HomeMy WebLinkAboutOrd 1974-1570 „ . � .
. ' , . , � . . . •
� . ORDINANCE N0. 1570 � �
AN ORDINANCE OF THE CITY OF CHULA VISTA, CALIFORNIA, AMENDING
SECTIONS 8. 1 , 8.2, 8.5, 8.6, 8.7, 8.9, 8. 10, 8. 14, "-`; 8.43,
$•46, $•51 , 8•52> 8.53> $•55 AND 8.56 OF CHAPTER 8 OF THE CHULA
VISTA CITY CODE, ALL RELATING TO THE ADOPTION OF THE UNIFORM
BUILDING CODE, VOLUME I , 1973 EDITION AND THE APPENDIX.
THE CITY COUNCIL OF THE CITY OF CHULA VISTA, CALIFORNIA, DOES ORDAIN AS
FOLLOWS:
SECTION I . That Section 5. 1 , 8.2, 8.5, .8.6, 8.7, 8.9, 8. 10, 8. 14,
8.43, 8.46, 8.51 > 8.52> 8.53> 8.55 and 8.56 of Chapter 8 of the Chula Vista
City Code be, and the same are hereby amended to read as follows:
Section 8. 1 . ADOPTED BY REFERENCE. There is hereby adopted by reference
the "Uniform Building Code, 1973 Edition, Volume I , and the Appendix” with the
exception of Section 2314(1 ) and Chapter 13, Chapter 70 and Section 2314(1 ) of
the Appendix. That certain document, as copyrighted by the International Con-
ference of Building Officials, three (3) copies of which are on file in the
office of the City Clerk. Said document, with the exception of Section 2314(1 ) ,
and Chapter 13, Chapter 70 and Section 2314(1 ) of the Appendix, is hereby adopted
as the Building Code of the City of Chula Vista, for regulating the erection,
construction, enlargement, alteration, repair, moving, demolition, conversion,
occupancy, use, height, and area of all buildings and structures in the City,
providing for the issuance of permits and collection of fees therefor; and each
and all such regulations, provisions , penalties, conditions and terms of the
Uniform Building Code, 1973 Edition, Volume I and Appendix, with the exception
of Section 2314(1 ) and Chapter 13, Chapter 70 and Section 2314(1 ) of the Appendix
are hereby referred to, adopted, and made a part hereof, as though fully set forth
herein, excepting such portions as are hereinafter deleted, modified or amended.
Section 8.2. Section 301 (a) of the Uniform Building Code is hereby amended
to read as follows:
Section 301 (a) . PERMITS REQUIRED. No person, firm or corporation shall
erect, construct, enlarge, alter, repair, move, improve, remove, convert or
demolish any building or structure in the City of Chula Vista or cause the same
to be done, without first obtaining a separate building permit for each such
building or structure from the Building Official except the following:
1 . Fences and free-standing masonry walls up to 36 inches in height.
2. Curbs, retaining walls and planter boxes up to 18 inches in height.
3. Patio covers up to 100 square feet and at least 6 feet from any other
building on the same property.
4. One-story tool and storage sheds and other accessory buildings with not
more than 100 square feet of projected roof area.
5• Television and radio antennas supported on roofs.
6. Awnings projecting up to 6 feet and attached to the exterior walls of
buildings of Group I or J occupancy.
7. Standard electrolier not over 35 feet in height above finish grade.
8. Repairs which involve only the replacement of component parts of existing
work with similar materials for the purpose of maintenance, and which do not ag-
gregate over $100.00 in valuation in any twelve month period, and do not affect any
electrical or mechanical installations. Repairs exempt from permit requirements
shall not include any addition, change, or modification in construction, exit
facilities, or permanent fixtures or equipment. Specifically exempted from permit
requirements without limit to valuation are:
a. Painting and decorating.
b. Installation of floor covering.
c. Cabinet work.
d. Outside paving. �
e. Reroofing buildings of Group I and J Occupancies located within
Fire Zone 3. —/-
This Section shall not be construed to require separate building permits for
a dwelling and auxiliary buildings or structures on the same property which are
described in the building permit application, plot plan, and other drawings.
Section 8.5. Section 303 of the Uniform Building Code is hereby amended
by adding subsections (c) , (d) , (e) , and (f) thereto to read as follows:
(c) Expiration of Plan Check. Applications for which no permit is issued
and on which no action is taken by the applicant within 240 days following the
date of application shall expire by limitation and plans submitted for checking
may thereafter be returned to the applicant or destroyed by the Building Official .
The Building Official may extend the time for action by the applicant for a period
not exceeding 240 days upon written request by the applicant showing that circum-
stances beyond the control of the applicant have prevented action from being taken.
(d) Compliance Survey Fee. The fee for conducting a compliance survey of
an existing structure shall be $.50 per 100 square foot or fraction thereof of
floor area, but not less than $25.00.
(e) Reinspection Fee. The fee for reinspection shall be $10.00.
(f) Exceptions. The United States, the State of California, school districts,
counties, cities and other public agencies shall not be required to pay any fees
for filing an application for a building permit pursuant to this Code.
Section 8.6. Section 304 of the Uniform Building Code is hereby amended by
added subsection (g) to read as follows:
(g) 'Compliance Survey= lnspection: �Upon.'receipt of a written request for a
compliance survey from the owner and payment of the fee specified in Section 303(d) ,
the Building Official may inspec[ an existing structure to ascertain its compliance
with the provisions of this Code and other applicable laws and ordinances, and
report his findings in writing to the owner.
Section 8.7. Section 1709(a) of the Uniform Building Code is hereby amended
to read as follows:
Parapets. Section 1709�a) General . Parapets shall be provided on alt exterior
walls of buildings, except as follows:
l . Walls not required to be of fire-resistive construction.
2. Walls which terminate at roofs of not less [han two hour fire-resistive
construction or roofs constructed entirely of noncombustible materials.
3• Walls where unprotected openings are permitted.
4. Walls on buildings having a floor area of not more than 1 ,000 sq. ft.
per floor.
5. Walls on buildings of Group H, I or J occupancy not more than 25 feet in
height and provided with a fire retardant roof covering.
6. Conversion of existing Group I occupancy to Group F occupancy.
Section 8.9. Section 2314(d) , (i ) , (j) , and Table 23-1 of the Uniform
Building Code is hereby amended to read as follows: ,
Section 2314(d) . Minimum Earthquake Forces for Structures.
l . Total lateral force and distribution of lateral force. Except as provided
in Section 2314(d) 2 and Section 2314(d) 4, every structure shall be designed and
constructed to act nonconcurrently in the direction of each of the main axes of the
structure in accordance with the following formula:
v=zKCw . . . . . . . . . . . . . (14-1 )
The value of K shall be not less than that set forth in Table No. 23-1 .
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The value of C shall be determined in accordance with the following formula:
0.05
c--3�. . . . . . . . . . . . . . (t 4-z)
� T
For all one-and two-story buildings or structures the value of C shall be not
less than 0. 10. For other buildings the maximum value of C need not exceed
0. 10.
EXCEPTION: C exceeds 0. 10 where indicated in Table No. 23-1 . T is the
fundamental period of vibration of the structure in seconds in the direction
under consideration. Properly substantiated technical data for establishing
the period T may be submitted. In the absence of such data, the value of T
for buildings shall be determined by the following formula:
O.OSh��
T = . . . . . . . . (14-3)
Vp . . . .
EXCEPTION: In all buildings in which the lateral force resisting system
consists of a moment-resisting space frame which resists 100 percent of the
required la[eral forces and which frame is not enclosed by or adjoined by
more rigid elements which would tend to prevent the frame from resisting
lateral forces:
T = 0. 10 N . . . . . . . . . . . . . (14-3A)
The total lateral force V shall be distributed in the height of the structure
in the following manner:
F� _ .004v rh��zl. . . . . . . . . . . . . . (14-4)
s ,
F need not exceed 0. 15V 1nd mey be considered as 0 for values (h��l of 3 or
less, and 1`nsJ
`
F5= �V - F� ) w� h� . . . . . . . . �14-5)
n
E"'1 hl
� _ ,
EXCEPTION: One- and two-story buildings shall have uniform distribution.
At each level designated as x, the force F shall be applied over the area of
the building in accordance with the mass distribution on that level .
2. Structures having irregular shape or framing systems. The
distribution of the lateral forces in structures which have highly irregular
shapes, large differences in lateral resistance or stiffness between adjacent
stories or other unusual structural features shall be determined considering
ihe dynamic characteristics of the structure.
3• Lateral force on parts or portions of buildings or other
structures. Parts or portions of buildings or structures and their anchorage
shall be designed for lateral forces in accordance with the following formula:
FP = ZCPWP . . . . . . . . . . . . . . . . . . (14-6)
The values of C are set forth in Table No. 23-1 . The distribution of these
forces shall be according to the gravity loads pertaining thereto.
4. Dynamic Analysis. Nothing in Section 2314 shall be deemed to
prohibit the submission of properly substantiated technical data for establishing
the lateral design forces by a dynamic analysis. •
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�o
5. Pile Foundations. Individual pile or caisson footings of
every building or structure shall be interconnected by ties each of which
can carry by tension and compression a horizontal force equal to 10 percent
of the larger pile cap loading unless it can be demonstrated that equivalent
restraint can be provided by other approved methods.
Section 2314 (i) Setbacks. Buildings having setbacks wherein the plan
dimension of the tower in each direction is at least 75 percent of the cor-
responding plan dimension of the lower part may be considered as a u`niform
building without setbacks, providing other irregularities as defined in
Section 2314 (d) 2 do not exist. Buildings having such irregularities shall
conform to the provisions of Section 2314 (d) 2. Other setback buildings
shall conform to the provisions of Section 2314 (d) 2.
Section 2314 (j) Structural Systems.
1 . Design requirements. All buildings designed with a horizontal
force factor K= 0.67 or 0.80 shall have space frames-ductile moment resisting.
Buildings more than 160 feet in height shall have space frames-ductile
moment resisting capable of resisting not less than 25 percent of the required
seismic forces for the structure as a whole. '
EXCEPTIONS: Buildings more than 160 feet in height in Seismic Zone No. 1
may have concrete shear walls designed in conformance with Section 2627 of
this Code in lieu of a ductile moment resisting space frame, provided a K
value of 1 .00 or 1 •33 is utilized in the design.
In Seismic Zones No. 2 and No. 3 all members in braced frame of K=1 .0
and K=1 .33 buildings shall be designed for 1 .5 times the force determined in
accordance with Section 2314 (d) 1 . Connections shall be designed to develop
the full capacity of the members or shall be based on stresses without the
one-third increase usually permitted on those resulting from earthquake forces.
In Seismic Zones No. 2 and No. 3 concrete space frames required by design
to be part of the lateral force resisting system and all concrete frames- located �
in the perimeter line of vertical support shall be space frames-ductile moment
resistin9.
EXCEPTION: Frames in the perPmeter line of the vertical support of buildings
designed with shear walls taking 100 percent of the design lateral forces
need only conform with the following paragraph.
In Seismic Zones No. 2 and No. 3 framing elements not required by design
to be part of the lateral force resisting systems shall be investigated and
shown to be adequate for vertical load-carrying capacity and induced moment due
to four times the distortions resulting from the Code required lateral forces.
The rigidity of other elements shall be considered in accordance with Section
2314 (e) . If the framing elements do not have sufficient deformation capacity
within their strength range, then deformation capacity shall be provided by
ductility or other means.
Moment resisting space frames and ductile moment resisting space frames
may be enclosed by or adjoined by more rigid elements which would tend to prevent
the space frame from resisting lateral forces where it can be shown that the
action or failure of the more rigid elements will not impair the vertical and
lateral load resisting ability of the space frame. Other structural concepts
may be approved by the Building Official when evidence is submitted showing
that equivalent ductility and energy absorption are provided.
2. Construction. The necessary ductility for a ductile moment-resisting
connection (complying with Section 2722 for building in Seismic 2one No. 2 and
No. 3 or Section 2723 for buildings in Seismic Zone No. 1) or by a reinforced
concrete frame (complying with Section 2626 for buildings in Seismic Zones No. 2
and No. 3 or Section 2625 for buildings in Seismic Zone No. t) .
- 4 -
Braced frames in buildings shall be composed of axially loaded bracing
members of A36, A440, A441 , A57z (except Grades 60 and 65) or A588 structural
steel ; or reinforced concrete members conforming to the requirements of Section
2627.
Reinforced concrete shear walls for all buitdings shall conform to the
requirements of Section 2627. In buildings where K = 0.67 and K = 0.80, all
structural elements below the base required to transmit seismic forces to the
foundation shall be composed of structural steel (complying with Section 2722
for buildings in Seismic Zones No. 2 and No. 3 or Section 2723 for buildings
in Seismic Zone No. 1) or by reinforced concrete (complying with Section 2626
for buildings in Seismic Zones No. 2 and No. 3 or with Section 2625 for buildings
in Seismic Zone-No. 1 and with Section 2627 for buildings in Seismic Zones No. l ,
2 and 3) •
Section 8. 10. Section 2609 (d) of the Uniform Building Code is hereby
amended to read as follows:
Section 2609 (d) Required Strength. The required strength U provided to
resist dead load D and live load L shall be at least equal to
u = 1 .5D + 1 .8L . . . . . . . . . . . . . . . (9-1 )
In the design of a structure or member, if resistance to the structural effects
of a specified wind load W must be included in the design, the following combi-
nations of D, L, and W shall be investigated in determining the greatest required
strength U.
U = 0.75 (1 .5D + 1 .8L + 1 .7W . . . . . . . . . �9-2)
where the cases of L having its full value or being completely absent shall
both be checked to determine the most severe condition, and
u = 0.9D + 1 .3w . . . . . . . . . . . . . . . . (9-3)
but in any case the strength of the member or structure shall not be less than
required by Formula (9-1) •
Where earthquake loads are a consideration, the requirements of the pre-
ceding paragraph shall apply except that_ l . lE shall be substituted for W in
Formulas (9-2) and (9-3) • Load factors contained in Section 2626 and Section
2627 shall be used where applicable.
If lateral earth pressure H must be included in design, the strength U
shall be at least equal to 1 .5D + 1 .$L + 1 .$H but where D or L reduce the
effect of H, the corresponding coefficients shall be taken as 0.90 for D and
zero for L.
EXCEPTION: Where lateral -earth pressures have been estimated by "at rest" soil
theory instead of "active" or "Rankine" soil theory and such pressures are equal
to or exceed an equivalent fluid pressure of 50 p.c.f. , 1 .5H may be used instead
of 1 .8 H as required in the above paragraph. This is allowed only on the basis
of an investigation, performed by qualified persons, conforming to the require-
ments of Section 2905 for foundation investigations. For lateral pressures from
liquids F, the provisions of the paragraph preceding the exception shall apply,
except that 1 .5F shall be substituted for� 1 .8H. The vertical pressure of liquids
shall be considered as dead load, with due regard to variation in liquid depth.
Impact effects if any, shall be included with the live load L.
Where the structural effects of differential settlement, creep, shrinkage,
or temperature change may be significant, they shall be included with the dead
load D and the strength U shall be at least equal to 0.75 (1 •50 + 1 .8H) .
Section 8. 14 Section 2611 (q) of the Uniform Building Code is hereby amended
to read as follows:
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Section 2611 (q) Special Provisions for Walls. Design for horizontal
shear forces in the plane of the wall shall be in accordance with this Section.
The nominal shear stress, V�, shall be computed by
�� - ��� . . . . . . . . . . . . . . . . . . (I1-31 )
hd
where d shall be taken equal to 0.81 . A larger value of d, equal to the
distance from the extreme compression fiber to the center of force of all
reinforcement in tension, may be used when determined by a strain compa[i-
bility analysis.
The shear stress carried by the concrete, V�, shall not be taken greater
than the lesser value computed from
�� = 3.3 f�'� + N �� . . . . . . . . . . . {11-32)
���h
N „
and V� = 0.6 f'� + lw �25 f' � + 0.2 iwh . . (11-33)
M�� _�W
V��
2
where N is negative for tension.
EXCEPTION: N when in compression shall be taken as zero for buildings located
in Seismic Zone No. 3 when considering earthquake loads.
However, v may be taken as 2 f' if N„ is compression or Section 2611 (c) 4
may be app�ied if N�� is tension.�
When v�� is less than v�/Z� reinforcement shall be provided in accordance with
Section 2614 except that in Seismic Zone No. 3 the minimum required ratio for
and P�� i s 0.0025.
When v�� exceeds v��2� Wall reinforcemen[ for resisting shear shall conform to
the following:
The area of horizontal shear reinforcement shall be not less than that
computed by Formula (I1 -13) • The ratio•.P��� of horizontal shear reinforcement
area to the gross concrete area of vertical sections shall be at least 0.0025•
The spacing of horizontal shear reinforcement shall not exceed 1 /5,3h, nor
18 inches. W
The ratio of vertical shear reinforcement area to gross concrete area of
horizontal section shall be not less than 0.0025 nor less than the value of
P„ required by the preceding paragraph. The spacin9 of vertical shear rein-
forcement shall not exceed lW/3,3H, nor 18 inches .
Horizontal wall elements required by design to be part of the lateral
force system shall be designed for induced vertical shear forces in the plane
of the wall and, in addition, shall meet all other requiremen[s for beams when
carrying vertical loads as a beam. The shear stress carried by the concrete
�c skall be as given by Section 2611 (e) . The ratio Pn of vertical shear
reinforcement area to the gross concrete area of horizontal sections shall be
at least 0.0025• The ratio of horizontal reinforcement Ph shall be not less
than 0.0025 nor less than the required value of pn. The spacing of vertical
and horizontal reinforcement shall not exceed d/3, 3h nor 18 inches. Where
torsion exists, the requirements of Sections 2611 (h) and (i) shall be satisfied.
The total design shear stress, Vu, at any section shali not exceed 10 f'c
except that, when considering earthquake loads, the average horizontal shear
stress for all wall piers sharing a common lateral force component shall not
exceed 8 V� . The average horizontal shear stress shall be computed from
Formula (11-�1 ) using the sum of all wall pier hd areas for the hd term of the
Formula.
Design for shear forces perpendicular to the face of the wall shall be
in accordance with provisions for slabs in Section 2611 (k) .
Section 8.43. Section 3802(b) of the Uniform Building Code is hereby
amended by adding subsection 1 to read as follows:
In every story, basement or cellar of all buildings, except Group I
Occupancies, when floor area exceeds 1 ,500 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, basement
or cellar on at least one side of the building. Openings shall have a minimum
dimension of not less than 30 inches. Such openings shall be located within
effective range of the Fire Department's fire suppression and/or rescue equip-
ment; shall be maintained readily accessible to the fire Department; and shall
not be obstructed in a manner that fire fighting or rescue cannot be accomplished
from the exterior.
If any portion of a story, basement or cellar is located more than 75 feet
from any openings required in this Section, the story, basement or cellar shall
be provided with an approved automatic fire-extinguishing system.
Section 8.46. Section 3802(b) of the Uniform Building Code is hereby —
amended by adding subsections 12, 13 and 14 to read as follows:
Section 3802(b) Subsection 12. In every building, regardless of occupancy,
group or type of construction, when such building is more than forty (40) feet
or four (4) stories or more in height. For purposes of this Section, regardless
of Section 1102, basements, cellars and garages shall be considered as stories.
Section 3802(b) Subsection 13• In all occupancies when the floor area,
regardless of area separation walls, exceeds the basic allowable floor area
of Table 5-C, Uniform Building Code, 1973 Edition; however, the respective
, increases for area and height specified in Sections 5o6 and 507 shall be
permitted.
Section 3802(b) Subsection 14. In all buildings accommodating high piled
combustible storage, fire protection requirements shall comply with Article 35,
Uniform fire Code, 1973 Edition.
Section 8.51 • Sec[ion 3803 of the Uniform Building Code is hereby amended
by adding subsection (e) to read as follows:
Dry standpipes shall be omitted in buildings equipped throughout with
an approved automatic sprinkler system; however, hose connections for fire
department use, as outlined in Section 3-7.8, National Fire Protection Associ-
ation Pamphlet No. 13, 1973, shall be provided in all required stair enclosures.
No point within the building shall be more than 130 feet travel distance from a
required hose connection. The static pressure at hose connections shall not
exceed 150 pounds per square inch.
Section 8.52. Section 3805 of the Uniform Building Code is hereby amended
by adding subsection (e) to read as follows:
Separate standpipes may be omitted in buildings equipped with an approved
automatic sprinkler system; however, hose connections for fire department use
as outlined in Section 3-7•8, National Fire Protection Association Pamphlet No.
13, 1973, shall be provided in all required stair enclosures. No point within
the building shall be rtrore than 130 feet travel distance from a required hose
connection. The static pressure at hose connections shall not exceed 150 pounds
per square inch.
Section 8.53• Section 4901 of the appendix of the Uniform Building Code
is hereby amended to read as follows:
Seciion 4901 . Patio Covers are one-story roof structures which shall not
exceed 12 feet in height.
Patio Covers shall be open on one or more sides with minimum soffit height
of 6' 8", measured from patio floor. Where two sides are open, such open sides
may be partially closed by solid material which are not more than 30" in height
�bove patio floor. �_
Patio Covers may be detached or attached to other buildings as accessories
to Group J and I or to single dwelling units in Group H Occupancies.
Patio Covers shall be used only for recreational , outdoor living purposes and
not as carports, garages , storage rooms, or habitable rooms.
EXCEPTION: 1 . Open sides may be closed with insect screening and plastic.
EXCEPTION: 2. Open sides may be closed with solid material , except an area
equal to 65$ of the long side of the patio.
In computing the 65$ rule, only the screen and plastic area can be used. The
computed area may star[ no higher than 30" from patio floor.
Section 8.55• Section 6002 of the Uniform Building Code is hereby amended
to read as follows:
Section 6002. The U.B.C. Standards which are referred to in various parts
of this Code shall be the Uniform Building Code Standards, 1973 Edition, and are
hereby declared to be a part of this Code.
Section 8.56. Section 1504 of the Uniform Building Code is hereby amended
to read as follows:
Section 1504. SPECIAL HAZARDS. Chimneys and heating apparatus shall conform
to the requirements of Chapter 37 and the Mechanical Code.
Under no circumstances shall a private garage have any opening into a room
used for sleeping purposes.
Flammable liquids shall not be stored, handled , or used in Group J Occupancies
unless such storage or handling shall comply with U.B.C. Standard No. 9-7•
Private garages which are constructed in conjunction with any Group H or I
Occupancy and which have openings into such building shall be equipped with fixed
louvered or screened openings or exhaust ventilation to the outside with exhaust
openings located within six inches (6") of the floor. The clear area of the
louvered openings into the exhaust ducts shall be not less than sixty square inches
(60 sq. in. ) per car stored in such private garage.
This ordinance shall take effect and be in force on the thirty-first day from �
and after its passage and approval.
Presented by Approved as to form by
����� �/
en Grady, Director f Building_ and George D. Lindberg, City Attorney
�sing
�
ADOPTED AND APPROVED BY THE CITY COUNCIL OF THE CITY
OF CHULA VISTA, CALIFORNIA, this lOth day of September ,
1974 , by the fcllowing vote, to-wit :
AYES: C�:nc-%Zmer, Hobel, Hamilton, Hyde, Egdahl, Scott
NAYES : C:n.[r.e:Zmen None
ABSENT: Co��nc�:Gnen None
ABSTAIN: Ccunc2lmer None
_ �,'/.�Z��• ���-
Mayor of the Cti�� of CYeul ✓is�
ATTEST r �
City erk
STATE OF CALIFORNIA )
COUNTY OF SAN. DZEGO ) ss.
CITY OF CHULA VISTA )
I, JENNIE M, FULASZ, Citzj• Cler•k of ihe City cf Chk:w V<::¢, �¢7�forn�c,
DO HEREbP CEx"IIcY th¢t che abcve and fcregoing is a fuZl, ir�e �,d cc��re^� eopy of
and that ihe �crr,� h.�s not beEr: crnended or
rereaZed,
DAmgD:
City Clerk
!SEAL1
CC-660
;1� �