HomeMy WebLinkAbout14 - PH-1 - 2016 California Residential Code Wind - 1/17/2017CITY COUNCIL AGENDA REPORT
MEETING DATE: JANUARY 17, 2017
ITEM NUMBER: PH -1
SUBJECT: 2016 CALIFORNIA RESIDENTIAL BUILDING CODE WIND SPEED REVISION
DATE: JANUARY 10, 2017
FROM: DEVELOPMENT SERVICES DEPARTMENT
PRESENTATION BY: RON BEEHLER, INTERIM BUILDING OFFICIAL
SHERI VANDER DUSSEN, INTERIM ASSISTANT
DIRECTOR
DEVELOPMENT SERVICES DEPARTMENT
FOR FURTHER INFORMATION CONTACT: RON BEEHLER (714)754-5604
RON.BEEHLER@COSTAMESACA.GOV
RECOMMENDATION:
Introduce for first reading the attached ordinance to update the Costa Mesa
Municipal Code Section 5-1.3c to reflect climatic and geographic design criteria
applicable for the design of residential structures within the City.
BACKGROUND:
As required by Section 17958 of the California Health and Safety Code, the City
Council approved the second reading of the ordinance adopting the 2016 California
Building Codes on December 6, 2016, following introduction of the ordinance on
November 15, 2016. Section R301.2.1 of the 2016 California Residential Code requires
each municipality to specify the Ultimate Wind Speed applicable for the design of
residential structures and to identify whether there exists Special Wind Regions or Wind
Borne Debris Zones within the community. Section R301.2 of the 2016 California
Residential Code requires local jurisdictions to establish climatic and geographic design
criteria as indicated in California Residential Code Table R301.2(1). The Ultimate Wind
Speed as identified in the 2016 California Residential Code for the City of Costa Mesa
is 110 mph. Specifying an Ultimate Wind Speed of 110 mph in Table R301.2(1) will
result in no net increase to the loads and forces utilized for building design as
compared to the previously adopted 2013 California Residential Building Code. There
are no Special Wind Regions or Wind Borne Debris Zones within the City of Costa
Mesa. All other information included in Table R301.2(1) is unchanged.
FISCAL REVIEW:
The proposed updates to Municipal Code Section 5-1.3c, Table R301.2(1) will not have
any fiscal impact on the City's budget.
LEGAL REVIEW:
The City Attorney has approved the attached ordinance as to form.
ALTERNATIVES CONSIDERED:
The recent statewide adoption of the 2016 California Residential Code requires that this
table be included in the building codes adopted by each municipality.
CONCLUSION:
Staff recommends that the City Council adopt the proposed ordinance to be in
compliance with the requirements of the 2016 California Residential Code by updating the
Municipal Code to specify the correct Ultimate Wind Speed to be used for design of
residential structures and to clarify that no Special Wind Regions or Wind Borne Debris
Zones exist within the City of Costa Mesa.
JAY TREVINO, AICP RON BEEHLER, SE, CBO
Development Services Department Consultant Interim Building Official
ATTACHMENTS:
1. Current and Proposed Municipal Code Section 5-1.3c, Table R301.2(1
2. Ordinance uadatina Municiaal Code Section 5-1.3c. Table R301.2(1)
TABLE R301.2(1)
CLIMATIC AND GEOGRAPHIC DESIGN CRITERIA
ATTACHMENT 1
Existing
GROUND
WIND'DESIGN
',.
SEISMIC
SUBJECT TO DAMAGE FROM
.Frost
WINTER
ICE BARRIER -
AlR
AIR
MEAN
Speed
-
SNOW
opographi
DESIGN
- line
DESIGN
UNDERLAYMENT
FLOOD
FREEZING
ANNUAL
LOAD
(mph) effects
CATEGORY.eathering.°
Depth ° ermite
TEMP-
REQUIRED h.
HAZARDS
INDEX!
TEMPI
LOAD
(mph)
'effects'°
debris'
Very
Weathering'
See
TEMP°
REQUIRED" HAZARDS a
Zero .
85 No
Di
Ne II ible
12-24"
Hea
43
Na
Footnote
D
60
TABLE R301.2(1 Proposed
CLIMATIC AND GEOGRAPHIC DESIGN CRITERIA
GROUND
WIND DESIGN' -
SEISMIC
'SUBJECTTO DAMAGE FROM
WINTER
- -'-
ICE BARRIER
AlR
MEAN
Wind-
-
SNOW
Speed^
Topographic
SPeclal
borne
DESIGN
Frost
DESIGN
UNDERLAYMENT FLOOD
FREEZING
ANNUAL
LOAD
(mph)
'effects'°
debris'
CATEGORY'
Weathering'
Termite °
TEMP°
REQUIRED" HAZARDS a
INDEX'
'TEMP''
region
zone-
delnth°
p
Zao
110
No
No
No
Dx
NegSgible
12"to2V
VeryHezry
43
No See F--aeg
0
60
ORDINANCE NO.
AN ORDINANCE OF THE CITY COUNCIL OF THE CITY OF COSTA MESA,
CALIFORNIA, AMENDING TITLE 5, CHAPTER 1, TABLE R301.2(1) OF THE COSTA
MESA MUNICIPAL CODE BY ESTABLISHING THE ULTIMATE DESIGN WIND
SPEED TO BE UTILIZED FOR THE DESIGN OF RESIDENTIAL STRUCTURES AS
REQUIRED BY THE 2016 CALIFORNIA RESIDENTIAL CODE AND FURTHER
ESTABLISHING THAT THE CITY OF COSTA MESA IS NOT WITHIN EITHER A
SPECIAL WIND REGION OR A WIND BORNE DEBRIS ZONE.
THE CITY COUNCIL OF THE CITY OF COSTA MESA FINDS AS FOLLOWS:
WHEREAS, Health and Safety Code Section 17958 provides that the City of
Costa Mesa ("City") shall adopt Ordinances and regulations imposing the same or
modified or changed building regulation requirements as are contained in the
regulations adopted by the State pursuant to Health and Safety Code Section 17922;
and
WHEREAS, the State of California is mandated by Health and Safety Code
Section 17922 to impose the same requirements as are contained in the most recent
edition of the California Residential Code; and
WHEREAS, Section R301.2 of the 2016 California Residential Code provides
that the local jurisdiction responsible for regulating residential construction within the
community set forth climatic and geographic design criteria set forth in Table R301.2(1)
including the Ultimate Design Wind Speed to be utilized for the design of residential
structures within the community in addition to establishing if the community is within a
Special Wind Region or a Wind Borne Debris Zone, and;
WHEREAS, the Ultimate Design Wind Speed per California Residential Code
Figure R301.2(1) establishes the Ultimate Design Wind Speed to be utilized for the
design of residential structures within the City of Costa Mesa as being 110 mph and
that the community is not within a Special Wind Region or a Wind Borne Debris Zone.
NOW, THEREFORE, THE CITY COUNCIL OF THE CITY OF COSTA MESA
DOES HEREBY ORDAIN AS FOLLOWS:
Q,01-fiinn 1
The Ultimate Design Wind Speed to be utilized for the design of residential
structures within the City of Costa Mesa shall be 110 mph and establishing the City of
Costa Mesa as not being within a Special Wind Region or a Wind Borne Debris Zone
as identified by Figure R301.2(1) of the 2016 California Residential Code.
Q,01-fiinn `J
Section 5-1.3 of Chapter I, Title 5, of the Costa Mesa Municipal Code Figure
R301.2(1) is hereby amended to read as follows:
TABLE R301.2(1
CLIMATIC AND GEOGRAPHIC U SIGN CRITERIA
GROUND
WIND DESIGN
SUBJECT TO DAMAGE FROM
SEISMIC
WINTER
ICE BARRIER
AIR
FLOOD
MEAN
Wind-
SNOW
Speed°
Speed'
Topographic
borne
DESIGN Frost
DESIGN
UNDERLAYMENT
FREEZING
HAZARDS'
ANNUAL
LOAD
(mphJ
��"
wind
debris
Weathers line Termlle`
CATEGORY' �°
TELAP°
RE4UIRED"
INDEX'
TEMW
ion'
region
zone"
depth'
Zero
110
No
No
No
Dz
Negligible
12" to 24"
Very Heavy
43
No
Sw Footo— g
0
60
Section 3. Filing
The Development Services Department shall file copies of Ordinance No. with the
California Building Standards Commission and Department of Housing and Community
Development pursuant to law.
Section 4. Severability.
If any section, subsection, sentence, clause, phrase or portion of this Ordinance is for any
reason held out to be invalid or unconstitutional by the decision of any court of competent
jurisdiction, such decision shall not affect the validity of the remaining portions of this
ordinance. The City Council of the City of Costa Mesa hereby declares that it would have
adopted this ordinance and each section, subsection, sentence, clause, phrase or portion
thereof irrespective of the fact that any one or more sections, subsection, sentence
clause, phrases or portions be declared valid or unconstitutionally.
Section 5. Inconsistencies.
Any provision of the Costa Mesa Municipal Code or appendices thereto inconsistent
with the provisions of the Ordinance, to the extent of such inconsistencies and no
further, are repealed or modified to that extent necessary to affect the provisions of this
Ordinance.
Section 6. Effective date.
This Ordinance shall become effective on the earliest date allowed by law.
Corfiinn 7
The City Clerk shall certify the adoption of this Ordinance and shall cause the same to
be posted or published in the manner as required by law.
APPROVED AND ADOPTED on this day of January, 2017.
Katrina Foley, Mayor
ATTEST:
Brenda Green
City Clerk
I, BRENDA GREEN, CITY CLERK of the City of Costa Mesa, California, do hereby
certify that the foregoing urgency ordinance was regularly introduced and adopted by
the City Council of the City of Costa Mesa, California, at a regular meeting thereof held
on the day of , 2017, by the following vote of the City Council:
AYES:
NOES:
ABSENT:
ABSTAIN:
APPROVED AS TO FORM:
Tom Duarte
City Attorney