 feet in height.
Horizontal exit walls used for compartmenting a building
shall not have openings therein which would permit transfer of
smoke from one compartment to the other except for required exits:,
(C) Fire Alarm. A manual fire alarm box shall be
located adjacent to exit doors into stairway shafts and in every
elevator lobby. The box shall be connected to the Central Control
Station and to the voice communication system as required by
Section 1807 (f) and (g). The system shall be designed in accord-
ance with U.B.C. Standard No. 18 -1.
(D) Fire Detectors. An approved system which will
provide for automatic detection of products of combustion other
than heat shall be installed in every mechanical equipment room
and in the return air portion of every air conditioning and
mechanical ventilation system that serves floors other than the
floor on which the equipment is located. The detectors shall be
set to operate within the limitations of U.B.C. Standard No. 43 -6
and shall be located at each opening into the vertical shaft.
-2-
(E) Voice Alarm System. Both the detection system
and the fire alarm system shall activate a voice alarm system
capable of being operated from the Central Control Station on
a general as well as a selective basis dependent upon the com-
partmentation involved. The alarm shall be designed to be
heard by all occupants within the building or designated por-
tions thereof as specified for the voice communication system.
The elevator lobby detector required by Chapter 51 shall be
connected to the system.
(F) Voice Communication System. There shall be two
separate, approved, continuously electrically- supervised
voice communications systems; one for Fire Department communi-
cation system and the other a public voice communication
(address) system between the central control station and the
following areas:
1. Elevators, elevator lobbies, corridors and
stairways.
2. Every office area exceeding 1000 square feet
in area.
3. Each dwelling unit and hotel guest room.
When approved, the Fire Department system may be com-
bined with the public voice communication system and voice
alarm system.
(G) Central Control Station. A central control station
for Fire Department operations shall be provided in a location
approved by the Fire Department, It shall contain the voice com-
munication systems panel, fire detection and alarm system panels,
status indicators and controls for elevators and air handling
systems, controls for unlocking stairway doors, a public tele-
phone, sprinkler valve and water flow detectors and standby
power controls.
(H) Smoke Control. Natural or mechanical ventilation
for the removal of the products of combustion shall be provided
in every story and shall consist of one or more of the following:
1. Panels or windows in the exterior wall which
can be opened from an approved location other
than the fire floor. Such venting facilities
shall be provided at the rate of at least 20
square feet per 50 lineal feet of exterior
wall in each story, and distributed around the
perimeter at not more than 50 -foot intervals.
Such panels shall be clearly identified as
required by the Fire Department.
2. Approved tempered glass may be used in lieu of
openable panels.
3. When fire sprinklers are installed in compliance
with Section 1807 (m) the mechanical air handling
equipment may be designed to assist smoke re-
moval. Under fire conditions, the return and
exhaust air shall be taken directly to the
outside without recirculation to other sections
of the building.
4. A shaft through which smoke and heat can be
mechanically vented to the outdoors. The size
of the shaft shall be uniform throughout and
-3-
of such dimensions as to provide not less than
60 air changes per hour in the largest compart-
ment served anywhere in the building. Openings
into the shaft shall be protected with an auto-
matic single piece shutter located as high in
the room as possible and designed to vent the
entire compartment.
5. Any other design which will produce equivalent
results.
(I) Elevators. There shall be provided at least one
elevator in each bank available for Fire Department access to
any floor. The elevator shall open into a lobby, which may
serve other elevators, and shall be separated from the remainder
of the building by construction as required for corridors. The
elevator may be located within a smokeproof enclosure. See
Chapter 51 for additional requirements.
(J) Standby Power and Light. An approved permanently
installed standby power generating system conforming to U.B.C.
Standard No. 18 -1 shall be provided. The system shall be
equipped with suitable means for automatically starting the
generator set upon failure of the normal electrical service and
for automatic transfer and operation of all the required electri-
cal functions at full power within 60 seconds of such normal
service failure. System supervision with manual start and trans-
fer features, shall be provided at the Central Control Station.
An on- premise fuel supply sufficient for not less than
two hours' full demand operation of the system shall be provided.
All power, lighting, signal and communication facilities provided
under the requirements of this Section shall be transferrable to
the standby power system.
The power requirement shall be determined so as to
provide service to, but not limited to, the following:
1. Fire alarm system.
2. Exit and other emergency lighting.
3. Fire protection equipment
4. Mechanical ventilation required by this
Section.
5. Fire Department elevator.
6. Voice communication system.
(K) Seismic Considerations. In Seismic Zones No. 2
and No. 3, the anchorage of the following mechanical and elect-
rical equipment required by the Section shall be designed in
accordance with Section 2314 for a lateral force based on a
Cp value of 0.5 unless data substantiating a lesser value is
furnished:
1. Elevator drive and suspension systems.
2. Standby power and lighting facilities
3. Fire pumps and other fire protection
equipment.
-4-
(L) Exits. All stairway doors which are to be locked
from the stairway side shall have the capability of being un-
locked without unlatching upon a signal from the Central Control
Station.
Emergency telephones available to the public shall be
provided at not less than every fifth floor in each required
stairway.
(M) Fire Sprinklers. Sprinkler protection conforming
to the following shall be provided:
1. The sprinkler system shall be hydraulically designed
using the parameters set forth in U.B.C. Standard
No. 38 -1 and the following:
(i) Shutoff valves and waterflow devices shall be
provided on each floor. In addition to actu-
ating a local alarm on the floor upon which
the water flow is detected, such valves shall
be supervised by a continuously manned control
station or by a central station.
(ii) The sprinkler system shall he looped between
standpipe risers at the bottom, top and mid
height of all buildings with a maximum of
20 stories served by any loop. The installa-
tion of check valves shall be approved by the
Building Official.
(iii) Pitching of lines is not required.
(iv) A minimum of two fire pumps independently
driven shall be provided and sized for the
sprinkler demand and for a minimum 500 gallons
per minute Fire Department standpipe operation.
(v) An on -site supply of water equal to a 20-
minute demand or 15,000 gallons on a combined
sprinkler and standpipe, whichever is the
smaller, shall be provided. This supply
shall be available automatically if the prin-
cipal supply fails.
(vi) Operation of the sprinkler system shall
activate the voice communication system.
2. When an automatic sprinkler system is installed, the
following reductions from the requirements of this
code are permitted:
(i) The fire resistive time periods set forth in
Table No. 17 -A may be reduced by one hour,,, but
in no case shall be less than one hour rated,
for interior bearing walls, exterior bearing
and non bearing walls, roofs and the beams
supporting roofs, provided they do not frame
into columns. All office building partitions
required to be one -hour fire resistive con-
struction by Table No. 17 -A and Section 3304(g)
may be of non combustible construction without
a fire resistive time period.
-5-
Openings in corridor walls shall be pro-
tected by tight fitting, self closing,
solid -core doors that need not have a fire-
resistive time period. In Group H occupan-
cies, corridor and dwelling unit or guest
room separation may be reduced to one -half
hour.
(ii) Travel distance to a horizontal exit or to
an enclosed stairway may be 300 feet.
(iii) Smokeproof enclosures may be eliminated if
each required stairway is pressurized as
provided in Section 3309 (h) to .15 inch of
water column.
(iv) Spandrel protection required by Section
1807(b) may be omitted.
16.04.035. Section 4201 Amended. Interior wall and
Ceiling Finish.
Section 4201 of the Uniform Building Code, as adopted
by Sec. 16.04.010, is amended to read as follows:
Section 4201. Interior wall and ceiling finish shall
mean interior wainscoting, paneling or other finish applied
structurally or for decoration, acoustical correction, surface
insulation or similar purposes. Requirements for finishes shall
not apply to trim, defined as picture molds, chair rails, base-
boards and handrails; to doors and windows or their frames, nor
to materials which are less than 1/28 -inch in thickness cemented
to the surface of walls or ceilings, if these materials have
flame- spread characteristics no greater than paper of this
thickness cemented to a noncombustible backing.
Foam plastics shall not be used as interior finish or
trim except as provided in Section 1717.
16.04.040. This Section is Hereby Repealed.
16.04.050. This Section is Hereby Repealed.
16.04.060. This Section is Hereby Repealed.
16.04.070. Fire Zones. The map attached to Ordinance
678 and described in the 1973 edition of the Uniform Building
Code, Chapter 16, is adopted as the fire zones of Tukwila,
except that the following described real property designated as
Fire Zone 2 by the above referred -to mapp, is hereby designated
as being in Fire Zone 3:
A portion of Government Lot 6, Sec. 35, Twp. 23 N.,
R. 4 E.W.M. in King County, Washington, lying
easterly of county road and southwesterly of a line
described as follows:
Beginning at a point in the southeasterly margin
of said road, which point is marked by an iron pipe
and from which point the Southwest corner of said
Government Lot 6 bears South 0 °58'10" West 313.17
feet and North 89 °01'50" West 505.54 feet, said
distances being measured respectively at right
-6-
angles to and along the South boundary line of
said Government Lot; and running thence South
67 36'00" East 380.5 feet to an iron pipe; thence
continuing South 67 36'00" East 50 feet, more or
less, to bank of Green River.
PASSED BY THE CITY COUNCIL OF THE CITY OF TUKWILA,
WASHINGTON, And approved by the Mayor, at a regular meeting
thereof this a 354 1 day of march 1974.
;;;;Cerweldr
Mayor
Attest:
i 7
22 22-1-q..
Cit Clerk
Approved as to Form:
ne fieek.
City Attorney
Published: i /91j /t22 //ryes 1 /�y
'1-