HomeMy WebLinkAbout2002-11-12 Ordinance 4769· -",
ORDINANCE NO. 4769
ORDINANCE OF THE COUNCIL OF THE CITY OF PALO ALTO
ADOPTING PARTS 2, 4 AND 10 OF THE 2001 CALIFORNIA
BUILDING STANDARDS CODE (1997 UNIFORM BUILDING
CODE, 2000 UNIFORM MECHANICAL CODE AND CALIFORNIA
HISTORICAL BUILDING CODE, RESPECTIVELY) AND THE
2001 CALIFORNIA CODE FOR BUILDING CONSERVATIONj
AMENDING CHAPTER 16.04 OF THE PALO ALTO MUNICIPAL
CODEj AND MAKING CERTAIN FINDINGS WITH
RESPECT THERETO
The Council of the City of Palo Alto does ORDAIN as
follows:
SECTION 1. Chapter 16.04 of the Palo Alto Municipal Code
is hereby amended in its entirety to read as follows:
CHAPTER 16.04
BUILDING CODE
16.04.010 The 2001 California Building Code adopted.
The "California Building Code", being Part 2 of the 2001
California Building Standards Code, Title 24 of the California Code
of Regulations, is adopted and by reference made a part of this
code with the same force and effect as though set out herein in
full. The California Building Code consists of the "Uniform
Building Code, 1997 Edition," Volumes 1, 2 and 3, promulgated by
the International Conference of Building Officials, 5360 South
Workman Mill Road, Whittier, California, 90601-2298, which is
dedicated to the development of better building construction and
greater safety to the public by uniformity in building laws, as
modified by the California Building Standards Commission. A copy
of the California Building Code is on file and open to public
inspection in the office of the building official.
16.04.20 The 2001 California Mechanical Code adopted.
rrhe "California Mechanical Code", being Part 4 of the 2001
California Building Standards Code, Title 24 of the California Code
of Regulations, is adopted and by reference made a part of this
code with the same force and effect as though set out herein in
full. The California Mechanical Code consists of the "Uniform
Mechanical Code, 2000 Edition," promulgated by the International
Association of Plumbing and Mechanical Officials, 20001 Walnut
Drive South, Walnut, California 91789-2825, which regulates and
provides complete requirements for the installation and maintenance
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021203 sm 0053118
of heating, ventilating, comfort cooling and refrigeration systems,
as modified by the California Building Standards Commission. A
copy of the California Mechanical Code is on file and open to
public inspection in the office of the building official.
16.04.030 Section 102 deleted.
Section 102 of the California Building Code is deleted.
Wherever the term "building inspector" is used in this
code, it shall mean the "building official."
16.04.040 Section 104.2 amended--Powers and duties of
building official.
read:
Section 104.2 of the California Building Code is amended to
"104.2 Powers and Duties of Building Official.
104.2.1 General. The building official shall have
the power and duty to enforce all of the provisions of this
code, the California Building Standards Code, the State
Housing Code, and the zoning ordinance and any ordinance
regulating advertising structures or signs, and such other
ordinances as may be adopted from time to time in which
further duties are specifically assigned to the building
official. Whenever the term "building inspector" is used
in this code, it shall mean the "building official. II
104.2.2 Reports and records. The building official
shall submit a report to the city manager not less than
once a year, covering the work done by him or her during
the preceding period.
The building official shall keep a permanent, accurate
account of all fees and other monies collected and received
under this code, the names of the persons upon whose
account the same were paid, the date and amount thereof,
together with the location of the building or premises to
which they relate.
104.2.3 Right of Entry. Whenever necessary to make
inspection to enforce any of the provisions of this code,
or whenever the building official or authorized representa-
tive has reasonable cause to believe that there exists in
any building or upon any premises any condition or code
violation which makes such building or premises unsafe,
dangerous or hazardous, the building official or authorized
representative may enter such building or premises at all
reasonable times to inspect the same or to perform any duty
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\.
imposed upon the building official by this code, provided
that if such building or premises be occupied, he or she
shall first present proper credentials and request entry;
and if such building or premises be unoccupied, he or she
shall first make a reasonable effort to locate the owner or
other persons having charge or control of the building or
premises and request entry. If such entry is refused, the
building official or authorized representative shall have
recourse to every remedy provided by law to secure entry.
When the building official or authorized representa-
tive shall have first obtained a proper inspection warrant
or other remedy provided by law to secure entry, no owner
or occupant or any other persons having charge, care or
control of any building or premises shall fail, after
proper request is made as herein provided, to promptly
permit entry therein by the building official or authorized
representative for the purpose of inspection and examina-
tion pursuant to this code.
104.2.4 Stop order. Whenever any work is being done
contrary to the provisions of this code, the building
official may order the work stopped by notice in writing
served on any persons engaged in the doing or causing such
work to be done, and any such persons shall forthwith stop
such work until authorized by the building official to
proceed with the work.
104.2.5 Occupancy violations. Whenever any struc-
ture is being used contrary to the provisions of this code
or any other city ordinance, the building official may
order such use discontinued and the structure, or portion
thereof, vacated by notice served on any person causing
such use to be continued. Such person shall discontinue
the use within ten (10) days after receipt of such notice
or make the structure, or portion thereof, comply with the
requirements of this code or applicable ordinance; pro-
vided, however, that in the event of an unsafe building,
Chapter 16.40 of the Palo Alto Municipal Code shall apply.
104.2.6 Administrative immunity from liability. The
building official, or any officer, agent or employee of the
city charged with the enforcement of this code, acting in
good faith and without malice for the city in the discharge
of required duties, shall not thereby be rendered person-
ally liable for damages that may accrue to persons or
property as a result of an act or by reason of an act or
omission in the discharge of such duties.
[104.2.7 No change]
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[104.2.8 No change]
[104.2.9 No change]
104.2.10 Cooperation of other officials. The
building official may request, and shall receive so far as
may be necessary in the discharge of his or her duties, the
assistance and cooperation of other officials of the city.
104.2.11 Authority to require exposure of work.
Whenever any work, in which called inspections are required
by this code, is covered or concealed by additional work
without first having been inspected, the building official
may require, by written notice, such work to be exposed for
examination. The work of exposing and recovering shall not
entail expense to the city.
104.2.12 Authority to stop use or occupancy.
Whenever any portion of a building is loaded in excess of
the loading for which it was constructed or whenever it
houses an occupancy other than that for which it was
constructed or whenever there is an encroachment upon any
required court or yard, the building official may order, by
written notice, that such violation be discontinued.
The written notice shall state the nature of the violations
and shall fix the time for the abatement thereof. If the
violations have not been abated by the expiration of the fixed
time, the certificate of occupancy shall thereupon be null and
void. "
16.04.050 Section 105 deleted.
Section 105 of the California Building Code is deleted.
16.04.060 Violations--Penalties.
It is unlawful for any person, firm, or corporation to
erect, construct, enlarge, alter, repair, move, improve, remove,
convert or demolish, equip, use, or occupy or maintain any building
or structure in the city, or cause or permit the same to be done,
contrary to or in violation of any of the provisions of this
chapter.
Any person, firm, or corporation violating any of the
provisions of this chapter is guilty of a misdemeanor, and such
person is guilty of a separate offense for each and every day or
portion thereof during which any violation of any of the provisions
of this building code is committed, continued, or permitted, and
upon conviction of any such violation such person shall be punished
as provided in subsection (a) of Section 1.08.010 of this code.
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"
. 16.04.070 Enforcement--Citation authority.
The employee positions designated in this section may
enforce the prov1sions of this chapter by the 'issuance of cita-
tions. Persons employed in such posi tions are authorized to
exercise the authority provided in Penal Code sectiori 836.5 and are
authorized to issue citations for violations of this chapter. The
designated employeepositions are: (1) chief building6ffiCiali (2)
assistant building officia1i(3) building inspection supervisori
and (4) code enforcement officer.
16.04.080 Recordation of building code violations.
When the building official determines that a violation of
this chapter or chapters 16.08 or 16.16 of this code has occurred,
he or she may record a notice of pendency of code violation with
the Office of the County Recorder stating the address and owner of
the property involved. When the violation has been corrected, the
building off,icial shall is/?ue and record a release of the notice of
pendency of code violation. '
16.04.090 Section 106.2-2 amended.
Section 106.2-2 of the California Building Code is amended
to read:
"2. Fences. II
'~'ii<'ii 16 ~ 04 0 100 Secti.on 106" 4. n 4 amended--Expirat.ion.
"106.4.4 Expiration. Ever'ypermit issued by the
building official under the provisions of this code shall
expire by limitation and become null and void if the
building or work a'uthorizedby such permit is not commenced
within 180 days from the date of'such permit, or if the
building or work authorized by such permit is suspended or
abandoned at any t,ime after the work is commenced for a
p~ridd of 180 days.' Before such work'canbe recommenced,
a new permit shall be first obtained to do so, and the fee
therefor shall be one half the amount required for a new
permit. for such work/provided no changes have been made or
will be made in the original 'plans and specifications for
such work; and provided fUrther that such suspension or
abandonment has not 'exceeded 'Qne year. In order to renew
action on a permit after one year/the permittee shall pay
'a new full permi.t fee.
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"
. f,'
, AnY" J?~i~:Ltfee', hol.d~~g Ciplinail?i red' 'permit: may 'apply
for all; extensi;oh'of' the't,imewithiri'which:wo:rk may commence
under that' pe:0nit when 'thepe;rmit:t~e:is !unable'to'commence
work within the "time reqUi-recl' py thissecti6nfbr" good' and
satisfactory reasons .. 'rhe bU,iid'irtg oftici'atmay extend the
time, for 'action by:"tlie peri:nitt'ee: for a period not exceeding
18~(i'da.:y~'; on wr'it:ten ,':requesf::by;'Ulepermittee showing that
'circutnst~nces'heyon(i"t:he" 'corttrolof the 'permittee have
preventeda'cti'o:n:' from being taken. No permit shall be
extended more than once.
For the purpose of this section, failure to progress
'" ,a proj ect to the next level of required inspection shall be
deemed to be abandonment of the project."
16~04.110 'Section 106.4.6 added--Demolition permits.
s~~~ct:ion id'6':'4";'6; f~: ;~d~eat6": g1iecaitf6:irif~i' Building Code
to read:, .:~ ': '. -.. ~ .-.-.; ."',"
read:
',',
"106.4.6 Demolition Permits. In addition to other
requirements of.',law" ~very per~onsee!cing,a demolition
permit:fo'r a un~t:, :us~d'for .. ,:r;e~'id~p.tiaI' remtalpurposes
shall furnish an affidavit' or deciaration under pen'alty of
perjury that the unit proposed to be demolished Is vacant,
or that notice to vacate' has been given to each tenant
lawfully in possession thereof as required by law or by the
terms of such tenancy.
No work or demolition shall begin upon any portion of
such a unit until each and every portion has been vacated
by all tenants lawfully in possession thereof on the date
of issuance of a demolition permit I or who have become
lawful tenants subsequent thereto."
16.04.120 Section 109 amended--Certificate of occupancy.
Section 109 of the California Building Code is amended to
"109. Certificate of Occupancy.
109.1 Certificate Required. In order to safeguard
life and limb, health, property and public welfare,
every building structure or portion thereof shall conform
to the construction requirements for the occupancy to be
housed therein or for the use to which the building
structure, or portion thereof is to be put, as set forth in
this code.
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No building or structure or portion thereof con-
structed or altered shall be used or occupied until a
certificate of occupancy has been issued therefor.
Exception: No structure l of Group R Division 3 or
Group U 1 or a structure, the architecture of which inhibits
occupancy 1 shall require a certificate of occupancy.
109.2 Change of Occupancy or Tenancy. Each change of
occupancy 1 official name or tenancy of any building 1
structure or portion thereof, shall require a new certifi-
cate of occupancy, whether or not any alterations to the
building are required by this code.
If a portion of any building does not conform to the
requirements of this code for a proposed occupancy, that
portion shall be made to conform. The building official
may issue a new certificate of occupancy without stating
therein that all of the requirements of the code have been
made and without requiring compliance with all such
requirements if he or she finds that the change in occu-
pancy or tenancy will result in no increased hazard to life
or limb l health, property or public welfare.
When application is made for such certificate of
occupancy, the building official and fire chief shall cause
an inspection of the building to be made. The inspector
shall advise the applicant of those alterations necessary,
or if none is necessary, shall make a report of compliance
to the building official.
Before any application for such certificate of
occupancy is accepted, a fee as set forth in the municipal
fee schedule shall be paid by the applicant to cover the
cost to the city of the inspection of the building for
which a change of occupancy or tenancy is required. Such
fee shall be in addition to the regular building permit fee
required by this code. .
109.3 Content of Certificate. Each certificate shall
contain the following:
1. The building permit number.
2. The address of the building.
3 . The name and address of the owner or
lessee.
4. A description of that portion of the
building for which the certificate is issued.
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021203 8m 0053118
5. The use and occupancy for which the
certificate is issued.
109.4 Temporary Certificates. Notwi thstanding the
provisions of subsection 109.4 of this section, if the
building official after conferring with the fire chief
finds that no substantial hazard will result from occupancy
of any building, or portion thereof, before the same is
completed and satisfactory evidence is submitted that the
work could not have been completed prior to the time such
occupancy is desired because of its magnitude or because of
unusual construction difficulties, the building official
may issue a temporary certificate of occupancy for any
building or portion thereof. Such temporary certificate of
occupancy shall be valid for a period not to exceed six (6)
months. After the expiration of a temporary certificate of
occupancy, the building, structure or portion thereof shall
require a certificate of occupancy in accordance with other
provisions of this section.
Upon payment of a fee as set forth in the municipal
fee schedule, duplicates of the certificate or temporary
certificate may be secured by the owner, architect,
engineer, contractor, permittee or tenant.
109.5 Posting of Certificate of Occupancy. In Groups
A, B, E, F, H, I, M, R-1 and S occupancies, the certifi-
cates of occupancy shall be posted in a conspicuous,
readily accessible place in the portion of such building
being used for such occupancy.
109.7 Compliance. No person shall use or occupy any
building or structure or any portion thereof, for which a
certificate of occupancy is required by this Section 109
without first obtaining, posting, and keeping posted, a
proper certificate of occupancy as required by this
Section. "
16.04.130 Section 207 amended--Definition of family.
The definition of "Family" in Section 207 of the California
Building Code is amended to read:
"207. Family.
meaning ascribed in
Municipal Code."
The term "family" shall have the
section 18.04.030 of the Palo Alto
16.04.140 Section 904.2.1.1 added.
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Section 904.2.1.1 is added to the California Building Code
to read:
"904.2.1.1 Special Provisions. In any building or
group of buildings where, in the judgment of the fire
chief, such building or group of buildings due to size,
height, type of construction, location on property,
contents or occupancy classification would exceed or
severely tax the capabilities of the local fire department
to perform a reasonable level of rescue and fire suppres-
sion operations, fire flows required for each building will
be determined utilizing the California Fire Code Appendix
III-A as modified in Section 15.04.365 of the Palo Alto
Municipal Code. Regardless of area or occupancy separation
walls, when more than 1000 GPM fire flow is required, the
building shall be sprinklered. Such buildings shall
include, but are not limited to:
1. All buildings more than five (5) stories or
fifty feet (50') in height.
2. Buildings where limited access for fire
apparatus does not permit mobile unit
operation of ladder companies to within
fifteen feet (IS') of openings in stories
as required in Section 904.2.2-1.
3. Buildings where access for re apparatus
does not permit use of pump and hose compa-
nies to reach all sides of the bui lding
without hand-laying more than 150 feet of
fire hose from a maximum of two (2) mobile
pumping units.
904.2.1.1.1 Buildings including Group R, Division 3
and Group U occupancy constructed in the hazardous fire
area west of the Junipero Serra Freeway shall be fire
sprinklered and provided with exterior wet standpipes
approved by the fire chief. Such sprinklers may be
connected to domestic water supply providing the piping is
of approved sizing and sufficient coverage of the area is
approved and an approved accessible shut-off is provided
for each room or area. Exterior standpipes shall deliver
fire flows derived by the following formula: GPM ~ square
footage of floor area x 8 (ceiling height) . 100 x .5.
904.2.1.1. 2 If a fire sprinkler system is not
required for purposes other than this section, the area
increases specified in Section 505.3, or the height and
story increases specified in Section 506, or the fire-
resistive substitution in Section 508 may be permitted.
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; ,
904.2.1.1.3 Additions to existing buildings. This
section shall apply to all new construction including
additions.
If the entire building area exceeds the area
permitted in Section 904.2.1 through
904.2.9, the entire building shall be
sprinklered.
Exception: The fire flow limitation of 1000 GPM
contained in Section 904.2.10 shall not apply to single
family or duplex structures not located in the hazardous
fire area."
16.04.150 Section 1503.1 added--Construction of buildings
in the foothills area.
read:
read:
Number
of
Stories
1 & 2
3
Section 1503.1 is added to the California Building Code to
"1503.1 Construction of Buildings in Foothills Area.
The Council of the City of Palo Alto finds and declares
that the area within the City of Palo Alto to the west of
Junipero Serra Freeway is a hazardous fire area and that it
is, therefore, necessary to establish special minimum fire-
resistive requirements in this area for the protection of
life and property. In addition to the special requirements
of Section 904.2.1.1, all roofs shall be non-combustible or
Class A or B Fire Retardant as specified in Section 1504.1
or 1504.2."
16.04.160 Table 18-1-C amended.
Table 18-l-C of the California Building Code is amended to
"TABLE 18-1-C
FOUNDATIONS FOR STUD BEARING WALLS
MINIMUM REQUIREMENTS
Thickness of Width of
Foundation Wall Footing
( Inches) ( Inches)
Thickness
of Footing
(Inches)
Depth of Foundation
Below Natural Surface
of Ground and Finish
Grade (Inches)
Good Soil Adobe
U occupancy
8
8
8
14
18
12
8
8
12
20
30
12
20
30
12
10
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\'
structures
read:
All foundations as required in the above Table shall
be continuous and have a minimum of three #4 bars of
reinforcing steel, except for one story, detached accessory
buildings of Group U occupancy where one bar is required."
16.04.170 Section 3403.6 added.
Section 3403.6 is added to the California Building Code to
"3403.6 Additions, alterations and repairs: More
than fifty percent (50%). When additions, alterations, or repairs
within any twelve (12) month period exceed fifty percent (50%) of
the value of an existing building or structure designed and
constructed prior to the 1976 edition of the Uniform Building Code,
such building or structure shall be made to conform to the
requirements of section 1626 for new buildings or structures.
Value shall be determined from the cost per square foot table in
the most current issue of Building Standards, published by the
International Conference of Building Officials. II
Exemption -Group Rand U Occupancies
16.04.180 Section 3403.7 added.
Section 3403.7 is added to the California Building Code to
read:
"3403.7 In existing buildings, when a permit is
issued for alterations or repairs, the existing suspended ceiling
system within the area of the alterations or repairs shall comply
with the lateral design requirements of Uniform Building Code
Standard 25-2, Part III."
16.04.190 Appendix Chapter 34, Division ZZZ added.
Appendix Chapter 34, Division III of the Uniform Building
Code is added.
16.04.200 Appendix Chapter 4 Section 421.1-5 deleted.
Section 421.1-5 of Appendix Chapter 4 of the California
Building Code is deleted.
16.04.210 Appendix Chapter 4 Section 421.3 added.
Section 421.3 is added to Appendix Chapter 4 of the
California Building Code to read:
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"421.3 Covers. Spas or hot tubs equipped with a
lockable cover and swimming pools located on sites of one
acre or larger incorporating automatic, key operated covers
are exempt from the requirements of this section. All
covers must comply with applicable ASTM standards."
16.04.215 Adoption of Unifor.m Building Code, Volume 2.
The rules, regulations and requirements published by the
International Conference of Building Officials under the title
1997 Uniform Building Code Volume 2 II and adopted as the 2001
California Building Code Volume 2" is adopted as and for the rules,
regulations and standards within this city as to all matters
therein contained except as amended as follows:
a} Section 1612.2.1 amended -General.
Section 1612.2.1 is amended to read as follows:
1612.2.1 Basic load combinations. Where Load and
Resistance Factor Design (Strength Design) is used, structures and
all portions thereof shall resist the most critical effects from
the following combinations of factored loads:
WHERE:
1.4D
1. 2D + 1. 6L + 0.5 (L. or S)
(12-1)
(12-2)
(12-3)
(12-4)
(12-5)
1.2D + 1.6 (L. or S) + (f 1 L or 0.8 W)
1.2D + 1.3W + {f 1 L + 0.5 (Lr or S)
1. 2D + 1. OE + (f1 L + f2 S)
o . 9D tf (1. 0 • Ell or 1. 3W) (12-6)
=
=
=
1.0 for floors in places of public
assembly, for live loads in excess of 100
psf (4. 9 kN/m2
), and for garage live
load.
0.5 for other live loads.
0.7 for roof configurations (such as saw
tooth) that do not shed snow off the
structure.
= 0.2 for other roof configurations.
EXCEPTIONS: 1. Factored load combinations for
concrete per Section 1909.2 where load combinations
do not include seismic forces.
2. Where other factored load combinations are
specifically required by the provisions of this
code.
(b)
Combinations.
Section 1612.3.1 amended B Basic Load
The last sentence in section 1612.3.1 is amended to read
as follows:
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,I
No increase in allowable stresses shall be used with
these load combinations except as specifically permitted
elsewhere in this code and the duration of lqad increase
permitted in Division III of Chapter 23.
(c) Section 1612.3.2 amended B Alternate Basic Load
Combinations.
The last sentence of the first paragraph of the section
is amended to read:
When using these alternate basic load combinations, a
one-third increase shall be permitted in allowable
stresses for all combinations including W or E but not
concurrent with the duration of load increase permitted
in Division III of Chapter 23.
(d) Section 1629.4.2 amended B Seismic Zone 4 near-
source Factor
Section 1629.4.2is amended to read as follows:
1629.4.2. Seismic Zone 4 near-source factor. In Seismic
Zone 4, each site shall be assigned a near-source factor
in accordance with Table 16--S and the Seismic Source Type
set forth in Table 16-U. The value of N" used in
determining C" need not exceed 1.1 for structures
complying with all the following conditions:
1. The soil profile type is SA' Sa' Se or SD'
2. • = 1.0.
3. Except in single-story structures ,Group R,
Division 3 and Group U, Division 1 'Occupancies, moment
frame systems designated as part of the lateral-force-
resisting system shall be special moment-resisting
frames.
4. The provisions in Sections 9.6a and 9.6b of AISC
-Seismic Part 1 shall not apply, except for columns in
one-story buildings or columns at the top story of
multistory buildings.
5. None of the following structural irregularities
is present: Type I, 4 or 5 of Table 16-L, and Type 1 or
4 of Table 16-M.
(e) Table 16-N amended
Table 16-N is amended to read as follows:
TABLE 16-lf B STRUCTURAL SYSTEMS 1
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,"
BASIC STRUCTURAL.
SYSTEM
1. Bearing wall
system
2. Building frame
system
3. Moment-resisting
frame system
4. Dual systems
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LATERAL -FORCE-RESISTING
. SYSTEM DESCRIPTION·
1. Light-framed walls with
shear panels
a. wood structural panels
for structures three
stories or less
b. All other light-framed
walls ...
2. Shear walls
a. Concrete
b. Masonry
3. Light steel-·framed bearing
walls with tension-only
bracing
4.Braced frames where bracing
. carries gravity load
a. ·Steel
b. Concrete'
c . HeaVy timbers
1. Steel eccentrically braced
frame (EBF)
2. Light-framed walls with
shear panels
a. Wood structural panel
wails for structures
three stories or less
b. All other light-framed
walls
3. Shear walls
a. Concrete
b. Masonry
4. Ordinary braced frames
a. Steel6
b. Concrete'
c. Heavy timber
5. Special concentrically
braced frames
a. Steel
1. Special moment-resisting
frame (SMRF)
a. Steel
b. Concrete'
2. Masonry moment-resisting
wall frame (MMRWF)
3. Intermediate moment-
resisting frame (IMRF)
a. Steel6
b. Concrete'
4. Ordinary moment-resisting
frame (OMRF)
a. Steel6
b. concrete'
5. Special truss moment frames
of steel (STMF)
1. Shear walls
a. Concrete with SMRF
b. Concrete with concrete
IMRF'
c. Masonry wi th SMRF
d. Masonry wi th IMRF'
14
R
5.5
4.5
4.5
4.5
2.8
4.4
2.8
2.8
. •
2.8
2.8
2.8
2.8
2.2
2.2
2.2
2.2
7.0 2.8
6.5 2.8
5.0 2.8
5.5 2.8
5.5 2.8
5.6 2.2
5.6 2.2
5.6 2.2
6.4 2.2
8.5 2.8
8.5 2.8
6.5 2.8
4.5 2.8
5.5 2.8
3.5 2.8
3.5 2.8
6.5 2.8
8,5
6.5
5.5
4.2
6.0
2.8
2.8
2.8
2.8
2.8
HEIGHT LIMIT
FOR SEISMIC
ZONES 3 AND 4
(feet)
x 304.8 form
rom
N.L.
X'
X'
X'
65
65
160
160
65
160
X'
65
.240
65
65
240
160
356
X'
65
240
N.L.
N.L.
160
35"
356
X'
240
,
e. Masonry wi th masonry 160
MMRWF 8.5 2.8
2. Steel EBF N.L.
a, With steel SMRF 7.5 2.8
3. special concentrically N.L.
braced frames
a. Steel with steel SMRF
5. Cantilevered 1. Cantilevered column elements 2.2 2.0 357
column building
systems
6. Shear wall-frame 1. Concrete" 5.5 2.8 160
interaction systems
7. Undefined systems See Sections 1629.6.7 and B B B
1629.9.2
N.L.B no limit
1 See Section 1630.4 for combination of structural systems.
2 Basic structural systems are defined in Section 1629.6.
3 Prohibited in Seismic Zones 3 and 4.
4 Includes precast concrete conforming to Section 1921.2.7.
5 Prohibited in Seismic Zones 3 and 4, except as permi t ted in
Section 1634.2.
6 In Seismic Zones 3 and 4 steel IMRF=s, OMRF=s and steel ordinary
braced frames are permitted as follows:
6.1Structures using Steel IMRF=s and OMRF=s are permitted to a height
of 35 ft. where the total dead weight of the floors, walls and
roof do not exceed 35 psf. or for single-story buildings
where the moment joints of field connections are constructed
of bolted end plates and the dead load of the roof does not
exceed 15 psf. the height is permitted to be increased to 60
ft.
6.2 Steel ordinary braced frames are permitted in penthouse structures
and in other one-story buildings or structures where the total
dead weight of the roof does not exceed 15 psf, and the
height of the building or structure does not exceed 60 feet.
7 Total height of the building including cantilevered columns.
8 Prohibited in Seismic Zones 2A, 2B, 3 and 4. See Section
1633.2.7.
(f) Section 1630.2.3.5 renumbered to Section
1630.2.3.4
Section 1630.2.3.4 is renumbered as Section 1630.2.3.5.
(g) Section 1630.2.3.4 added B New section on
Horizontal Distribution.
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A new Section 1630.2.3.4 is added to read:
1630.2.3.4 Horizontal Distribution. Diaphragms
constructed of un topped steel decking or wood structural
panels or similar light-frame construction are permitted
to be considered as flexible.
15
read:
Moments.
021203 sm 0053118
(h) Section 1630.4.2 amended Bvertical Combinations.
A sentence is added to the end of the last paragraph to
This ratio shall not be taken less than 1.0
(i) Section 1630.7 amended B Horizontal Torsional
Section 1630.7 is amended to read as follows:
1630.7 Horizontal Torsional MOments. Provisions shall be
made for the increased shears resulting from horizontal
torsion where diaphragms are not flexible. The most
severe load combination for each element shall be
considered for design.
The torsional design moment at a given story shall be the
moment resulting from eccentricities between applied
design lateral forces at levels above that story and the
vertical-resisting elements in that story plus an
accidental torsion.
The accidental torsional moment shall be determined by
assuming the mass is displaced as required by Section
1630.6.
Where torsional irregularity exists, as defined in Table
16-M, the effects shall be accounted for by increasing
the accidental torsion at each level by an amplification
factor, Ax ' determined from the following formula:
(30-16)
WHERE:
_svg = the average of the story drift_at the extreme
points of the structure at Level x.
_~ = the maximum displacement story drift_at Level x.
The value of Ax need not exceed 3.0.
(j) Section 1630.8.2.1 amended B General.
Section 1630.8.2.1 is amended to read as follows:
1630.8.2.1 General. Where any portion of the lateral-
load-resisting system is discontinuous, such as for
vertical irregularity Type 4 in Table 16-L or plan
irregularity Type 4 in Table 16-M, columns, beams,
trusses or slabs_supporting such discontinuous systems
shall have the design strength to resist the combination
loads resulting from the special seismic load
combinations of Section 1612.4. The Connections of such
16
discontinued elements to the supporting members shall be
adequate to transmit the forces for which the
discontinuous elements were required to be designed.
EXCEPTIONS: 1. The quanti ty Em in Section
1612.4 need not exceed the maximum force that can
be transferred to the element by the lateral-force-
resisting system.
2. Concrete slabs supporting light-frame wood
shear wall systems or light-frame steel and wood
structural panel shear wall systems.
For Allowable Stress Design, the design strength
may be determined using an allowable stress increase of
1.7 and a resistance factor of 1.0. This increase shall
not be combined with the one-third stress increase
permitted by Section 1612.3, but may be combined with the
duration of load increase permitted in Chapter 23,
Division III.
(k) Section 1630.8.2
Requirements in Seismic Zones 3 and 4.
amended B Detailing
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Section 1630.8.2.2 is amended to read as follows:
1630.8.2.2 Detailing requirements in Seismic Zones 3 and
4. In Seismic Zones 3 and 4, elements supporting
discontinuous systems shall meet the following detailing
or member limitations:
1. Reinforced concrete or reinforced masonry
elements designed primarily as axial-load members shall
comply with Section 1921.4.4.5.
2. Reinforced concrete elements designed primarily
as flexural members and supporting other than light-frame
wood shear wall systems or light-frame steel and wood
structural panel shear wall systems shall comply with
Sections 1921.3.2 and 1921.3.3. Strength computations for
portions of slabs designed as supporting elements shall
include only those portions of the slab that comply with
the requirements of these Sections.
3. Masonry elements designed primarily as axial-
load carrying members shall comply with Sections
2106.1.12.4, Item 1, and 2108.2.6.2.6.
4. Masonry elements designed primarily as flexural
members shall comply with Section 2108.2.6.2.5.
5. Steel elements designed primarily as flexural
members or trusses shall have bracing for both top and
bottom beam flanges or chords at the location of the
support of the discontinuous system and shall comply with
the requirements of AISC-Seismic Part I, Section 9.4b.
17
(1) Section 1630.10.2 amended B Calculated.
Section 1630.10.2 is amended to read as follows:
1630.10.2 Calculated. Calculated story drift using eM
shall not exceed 0.025 times the story height for
structures having a fundamental period of less than 0.5
second. For structures having a fundamental period of 0.5
second or greater, the calculated story drift shall not
exceed O. 020/T 1/3 times the story height.
(Note: EXCEPTIONS remain unchanged)
(m) Section 1630.10.3 amended B Limitations.
Section 1630.10.3 is amended to read as follows:
1630.10.3 Limitations. The design lateral forces used to
determine the calculated drift may disregard the
limitations of Formula (30-6) and (30-7) (Errata Mar.
2001) and may be based on the period determined from
Formula (30-10) neglecting the 30 or 40 percent
limitations of Section 1630.2.2, Item 2.
(n) Section 1633.2.4 amended B Deformation
Compatibility.
Section 1633.2.4 is amended to read as follows:
021203 SID 0053118
1633.2.4 Deformation compatibility. All structural
framing elements and their connections, not required by
design to be part of the lateral-force-resisting system,
shall be designed and/or detailed to be adequate to
maintain support of design dead plus live loads when
subjected to the expected deformations caused by seismic
forces. P effects on such elements shall be considered.
Expected deformations shall be determined as the greater
of the Maximum Inelastic Response Displacement, M,
considering P effects determined in accordance with
Section 1630.9.2 or the deformation induced by a story
drift of 0.0025 times the story height. When computing
expected deformations, the stiffening effect of those
elements not part of the lateral-force-resisting system
shall be neglected.
For elements not part of the lateral-force-
resisting system, the forces induced by the expected
deformation may be considered as ultimate or factored
forces. When computing the forces induced by expected
deformations, the restraining effect of adjoining rigid
structures and nonstructural elements shall be considered
and a rational value of member and restraint stiffness
shall be used. Inelastic deformations of members and
connections are permitted to occur, provided the assumed
18
calculated capacities are consistent with member and
connection design and detailing.
(0) Section 1915.2.2 amended B Loads and Reactions.
Section 1915.2.2 is amended to read as follows:
1915.2.2 Base area of footing or number and arrangement
of piles shall be determined from the external forces and
moments (transmitted by footing to soil or piles) and
permissible soil pressure or permissible pile capacity
selected through principles of soil mechanics. External
forces and moments are those resulting from the load
combinations of Section 1612.3.
(p) Section 2204.1 amended B Load and Resistance
Factor Design
Section 2204.1 is amended by deleting the last sentence.
(q) Section 2204.2 amended B Allowable Stress
Design.
Section 2204.2 is amended by deleting the last sentence.
(r) Section 2205.3 amended B Seismic Design
Provisions for Structural Steel.
Section 2205.3 is amended by deleting the words Aor V=
at the end of the first sentence.
(s) Division IV of Chapter 22 amended B Seismic
Provisions for Structural Steel Buildings.
The subtitle of Division IV is amended to read as
follows:
Based on Seismic Provisions for Structural Steel
Buildings of the American Institute of Steel Construction. Parts I
and III, dated April 15,1997 and Supplement No.2, dated November
10, 2000
(t) Section 2210 amended B Adoption.
Section 2210 is amended to read as follows:
SECTION 2210 B ADOPTION
Except for the modifications set forth in Sections 2211
and 2212 of this division and the requirements of this Code,
the seismic design, fabrication, and erection of structural
steel buildings shall be in accordance with the Seismic
Provisions for Structural Steel Buildings, April 15, 1997
19
021203 sm 0053118
published by the American Institute of Steel Construction, 1
East Wacker Drive, Suite 3100, Chicago, IL 60601, as if set
out at length herein. The adoption of Structural Provisions
for Structural Steel Buildings in this Division, hereinafter
referred to as AISC-Seismic, shall include Parts I (LRFD) , and
III (ASD) , and Supplement No.2, dated November 10, 2000.
Where other codes, standards, or specifications are
referred to in this specification, they are to be considered
as only an indication of an acceptable method or material that
can be used with the approval of the Building Official.
(u) Section 2211 amended --Design Methods.
Section 2211 is amended to read as follows:
SECTION 2211 B DESIGN METHODS
When the load combinations from Section 1612.2 for LRFD
are used, structural steel buildings shall be designed in
accordance with Chapter 22 Division II (AISC-LRFD) and Part I
of AISC-Seismic as modified by this Division.
When the load combinations from Section 1612.3 for ASD
are used, structural steel buildings shall be designed in
accordance with Chapter 22 Division III (AISC-ASD) and Part
III of AISC-Seismic as modified by this Division.
(v) Section 2212 amended --General.
Section 2212 is amended to read as follows:
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II
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II
SECTION 2212 B AMENDMENTS
The AISC-Seismic adopted by this Division apply to the
seismic design of structural steel members except as modified
by this Section.
The following terms that appear in AISC-Seismic shall be
taken as indicated in the 1997 Uniform Building Code:
20
021203 sm 0053118
AISC Seismic 1997 Unifor.m Building Code
Seismic Force Resisting
System
Lateral Force Resisting
System
Design Earthquake Design Basis Ground Motion
Load Combinations Eqs. (4-
1) and (4-2)
Chapter 16 Eqs. (12-17)
and (12-18) respectively
LRFD Specification
Sections Eqs. (A4-1)
through (A4-6)
Chapter 16 Eqs. (12-1)
through (12 -6)
respectively
Ern
1. Part I, Sec. 1 of the AISC Seismic Provisions is revised
as follows:
1. SCOPE
These provisions are intended for the design and
construction of structural steel members and connections
in the Seismic Force Resisting Systems in buildings for
which the design forces resulting from earthquake motions
have been determined on the basis of various levels of
energy dissipation in the inelastic range of response.
These provisions shall apply to buildings in Seismic
Zone 2 with an importance factor I greater than one, in
Seismic Zone 3 and 4 or when required by the Engineer of
Record.
These provisions shall be applied in conjunction
with, Chapter 22, Division II, hereinafter referred to as
the LRFD Specification. All members and connections in
the Lateral Force Resisting System shall have a design
strength as provided in the LRFD Specification to resist
load combinations 12-1 through 12-6 (in Chapter 16) and
shall meet the requirements in these provisions.
Part I includes a Glossary, which is specifically
applicable to this Part, and Appendix S.
2. Part I, Sec. 4.1, first paragraph of the AISC Seismic
Provisions is revised as follows:
4.1 Loads and Load Combinations
The loads and load combinations shall those in
Section 1612.2 except as modified throughout these
provisions.
(w) Chapter 23, Division III amended B Design
Specifications for Allowable Stress Design of Wood Buildings.
21
021203 smOO53118
The introduction to Chapter 23, Division III Part I-ALLOWABLE
STRESS DESIGN OF WOOD is amended to read:
Division III-DESIGN SPECIFICATIONS FOR ALLOWABLE
STRESS DESIGN OF WOOD BUILDINGS
Part r-ALLOWABLE STRESS DESrGN OF WOOD
This standard, with certain exceptions, is the ANSr/NFoPA
NDS-97 National Design Specification for Wood
Construction of the American Forest and Paper
Association, 1997 Edition, and the Supplement to the
1997_Edition, National Design Specification, adopted by
reference.
The National Design Specification for Wood Construction,
1997 Edition, and supplement are available from the American
Forest and Paper Association, 1111 19th Street, NW, Eighth
Floor, Washington, DC, 20036.
(x) Section 2316 amended B Design Specifications.
Section 2316 is amended by replacing the phrase "revised
1991/1 with "1997 Edition NDS/I.
(y) Section 2316.2 Amendments Delete Reference and
Accompanying Table.
Section 2316.2 is amended by deleting Item 27 NDS
Supplement and accompanying Table 5A
deleted.
amended.
read:
deleted.
16.04.220 Section 110 of the California Mechanical Code
Section 110 of the California Mechanical Code is deleted.
16.04.230 Section 115 of the California Mechanical Code
Section 115 of the California Mechanical Code is amended to
"115. Any person desiring a permit required by this
code, shall, at the time of filing an application therefor,
pay a fee as set forth in the municipal fee schedule."
16.04.240 Appendix C of the California Mechanical Code
Appendix C of the California Mechanical Code is deleted.
16.04.250 California Historical Building Code adopted.
22
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The "California Historical Building Code", Title 24, Part
8 (authorized by Health and Safety Code sections 18950 through
18960), which provides alternative building regulations for the
rehabilitation, preservation, restoration, or relocation of
designated historic buildings, is adopted and by this reference is
made a part of this code with the same force and effect as though
set out in this chapter in full. A copy of the California
Historical Building Code is on fi and open to public inspection
in the office of the building official.
16.04.260 The 2001 California Code for Building Conserva-
tion adopted.
The 2001 "California Code for Building Conservation", being
Part 10 of the California Building Standards Code, and consisting
of Appendix Chapter 1 of the Uniform Code for Building Conserva-
tion, 1997 Edition, promulgated by the International Conference of
Building Officials, Whittier, California, is adopted as modified by
the California Building Standards commission, and by reference made
a part of this code with the same force and effect as though set
out herein in full. A copy of the California Code for Building
Conservation is on file and open to public inspection in the office
of the building official.
SECTION 2. The Council adopts the findings for local
amendments to the 2001 California Building Standards Code, which
findings are attached hereto as Exhibit "A" and incorporated herein
by reference.
SECTION 3. The Council finds that this project is exempt
from the provisions of the California Environmental Quality Act
("CEQA"), pursuant to Section 15061 of the CEQA Guidelines, because
it can be seen with certainty that there is no possibility that the
amendments herein adopted will have a significant effect on the
environment.
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II
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SECTION 4. This Ordinance shall become effective on the
commencement of the thirty-first day after the day of its adoption,
provided, however, the provisions herein acted shall be operative
from and after November I, 2002.
INTRODUCED: October 21, 2002
PASSED: November 12, 2002
AYES: BURCH, FREEMAN, KISHIMOTO, KLEINBERG, LYTLE, MORTON,
MOSSAR, OJAKIAN
NOES:
ABSTENTIONS:
ABSENT: BEECHAM
APPROVED AS TO FORM:
I.Y~~ ~~~,'5v-PtJ},
Ci tytorney . f
021119 sm 0053118
24
(
Planning and
nvironment
EXHIBIT A
FINDINGS FOR LOCAL AMENDMENTS TO TBE 2001
CALIFORNIA BUILDING CODE AND CALIFORNIA MECHANICAL
CODE, WITB RESPECT TO REGULATION OF BUILDINGS USED
FOR HUMAN BABITATION
Section 17958 of the California Health and Safety Code
provides that the City may make changes to the provisions of the
California Building Standards Code. Sections 17958.5 and 17958.7
of the Health and Safety Code require that for each proposed local
change to those provisions of the California Building Standards
Code which regulate buildings used for human habitation, the City
Council must make findings supporting its determination that each
such local change is reasonably necessary because of local
climatic, geological, or topographical conditions.
Local building regulations having the effect of amending
the uniform codes, which were adopted by the City prior to
November 23, 1970, were unaffected by the regulations of Sections
17958, 17958.5 and 17958.7 of the Health and Safety Code.
Therefore, amendments to the uniform codes which were adopted by
the City Council prior to November 23, 1970, and have been carried
through from year to year without significant change, need no
required findings. Also, amendments to provisions not regulating
buildings used for human habitation do not require findings.
1. Palo Alto Municipal Code ("PAMC") section 16.04.030,
Section 102 of the California Building Code deleted.
Finding: This administrative amendment is needed to conform
to the local procedures of the PAMC.
2. PAMC section 16.04.040, Section 104.2 of the California
Building Code amended.
Finding: This amendment brings the administrative provi-
sions of the Uniform Building Code into compliance with the
Palo Alto Municipal Code and the organization of the City
of Palo Alto.
3. PAMC section 16.04.050, Section 105 of the California
Building Code deleted.
Finding: This administrative amendment deletes California
Building Code Section 105, relating to a Board of Appeals.
This section is deleted to avoid conflict with the
procedures set forth in the Palo Alto Municipal Code.
25
021203 sm 0053118
4. PAMC section 16.04.090, Section 106.2.2 of the California
Building Code amended.
Finding: This administrative amendment amends a permitting
category to comply with the PAMC.
5. PAMC section 16.04.100, Section 106.6.6 of the California
Building Code amended.
Finding: This administrative amendment clarifies when a
permit expires.
6. PAMC section 16.04.110, Section 106.4.6 added to the
California Building Code.
Finding: This amendment requires the notification of the
occupants of a residential building prior to the issuance
of a demolition permit. This amendment also requires that
the building be vacated prior to the issuance of the
demolition permit. This administrative amendment is needed
to ensure the safety of the occupants of a building which
is to be demolished.
7. PAMC section 16.04.120, Section 109 of the California
Building Code amended.
Finding: This administrative amendment provides for a
Certificate of Occupancy to be issued for each occupant
change of a building. The amendment is needed for the
building to be inspected when tenants change to ascertain
compliance with life safety items. This section also
permits the issuance of a temporary Use and Occupancy
Certificate provided all life safety items have been
complied with prior to completion of the entire project.
8. PAMC section 16.04.130, Section 207 of the California
Building Code amended.
Finding: This administrative amendment is needed to make
the building code definition of "Family" conform to
California case law.
9. PAMC section 16.04.140, Section 904.2.10 added to the
California Building Code.
Finding. This amendment addresses the local need for
built-in fire protection when, in the opinion of local fire
officials, a particular building represents a fire-defense
problem that may exceed or tax the capability of the Palo
Alto Fire Department. This amendment is consistent with
Title 15 of the PAMC, and is necessary when geographic or
26
021203 sm 0053118
topographical conditions so require. With the elevation
changes within the City, development is following the path
of least resistance, creating a meandering pattern. This
does not lend itself to a good systematic street and road
layout, which would promote easy traffic flow. It has, in
fact, resulted in few major crosstown thoroughfares which
tend to be heavily congested, primarily during corrunute
hours and seasonal periods of the year. This creates
barriers which reduce the response time of fire equipment
and other emergency services. The topography of the City
is being burdened by major structures. Employment areas
are throughout the City. The people who work in these
complexes have added to the traffic congestion throughout
the City, thereby reducing the fire department's response
time capabilities.
Inherent delays caused by the traffic patterns to many of
these types of projects, make it necessary to mitigate this
problem by requiring additional built-in automatic fire
protection systems, that provide early detection and
initial control until the arrival of the fire department.
10. PAMC section 16.04.150, Section 1503-1 added to the
California Building Code.
Finding: This amendment is needed because the fire hazard
of wood roofs has long been recognized by the National Fire
Protection Association. Conflagrations in Santa Barbara,
Los Angeles and Houston have led to similar ordinances.
The Palo Alto foothills have caused many problems for fire
fighters including long response times, inadequate water
supply and unlimited fuel.
11. PAMC section 16.04.160, Table 18-1-C of the California
Building Code amended.
Finding: This amendment is needed due to Palo Al to's
expansive adobe soil conditions. The foundation required
is based on standard engineering practices.
12. PAMC section 16.04.170, Section 3403.6 added to California
Building Code.
Finding: This amendment requires that existing structures
be brought to current standards for earthquake forces at
the time of major remodeling if the value of the remodeling
exceeds fifty percent (50%) of the value of the existing
structure. This amendment is necessary because of Palo
Alto's proximity to major, active fault lines.
27
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13. PAMC section 16.04.180, Section 3403.7 added to California
Building Code.
Finding: This amendment requires that existing suspended
ceilings be braced for lateral forces at the time of
remodel. This amendment is necessary because of Palo
Alto's proximity to major, active fault lines.
14. Appendix Chapter 34, Division III of the Uniform Building
Code added.
Finding: Federal Emergency Management Agency (FEMA)
regulations require that the City adopt this amendment in
order to qualify for federal funds following a natural
disaster. The geographical, topographical or climatic
conditions in the City of Palo Alto make it particularly
susceptible to earthquakes and flooding conditions.
15. PAMC sections 16.04.200 and 16.04.210, Appendix Chapter 4
of the California Building Code amended by deleting Section
421-5 and adding Section 421.3.
Finding: This administrative amendment is necessary to
conform to the Palo Alto Municipal Fee Schedule.
16. 16.04.215 Adoption of Uniform Building Code, Volume 2.
Finding: These amendments have been developed by the
Structural Engineers Association of California. They
address deficiencies in the 1997 Uniform Building Code
identified in the Loma Prieta and Northridge earthquakes.
They are necessary due to Palo Alto's proximity to major
active fault lines.
17. PAMC section 16.04.220, Section 110 of the California
Mechanical Code deleted.
Finding: This administrative amendment is needed to
conform to local procedures of the Palo Al to Municipal
Code.
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