HomeMy WebLinkAboutStaff Report 431-07City of Palo Alto
City Manager’s Report
TO:HONORABLE CITY COUNCIL
FROM:CITY MANAGER DEPARTMENT: PLANNING AND
COMMUNITY ENVIRONS~NT
DATE:NOVEMBER 26, 2007 CMR: 431:07
SUBJECT:SECOND READING OF FIVE ORDINANCES:(1) REPEALING
CHAPTER 16.04 OF THE PALO ALTO MUNICIPAL CODE AND
ASCENDING TITLE 16 TO ADOPT A N~W CHAPTER 16.04,
CALIFORNIA BUILDING CODE, CALIFORNIA HISTORICAL
BUILDING CODE, AND CALIFORNIA EXISTING BUILDING CODE,
2007 EDITIONS, AND LOCAL AMEN-DMI~NTS AND RELATED
FINDINGS; (2) ADOPTING A NEW CHAPTER 16.05 OF THE PALO
ALTO MUNICIPAL CODE, CALIFORNIA 5~ECHANICAL CODE, 2007
EDITION; (3) REPEALING CHAPTER 16.08 OF THE PALO ALTO
MUNICIPAL CODE AN~ AMENDING TITLE 16 TO ADOPT A NEW
CHAPTER 16.08, CALIFORNIA PLUMBING CODE, 2007 EDITION, AND
LOCAL AMENDMENTS AND RELATED FINDINGS; (4) REPEALING
CHAPTER 16.16 OF THE PALO ALTO MUNICIPAL CODE AN3)
ASCENDING TITLE 16 TO ADOPT A NEW CHAPTER 16.16,
CALIFORNIA ELECTRICAL CODE, 2007 EDITION, AND LOCAL
AS~ENDMENTS AND RELATED FINDINGS; AND (5) ADOPTING A
NEW CHAPTER 16.17 OF THE PALO ALTO MUNICIPAL CODE,
CALIFORNIA ENERGY CODE, 2005 EDITION.
RECOMMI~NDATION
Staff recommends that the City Council conduct the required second reading of five ordinances
listed above, adopting by reference various parts of the 2007 California Building Standards Code
(CBSC), Title 24 of the California Code of Regulations with local amendments and the
necessary findings of fact supporting each local amendment.
The Ordinance Repealing Chapter 16.04 of the Palo Alto Municipal Code and Amending Title
16 to Adopt a New Chapter 16.04, California Building Code, California Historical Building
Code, and California Existing Building Code, 2007 Editions, with Local Amendments and
Related Findings is attached and reflects the additional amendment and related finding pertaining
CMR: 431:07 Page 1 of 2
to Palo Atto’s Flood Hazard Regulations, which was described in the CMR when the Council
adopted the ordinances on November 13.
PREPARED BY:
LARRY I. PE~L]N, PE
Chief Building Official
DEPARTMENT HEAD REVW, W:
CITY MANAGER APPROVAL:
STEVE E~SLIE
Director of Planning and Community Environment
Assistlant City Mana~.er
ATTACHMENTS
No Ordinance Repealing Chapter 16.04 of the Palo Alto Municipal Code and Amending
Title 16 to Adopt a New Chapter 16.04, California Building Code, California Historical
Building Code, and California Existing Building Code, 2007 Editions, with Local
Amendments and Related Findings.
COURTESY COPIES:
Chamber of Commerce
Stanford - Jean McCown
Home Builders Association
Board of Realtors
League of Woman Voters
Silicon Valley Leadership Group
Santa Clara Valley Chapter AIA
CMR: 431:07 Page 2 of 2
***NOT YET APPROVED***
ATTACHMENT A
ORDINANCE NO.
ORDINANCE OF THE COUNCIL OF THE CITY OF PALO ALTO
REPEALING CHAPTER 16.04 OF THE PALO ALTO MUNICIPAL
CODE AND AMENDING TITLE 16 TO ADOPT A NEW CHAPTER
16.04, CALIFORNIA BUILDING CODE, CALIFORNIA
HISTORICAL BUILDING CODE, AND CALIFORNIA EXISTING
BUILDING CODE, 2007 EDITIONS, AND LOCAL AMENDMENTS
The Council of the City of Pato Alto does ORDAIN as follows:
SECTION 1. Title 16 of the Palo Alto Municipal Code is hereby amended by
repealing in its entirety Chapter 16.04 and enacting a new chapter 16.04 to read as follows:
16.04.010 2007 California Building Code adopted.
Except as otherwise provided for in this Chapter, the California Building Code, 2007
edition, as adopted by Title 24, Part 2 of the California Code of Regulations, is approved and
adopted and hereby incorporated in this Chapter by reference and made a part hereof the same as if
fully set forth herein. One copy of the California Building Code, 2007 edition, has been filed for
use and examination of the public in the Office of the Building Official of the City of Palo Alto.
16.04.020 2007 California Building Code Appendix Chapters adopted
Except as otherwise provided for in this Chapter, the following Appendix Chapters of the
California Building Code, 2007 edition, are adopted, and are hereby incorporated in this Chapter by
reference and made a part hereof the same as if fully set forth herein:
A.Appendix Chapter 1 - Administration
B.Appendix C - Group U - Ag~cultural Buildings
C.Appendix I - Patio Covers
16.04.030 Cross - References to California Building Code
The provisions of this Chapter contain cross-references to the provisions of the California
Building Code, 2007 edition, in order to facilitate reference and comparison to those provisions.
16.04.040 Local Amendments
The provisions of this Chapter shall constitute local amendments to the cross-referenced provisions
of the California Building Code, 2007 edition, and shall be deemed to replace the cross-referenced
sections of said Code with the respective provisions set forth in this Chapter.
***NOT YET APPROVED***
16.04.050 Section 104.1.1 of Appendix Chapter One added - Enforcement -- Citation
authority.
Section 104.1.1 of Appendix Chapter One is added to the California Building Code to read:
104.1.1 Enforcement- Citation Authority. The employee positions designated in
this section may enforce the provisions of this chapter by the issuance of citations.
Persons employed in such positions are authorized to exercise the authority provided
in Penal Code section 836.5 and are authorized to issue citations for violations of
this chapter. The designated employee positions are: (1) chief building official; (2)
assistant building official; (3) building inspection supervisor; and (4) code
enforcement officer.
16.04.060 Section 105.1.3 of Appendix Chapter One added- Demolition permits.
Section 105.1.3 of Appendix Chapter One of the California Building Code is added to read:
105.5.1.3 Demolition permits. In addition to other requirements of law, every
person seeking a demolition permit for a unit used for residential rental purposes
shall furnish an affidavit or declaration under penalty 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.
16.04.070 Section 105.5 of Appendix Chapter One amended -Expiration.
Section 105.5 of Appendix Chapter One of the California Building Code is amended to read:
105.5 Expiration. Every permit issued shall expire by limitation and become null
and void if the work authorized by such permit is not commenced within 180 days
after its issuance, or if the work authorized by such permit is suspended or
abandoned for a period of 180 days after the time the work is commenced. Before
such work can be recommenced, a new permit shall be 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 construction
documents for such work. The building official is authorized to grant, in writing,
one or more extensions of time, for periods not more than 180 days each and may
require that the construction documents be revised to partially or fully comply
with current codes. Extensions shall be requested in writing and justifiable cause
demonstrated. For the purpose of this section, failure to progress a project to the
next level of required inspection shall be deemed to be abandonment of the
project.
//
0711tggTq-4Lal-~s 8260593 2
***NOT YET APPROVED***
16.04.080 Section 108.6 of Appendix Chapter One amended - Refunds.
Section 108.6 of Appendix Chapter One of the California Building Code is amended to read:
108.6 Refunds. The building official may authorize the refunding of any
fee paid hereunder which was erroneously paid or collected.
The building official may authorize the refunding of not more than eighty percent
(80%) of the Permit Fee paid when no work has been done under a Permit issued
in accordance with this Chapter.
The building official may authorize the refunding of not more than eighty percent
(80%) of the Plan Review Fee paid when an application is withdrawn or canceled
before any plan reviewing has been started.
The building official shall not authorize the refunding of any fee paid except upon
written application filed by the original permittee not later than 180 days after the
date of fee payment.
16.04.090 Section 109.7 of Appendix Chapter One added -Reinspections
Section 109.7 is added to Appendix Chapter One of the California Building Code to read:
109.7 Reinspections. A reinspection fee may be assessed by the building
official for each inspection or reinspection when such portion of work for which
inspection is called is not complete or when corrections called for are not made.
This section is not to be interpreted as requiring reinspection fees the first time
work is rejected for failure to comply with the requirements of the technical codes,
but as controlling the practice of calling for inspections before work is ready for
such inspection or reinspection. Reinspection fees may be assessed when the
inspection record card is not posted or otherwise available on the work site, the
approved plans are not readily available to the inspector, failure to provide access
on the date for which inspection is requested, or for deviating from plans requiring
the approval of the building official. When reinspection fees have been assessed,
additional inspection of the work will not be performed until the required fees have
been paid.
16.04.100 Section 110 of Appendix Chapter One amended - Certificate of Occupancy
Section 110 of Appendix Chapter One of the California Building Code is amended to read:
Section 110 Certificate of Occupancy
110.1 Use and occupancy. No building or structure shall be used or
occupied, and no change in the existing occupancy classification of a building or
structure or portion thereof shall be made until the building official has issued a
certificate of occupancy therefor as provided herein. Issuance of a certificate of
occupancy shall not be construed as an approval of a violation of the provisions of
this code or of other ordinances of the jurisdiction.
0711190-744~4 @S 8260593 3
***NOT YET APPROVED***
Exception: The following occupancies shall not require a certificate of
occupancy:
1. Group R- Division 3
2. Group U
110.2 Change of occupancy or tenancy. Each change of occupancy,
official name or tenancy of any building, structure or portion thereof, shall require
a new certificate 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 this code have been made and without requiring compliance
with all such requirements if he or she finds that the change in occupancy or
tenancy will result in no increased hazard to life or limb, 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 inform the applicant of those alterations necessary, or if none are necessary,
and shall make a report of compliance to the building offici!l.
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.
110.3 Certificate issued. After the building official inspects the building or
structure and finds no violations of the provisions of this code or other laws that
are enforced by the department of building safety, the building official shall issue
a certificate of occupancy that contains the following:
1. The buitding 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.
A statement that the described portion of the building has been inspected fox"
compliance with the requirements of this code for the occupancy and division of
occupancy and the use for which the proposed occupancy is classified.
6. The name of the building official.
071119~-~s 8260593 4
***NOT YET APPROVED***
7. The use and occupancy, in accordance with the provisions of Chapter 3.
110.4 Temporary occupancy. 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 or portion thereof
shall require a certificate of occupancy in accordance with the other provisions of
this section.
110.5 Posting. The certificate of occupancy shall be posted in a
conspicuous, readily accessible place in the building, or portion of building being
occupied, and shall not be removed except by the building official.
110.6 Revocation. The building official is authorized to, in writing,
suspend or revoke a certificate of occupancy or completion issued under the
provisions of this code wherever the certificate is issued in error, or on the basis
of incorrect information supplied, or where it is determined that the building or
structure or portion thereof is in violation of any ordinance or regulation or any of
the provisions of this code.
16.04.110 Section 113.1 of Appendix Chapter One amended - Violations -- Penalties.
Section 1 !3.1 of Appendix Chapter One of the California Building Code is amended to read"
113.1 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 ~iny 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
g~lilty of a misdemeanor, and such person is gxlilty 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.
//
071119~-gg-I-~s 8260593 5
***NOT YET APPROVED***
16.04.120 Section 113.5 of Appendix Chapter One - Recordation of building code
violations.
Section 113.5 of Appendix Chapter One of the California Building Code is added to read:
113.5 Recordation of building code violations. When the building official
determines that a violation of this chapter or chapters 16.05, 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 official
shall issue and record a release of the notice ofpendency of code violation.
16.04.130 Section 202 amended -Definitions (Family)
The definition of Family in Section 202 of the California Building Code is amended to read:
FAMILY [HCD-1] shall be as defined in Section 18.04.030 of the Palo Alto
Municipal Code.
16.04.140 Section 702A amended - Definitions (Wildland-Urban Interface Fire Area).
Section 702A (Wildtand-Urban Interface Fire Area) of the California Building Code is amended to
read:
WILDLAND-URBAN INTERFACE FIRE AREA is a geographical area
identified by the State of California as a "Fire Hazard Severity Zone" in
accordance with Public Resources Code Sections 4201 through 4202 and
Government Code Sections 51175 through 51189. Within the city limits of the
City of Palo Alto, "Wildland-Urban Fire Interface Area" shall also include all
areas west of Interstate 280 and a!l other areas recommended as a "Very High Fire
Hazard Severity Zone" by the Director of the California Department of Forestry.
16.04.150 Section 903.2 amended - Sprinkler systems, where required.
Section 903.2 of the California Building Code is amended to read:
903.2 Where required. Approved automatic sprinkler systems in new
buildings and structures and in existing modified buildings and structures, shall be
provided in the locations described in this section. Automatic fire sprinklers shall
be installed per the requirements set forth in Sections 903.2.1 through 903.2.13
and as follows, whichever is the more restrictive:
1. An automatic sprinkler system shall be provided throughout all new
buildings that have a gross floor area in excess of 3,600 square feet or that
are three (3) or more stories in height.
2. An automatic sprinkler system shall be provided throughout all
existing buildings when modifications are made that increases the gross
floor area to more than 3,600 square feet or increases the number of stories
to three (3) or more.
071119~-~s 8260593 6
***NOT YET APPROVED***
Exception: One-time additions to existing buildings made after
01/01/2008 that do not exceed 500 square feet in goss floor area.
3. An automatic sprinkler system shall be provided throughout all new
buildings located in the designated Wildland-Urban Interface Fire areas.
Exception: Any non-habitable structures accessory to single family
residences that have a goss floor area of 500 square feet or less.
4. An automatic sprinkler system shall be provided throughout all
existing buildings located in the designated Wildland-Urban Interface Fire
areas when modifications are made that increases the goss floor area.
Exception: One-time additions to existing buildings made after
01/01/1994 that do not exceed 500 square feet in goss floor area.
If an automatic fire sprinkler system is not required by any other section of this
code or the California Fire Code, the area increases specified in Section 506.3,
height or story increases specified in Section 504, or the fire resistive substitutions
specified in Table 601, which may have been permitted, shall apply.
16.04.160 Section 1206.3.4 added - Roof guards at interior courts.
Section 1206.3.4 is added to the California Building Code to read:
1206.3.4 Roof guards at interior courts. Roof openings into interior courts
that are bounded on all sides by building walls shall be protected with guards. The
top of the guard shall not be less than 42 inches in height above the adjacent roof
surface that can be walked upon. Intermediate rails shall be designed and spaced
such that a 12 inch diameter sphere cannot pass through.
Exception: Where the roof opening is geater than 600 square feet in area.
16.04.170 Section 1505.1.4 amended- Roofing requirements
Interface Fire Area.
Section !505.1.4 of the California Building Code is amended to read:
in a Wildland-Urban
1505.1.4 Roofing requirements in a Wildland-Urban Interface Fire Area.
The entire roof covering of every existing structure where more than 50 percent of
the total roof area is replaced within any one-year period, the entire roof covering
of every new structure, and any roof covering applied in the alteration, repair or
replacement of the roof of every existing structure, shall be a fire-retardant roof
covering that is at least Class A. Roofing requirements for structures located in a
Wildland-Urban Interface Fire Area shall also comply with Section 704A. 1.
16.04.175 Section 1612.!1 added - Palo Alto Flood Hazard Re.oulations referenced.
Section 1612.1.1 is added to the California Buildin~ Code to read:
1612.1.! Notwithstandin~ the provisions of Section ! 612.1. all construction
or development within a flood hazard area (areas depicted as a Special Flood
~7i119~S 8260593 7
***NOT YET APPROVED***
Hazard Area on Flood Insurance Rate Maps publisb.ed by the Federal Emeraencv
Management A~encv) shall comply with the City of Palo Alto Flood Hazard
Reaulations (Palo Alto Municipal Code Chapter 16.52). Where discrepancies
exist between the requirements of this code and said reaulations, the provisions of
said reaulations shall apply.
16.04.180 Table 1805.4.2 amended -Footings Supporting
Construction
Table 1805.4.2 of the California Building Code is amended to read:
TABLE 1805.4.2
Walls of Light-Frame
Footings Supporting Walls of Light-Frame Construction
Number of
Stories
Thickness of
Foundation
Wall
(inches)
Width of
Footing
(inches)
l&2 8 14 8
3 8 !8 8
Group U 8 12 12
Occupancies
Thickness of
Footing
(inches)
Depth of
Foundation
Below
Natural
Surface of
Ground
and Finish
Grade
(inches)
20
30
12
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.
16.04.190 Section 1908.1 amended to add section 1908.17 - Modifications to ACI 318
Section 1908.1 is amended and Section 1908.1.17 is added to Chapter 19 of the California
Building Code to read as follows:
1908.1 General. The text of ACI 318 shall be modified as indicated in Sections
1908.1.1 through 1908.1.17.
1908.1.17 ACI 318, Section 14.8. Modify ACI 318 Section 14.8.3 and 14.8.4
replacing equation (14-7), (14-8) and. (14-9).
1. Modify equation (14-7) of ACI 318 Section 14.8.3 as follows:
071119~-O-Tqq-O4-~s 8260593 8
***NOT YET APPROVED***
Ior shall be calculated by Equation (14-7), and Ma shall be obtained by iteration of
deflections.
-- 2--~)3 (14-7)=Es A,+fy
and the value Es/Ec shall not be taken less than 6.
Modify ACI 318 Sec, 14.8.4 as follows:
14.8.4 -Maximum out-of-plane deflection, As, due to service loads, including PA
effects, shall not exceed 1o/150.
If Ma, maximum moment at mid-height of wall due to service lateral and eccentric
loads, including PA effects, exceed (2/3) Mor, As s shall be calculated by Equation
(14-8):
(14-8)
IfMa does not exceed (2/3) Mcr, As shall be calculated by Equation (14-9):
(14-9)
where:
5 M ~l~A -cr 48 E cI g
5M.l~An -
48 E ~I ~,.
16.04.200 Section 2802.2 added - Existing Group R occupancies.
Section 2802.2 is added to the California Building Code to read:
071119 -.0944~ cjs 8260593 9
***NOT YET APPROVED***
2802.2 Existing Group R Occupancies. When any replacement, alteration or
repair to the roof of an existing Group R Occupancy is performed, a spark arrester
shall be installed to the existing chimney in accordance with Section 2802.1.
16.04.210 Section 3302.3 added - Fire walls.
Section3302.3 is added to the California Building Code to read:
3302.3 Fire walls. When fire walls are required, the fu’e wall construction shall
be completed, with all openings protected, immediately after the building is
sufficiently weather protected at the location of the wall(s).
16.04.220 Section 3310.1 amended - Stairways required
Section 3310.1 of the California Building Code is amended to read:
3310.1 Stairways required. All floor levels above the first story in new multi-
story buildings that require 2 exit stairs shall be provided with at least two usable
exit stairways (temporary or permanent) after the floor decking is installed. The
stairways shall be continuous and discharge to grade level. Stairways serving
more than two floor levels shall be enclosed (with openings adequately protected)
after exterior walls/windows are in place. Exit stairs in new and in existing
occupied buildings shall be lighted and maintained clear of debris and
construction materials at all times.
Exception: For new multi-story buildings, one of the required exit stairs may be
obstructed on not more than two contiguous floor levels for the purposes of
stairway construction (i.e., installation of gypsum board, painting, flooring, etc.).
16.04.230 Section 3310.3 added -Required means of egress.
Section 3310.3 is added to the California Building Code to read:
3310.3 Required means of egress. All new buildings under construction shall
have a least one unobstructed means of egress. All means of egress shall be
identified in the Fire Protection Plan.
16.04.240 Section 3402.1 amended -Definition of Substantial Structural Damage.
Section 3402.1 of the California Building Code is amended to include the following definition:
SUBSTANTIAL STRUCTURAL DAMAGE. A condition where:
1. In any story, the vertical elements of the lateral-force-resisting
system, have suffered damage such that the lateral load-carrying capacity of the
structure in any direction has been reduced by more than 20 percent from its pre-
damaged condition, or
2. The capacity of any vertical gravity load-carrying component, or any
group of such components, that supports more than 30 percent of the total area of
the structure’s floor(s) and roof(s) has been reduced more than 20 percent from its
pre-damaged condition, and the remaining capacity of such affected elements
0711t90-Tq-!-O4~s 8260593 10
***NOT YET APPROVED***
with respect to all dead and live loads is less than 75 percent of that required by
the building code for new buildings of similar structure, purpose, and location.
16.04.250 Section 3403.5 added- Repairs.
Section 3403.5 is added to the California Building Code to read:
3403.5 Repairs. Repairs of structural elements shal! comply with this section.
3403.5.1 Seismic evaluation and design. Seismic evaluation and design of an
existing building and its components shall be based on the following criteria:
3403.5.1.1 Evaluation and design procedures. The seismic evaluation and design
shall be based on the following procedures:
a)As specified in Chapter 16 of this code.
b)ASCE 31 Seismic Evaluation of Existing Buildings (for evaluation only).
c)ASCE 41 Seismic Rehabilitation of Existing Buildings.
d)The procedures contained in Appendix Chapter A2 and Appendix Chapter
A3 of the International Existing Building Code (IEBC) and Appendix
Chapter A1 of California Existing Building Code (CEBC) shall be
permitted to be used as specified in Section 3403.5.1.3.
3403.5.1.2 CBC level seismic forces. When seismic forces are required to meet
the building code level, they shal! be one of the following:
1. 100 percent of the values in the building code. The R factor used for
analysis in accordance with Chapter 16 of this code shall be the R factor
specified for structural systems classified as "Ordinary" unless it can be
demonstrated that the structural system satisfies the proportioning and
detailing requirements for systems classified as "Intermediate" or
"Special."
Forces corresponding to BSE-1 and BSE-2 Earthquake Hazard Levels
defined in ASCE 41. Where ASCE 41 is used, the corresponding
performance levels shall be those shown in Table 3403.5.1.2.
TABLE 3403.5.1.2
ASCE 41 and ASCE 31 PERFORMANCE LEVELS
OCCUPANCY
CATEGORY
(BASED ON
TABLE 1604.5)
II
PERFORMANCE LEVEL
FOR USE WITH ASCE 31
AND WITH ASCE 41
BSE-1 EARTHQUAKE
HAZARD LEVEL
Life Safety (LS)
Life Safety (LS)
PERFORMANCE
LEVEL FOR
USE WITH ASCE
41 BSE-2
EARTHQUAKE
HAZARD LEVEL
Collapse Prevention
(cP)
Collapse Prevention
071119 -.c3-7440~cjs 8260593 11
***NOT YET APPROVED***
(CP)
III Note (a)Note (a)
IV Immediate Occupancy (IO)Life Safety (LS)
a. Performance Levels for Occupancy Category III shall be taken as
halfway between the performance levels specified for Occupancy
Category II and Occupancy Category IV.
3403.5.1.3 Reduced CBC level seismic forces. When seismic forces are
permitted to meet reduced building code levels, they shall be one of the following:
1. 75 percent of the forces prescribed in this code. The R factor used for
analysis in accordance with Chapter 16 of the building code shall be the R
factor as specified in Section 3403.5.1.2.
2. In accordance with the applicable chapters in Appendix A of the 2006
International Existing Building Code (IEBC) and 2007 California Existing
Building Code (CEBC), as specified in Items 2.1 through 2.3 below.
Structures or portions of structures that comply with the requirements of
the applicable chapter in Appendix A shall be deemed to comply with the
requirements for reduced building code force levels.
2.1. The seismic evaluation and design of unreinforced masonry
bearing wall buildings in Occupancy Category I or II are permitted to
be based on the procedures specified in Appendix Chapter A1 of the
CEBC.
2.2. Seismic evaluation and design of the wall anchorage system in
reinforced concrete and reinforced masonry wall buildings with
flexible diaphragms in Occupancy Category I or II are permitted to be
based on the procedures specified in Appendix Chapter A2 of the
IEBC.
2.3. Seismic evaluation and design of cripple walls and sill plate
anchorage in residential buildings of light-frame wood construction in
Occupancy Category I or II are permitted to be based on the
procedures specified in Appendix Chapter A3 of the IEBC.
3. In accordance with ASCE 31 based on the applicable performance
level as shown in Table 3403.5.1.2.
4. Those associated with the BSE-1 Earthquake Hazard Level defined in
ASCE 41 and the performance level as shown in Table 3403.5.1.2. Where
ASCE 41 is used, the design spectral response acceleration parameters Sxs
and Sxl shall not be taken less than 75 percent of the respective design
spectral response acceleration parameters SDS and Sm defined by this code
and reference standards.
0711t9~s 8260593 12
***NOT YET APPROVED***
3403.5.2 Wind Design. Wind design of existing buildings shall be based on the
procedures specified in this code.
3403.5.3 Repairs to damaged buildings. Repairs to damaged buildings shall
comply with this section.
3403.5.3.1 Unsafe conditions. Regardless of the extent of structural damage,
unsafe conditions shall be eliminated.
3403.5.3.2 Substantial structural damage to vertical elements of the lateral-
force-resisting system. A building that has sustained substantial structural
damage to the vertical elements of its lateral-force-resisting system shatl be
evaluated and repaired in accordance with the applicable provisions of Section
3403.5.3.2.1 through M03.3.z._.3.
3403.5.3.2.1 Evaluation. The building shall be evaluated by a registered desig-n
professional, and the evaluation findings shall be submitted to the building
official. The evaluation shall establish whether the damaged building, if repaired
to its pre-damage state, would comply with the provisions of this code. Wind
forces for this evaluation shall be those prescribed in this code. Seismic forces for
this evaluation are permitted to be the reduced level seismic forces specified in
Code Section 3403.5.1.3.
3403.5.3.2.2 Extent of repair for compliant buildings. If the evaluation
establishes compliance of the pre-damage building in accordance with Section
3403.5.3.2.1, then repairs shall be permitted that restore the building to its pre-
damage state, using materials and stren~hs that existed prior to the damage.
3403.5.3.2.3 Extent of repair for non-compliant buildings. If the evaluation
does not establish compliance of the pre-damage building in accordance with
Section 3403.5.3.2.1, then the building shall be rehabilitated to comply with
applicable provisions of this code for load combinations including wind or
seismic forces. The wind design level for the repair shall be as required by the
building code in effect at the time of original construction unless the damage was
caused by wind, in which case the design level shall be as required by the code in
effect at the time of origina! construction or as required by this code, whichever is
geater. Seismic forces for this rehabilitation design shall be those required for
the design of the pre-damaged building, but not less than the reduced level
seismic forces specified in Section 3403.5.1.3. New structural members and
connections required by this rehabilitation design shal! comply with the detailing
provisions of this code for new buildings of similar structure, purpose, and
location.
3403.5.3.3 Substantial structural damage to vertical load-carrying
components. Vertical load-carrying components that have sustained substantial
structural damage shall be rehabilitated to comply with the applicable provisions
071119 07-44~,~s 8260593 13
***NOT YET APPROVED***
for dead and live loads in this code. Undamaged vertical load-carrying
components that receive dead or live loads from rehabilitated components shal!
also be rehabilitated to carry the design loads of the rehabilitation design. New
structural members and connections required by this rehabilitation design shall
comply with the detailing provisions of this code for new buildings of similar
structure, purpose, and location.
3403.5.3.3.1 Lateral force-resisting elements. Regardless of the level of damage
to vertical elements of the lateral force-resisting system, if substantia! structural
damage to vertical load-carrying components was caused primarily by wind or
seismic effects, then the building shall be evaluated in accordance with Section
3403.5.3.2.1 and, if non-compliant, rehabilitated in accordance with Section
.~40~.5._~.2.~.
3403.5.3.4 Less than substantial structural damage. For damage less than
substantial structural damage, repairs shall be allowed that restore the building to
its pre-damage state, using materials and stren~hs that existed prior to the
damage. New structural members and connections used for this repair shall
comply with the detailing provisions of the building code for new buildings of
similar structure, purpose, and location.
3403.5.4 Referenced Standards
Referenced
Standard
Number
ASCE 31-03
ASCE 41-06
Title
Seismic Evaluation of Existing Buildings
Seismic Rehabilitation of Existing
Buildings
Referenced Code
Section Number
3403.5.!.1
TABLE 3403.5.1.2
3403.5.1.3
3403.5.1.1
3403.5.1.2
TABLE 3403.5.1.2
3403.5.1.3
16.04.260 Section 3403.6 added -Additions, alterations and repairs exceeding 50%.
Section 3403.6 is added to the California Building Code to read:
3403.6 Additions, alterations and repairs exceeding 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 1613 for new buildings
07l! !9 07M404 cjs 8260593 14
***NOT YET APPROVED***
or structures. Value shall be determined from the cost per square foot table in the
most current issue of Buildin~ Safety Journal, published by the International Code
Council, as may be modified from time to time by the building official.
Exception: Existing buildings or structures of Group R or U
Occupancies.
16.04.270 Section 3403.7 added - Suspended ceiling systems.
Section 3403.7 is added to the California Building Code to read:
3403.7 Suspended ceiling systems. In existing buildings or structures, 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 Section 803.9.1.
16.04.280 Referenced Standard amended- ASCE 7, Section 12.12.3.
Section 12.12.3 of Referenced Standard ASCE 7 is amended to read as follows:
12.12.3 Minimum Building Separation. All structures shall be separated from
adjoining structures. Separations shall allow for the maximum inelastic response
displacement (AM). AM shall be determined at critical locations with
consideration for both translational and torsional displacements of the structure as
follows:
/~ M "-- C dt~max (Equation 16-45)
where d max is the calculated maximum displacement at Level x as define in ASCE
7 Section 12.8.4.3.
Adjacent buildings on the same property shall be separated by at least a distance
~ MT, where
m MT (m M1 q- (z~ M2 )(Equation 16-46)
and AM1 and Am are the maximum inelastic response displacements of the
adjacent buildings.
Where a structure adjoins a property line not common to a public way, the
structure shall also be set back from the property line by at least the displacement,
A M, of that structure.
Exception: Smaller separations or property line setbacks shall be
permitted when justified by rational analyses.
16.04.290 2007 California Historical Building Code adopted.
071119974-t4Ll-~s 8260593 15
***NOT YET APPROVED***
The California Historical Building Code, 2007 Edition, 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 hereby incorporated in this Chapter by reference and made a part hereof
the same as if fully set forth herein. One copy of the California Historical Building Code, 2007
edition, has been filed for use and examination of the public in the Office of the Building Official of
the City of Palo Alto.
16.04.300 2007 California Existing Building Code adopted.
The California Existing Building Code, 2007 Edition, Title 24, Part 10, which provides
alternative building regulations for the rehabilitation, preservation, restoration, or relocation of
existing buildings, is adopted and hereby incorporated in this Chapter by reference and made a part
hereof the same as if fully set forth herein. One copy of the California Existing Building Code,
2007 edition, has been filed for use and examination of the public in the Office of the Building
Official of the City of Palo Alto.
SECTION 2. The Council adopts the findings for local amendments to the
California Building Code, 2007 Edition, 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.
///
///
07tltg-.O-Tqq4~Os 8260593 16
SECTION 4.
date of its adoption.
INTRODUCED:
PASSED:
AYES:
NOES:
ABSENT:
ABSTENTIONS:
ATTEST:
City Clerk
APPROVED AS TO FORM:
City Attorney
***NOT YET APPROVED***
This ordinance shall be effective on the thirty-first day after the
Mayor
APPROVED:
City Manager
Director of Planning & Community
Environment
Director of Administrative
Services
071119 074494 cjs 8260593 17
***NOT YET APPROVED***
Exhibit A
FINDINGS FOR LOCAL AMENDMENTS
TO CALIFORNIA BUILDING CODE
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.
A. Explanation of Administrative Amendments
16.04.050 Section 105.1.3 of Appendix Chapter 1 added -Demolition permits
This amendment requires the notification of the occupants of a residential building prior to the
issuance of a demolition permit, and requires that the building be vacated prior to the issuance of
the demolition permit. This is an administrative amendment that is needed to ensure the safety
of the occupants of a building which is proposed to be demolished.
16.04.060 Section 105.5 of Appendix Chapter 1 amended -Expiration
This is an administrative amendment to clarify when a permit expires.
16.04.070 Section 108.6 of Appendix Chapter 1 amended- Refunds;
16.04.080 Section 109.7 of Appendix Chapter 1 added- Reinspections;
16.04.050 Section 104.1.1 of Appendix Chapter One added Enforcement - Citation authority;
16.04.110 Section 113.1 of Appendix Chapter One amended - Violations - Penalties;
16.04.120 Section 113.5 of Appendix Chapter One Recordation of building code
violations.
These amendments bring the administrative provisions of the California Building Code into
compliance with the Palo Alto Municipal Code and the organization of the City of Pa!o Alto.
16.04.090 Section 110 of Appendix Chapter 1 amended - Certificate of Occupancy
This administrative amendment provides for a Certificate of Occupancy to be issued for each
occupancy change of a building or portion thereof. The amendment is needed for the building to
be inspected when tenants change to ascertain compliance with life safety and accessibility
requirements. This section also permits the issuance of a temporary Use and Occupancy
071 19 074-1494 cjs 8260593 1 8
***NOT YET APPROVED***
Certificate provided all life safety and accessibility requirements have been complied with prior
to completion of the entire project.
16.04.130 Section 202 amended- Definitions (Family)
This administrative amendment is necessary to conform the Building Code definition of
"Family" to the Palo Alto Municipal Code.
B. Findings for Substantive Local Amendments
16.04.140 Section 702A amended -Definitions (Wildland-Urban Interface Fire Area)
Finding: This amendment makes the provisions of the California Building Code, 2007 edition,
as amended locally, consistent with those of the California Fire Code, 2007 edition, as amended
locally. The Finding for this amendment is set forth in Exhibit A of the City’s Ordinance
Adopting the California Fire Code, 2007 Edition, which explains that additional precautions are
necessary to mitigate the additiona! fire risks in the Palo Alto foothills hazardous fire zone.
16.04.150 Section 903.2 amended - Sprinkler Systems Where required
Finding: This amendment makes the provisions of the California Building Code, 2007 edition,
as amended locally, consistent with those of the California Fire Code, 2007 edition, as amended
locally. The Finding for this amendment is set forth in Exhibit A of the City’s Ordinance
Adopting the California Fire Code, 2007 edition, which explains that additional precautions are
necessary to mitigate the additional fire risks in the Palo Alto foothills hazardous fire zone, and
in the densely populated area of Palo Alto.
16.04.160 Section 1206.3.4 added -Roof guards at interior courts
Finding: This amendment makes the provisions of the California Building Code, 2007 edition,
as amended locatly, consistent with those of the California Fire Code, 2007 edition, as amended
locally. The Finding for this amendment is set forth in Exhibit A of the City’s Ordinance
Adopting the California Fire Code, 2007 edition.
16.04.170 Section 1505.1.4 amended - Roofing requirements in a Wildland-Urban
Interface Fire Area
Finding: This amendment makes the provisions of the California Building Code, 2007 edition,
as amended locally, consistent with those of the California Fire Code, 2007 edition, as amended
locally. The Finding for this amendment is set forth in Exhibit A of the City’s Ordinance
Adopting the California Fire Code, 2007 edition, which explains that additional precautions are
necessary to mitigate the additional fire risks in the Pa!o Alto foothills hazardous fire zone..
16.04.180 Table 1805.4.2 amended - Footings Supporting Walls of Light-Frame
Construction
Finding: This amendment is needed due to Palo Alto’s expansive adobe soil conditions. The
minimum foundation requirements are based on sound engineering practices.
16.04.190 Section 1908 amended - Modifications to ACI 318
Finding: The greater San Francisco Bay region is a densely populated area with many buildings
constructed over and near a vast array of fault systems capable of producing major earthquakes,
071119 ~-~t-t4N-. cjs 8260593 ] 9
***NOT YET APPROVED***
including but not limited to, the 1989 Loma Prieta Earthquake. The proposed modification to
ensure that the design of slender walls must satisfy both stren~h and serviceability requirements
needs to be incorporated into the local Building Code to ensure that new buildings and additions
to existing buildings are designed and constructed in accordance with the scope and objectives of
the California Building Code.
16.04.200 Section 2802.2 added -Existing Group R occupancies
Finding: This amendment makes the provisions of the California Building Code, 2007 edition,
as amended locally, consistent with those of the California Fire Code, 2007 edition, as amended
locally. The Finding for this amendment is set forth in Exhibit A of the City’s Ordinance
Adopting the California Fire Code, 2007 edition.
16.04.210 Section 3302.3 added - Fire walls
Finding: This amendment makes the provisions of the California Building Code, 2007 edition,
as amended locally, consistent with those of the California Fire Code, 2007 edition, as amended
locally. The Finding for this amendment is set forth in the City’s Ordinance Adopting the
California Fire Code, 2007 edition.
16.04.220 Section 3310.1 amended - Stairways required
Finding: This amendment makes the provisions of the California Building Code, 2007 edition,
as amended locally, consistent with those of the California Fire Code, 2007 edition, as amended
locally. The Finding for this amendment is set forth in Exhibit A of the City’s Ordinance
Adopting the California Fire Code, 2007 edition.
16.04.230 Section 3310.3 added- Required means of egress
Finding: This amendment makes the provisions of the California Building Code, 2007 edition,
as amended locally, consistent with those of the California Fire Code, 2007 edition, as amended
locally. The Finding for this amendment is set forth in Exhibit A of the City’s Ordinance
Adopting the California Fire Code, 2007 edition.
16.04.240 Section 3402.1 amended - Definitions (Substantial Structural Damage;
16.04.250 Section 3403.5 added -Repairs
Finding:. The geater San Francisco Bay region is a densely populated area with many buildings
constructed over and near a vast array of fault systems capable of producing major earthquakes,
including but not limited to, the 1989 Loma Prieta Earthquake, and other natural and man-made
disasters. These amendments are intended to promote pre-disaster mitigation measures as part of
repairs and renovations to existing buildings, as well as establish reasonable repair and
reconstruction requirements for damaged buildings, in a manner consistent with the Federal
Emergency Management Agency’s (FEMA’ s) implementation of the Robert T. Stafford Disaster
Relief and Emergency Assistance Act, as amended, ("Stafford Act"), so that Public Assistance
funds may be secured for the repair and restoration of eligible government and non-profit
facilities damaged in a Presidential declared disaster.
16.04.260 Section 3403.6 added -Additions, alterations and repairs exceeding 50%
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
071t19~-0-74-t-g4- ~s 8260593 20
***NOT YET APPROVED***
percent (50%) of the value of the existing structure. This amendment is necessary because the
greater San Francisco Bay region is a densely populated area with many buildings constructed
over and near a vast array of fault systems capable of producing major earthquakes, including but
not limited to, the 1989 Loma Prieta Earthquake.
16.04.270 Section 3403.7 added - Suspended ceiling systems
Finding: This amendment requires that existing suspended ceilings be braced for lateral forces at
the time of remodel work. This amendment is necessary because the greater San Francisco Bay
region is a densely populated area with many buildings constructed over and near a vast array of
fault systems capable of producing major earthquakes, including but not limited to, the 1989
Loma Prieta Earthquake.
16.04.i75 Section 16!2.1.1 added - Palo Alto Flood Hazard Regulations referenced
Finding: This section is amended to conform to other provisions of the Palo Alto Municipal
Code and to comply with the National Flood Insurance Proaram (implementin~ the National
Flood Act of 1968. as amended), and federal regulations adopted thereunder for the purpose of
promotin~ ~)ublic health, safeW and ae~eral welfare m~d to minimize public and private losses
due to flood conditions in specific areas of the Cit~.’ defined by unique topographic conditions.
16.04.280 Referenced Standard amended - ASCE 7, Section 12.12.3
Finding: The greater San Francisco Bay region is a densely populated area with many buildings
constructed over and near a vast array of fault systems capable of producing major earthquakes,
including but not limited to the 1989 Loma Prieta Earthquake. The seismic separation is
necessary to permit adjoining buildings, or parts thereof, to respond to earthquake ground motion
independently and preclude possible structural damage due to pounding between buildings and
other structures. The need to inco~orate this modification into the local Building Code will help
to ensure that new buildings and additions to existing buildings are designed and constructed in
accordance with the scope and objectives of the California Building Code.
071119~I-~s 8260593 21