HomeMy WebLinkAbout1981-08-04; City Council; 6700; Proposed Design Standards for Energy ConservationK
AGENDA BILL
INITIAL: JC• r
AGENDA
BILL N0: 6ZO O w D=. 'FAD.
DATE: AUGUST 4, 1981 CTY. ATTY.
DEPARTMENT: CITY ENERGY CO„MITTEE CTY. MGR.
SUBJECT:
PROPOSED DESIGN STANDARDS FOR ENERGY CONSERVATION
STATEMENT OF THE -MATTER:
This item is a resolution adopting standards encouraging passive solar design.
This resolution is designed to implement the Subdivision Map Act which requires
consideration of passive heating and cooling opportunities when designing
subdivisions.
ENVIRONMENTAL REVIEW
The Planning Director has determined that this project will not have any
significant environmental impacts and has issued a Negative Declaration. The
Negative Declaration is attached to the related ordinance on energy and will
require City Council action.
FISCAL IMPACT
There will be costs to the city associated with staff titre necessary to
implement the standards. It is expected that the demands c>n staff time will
decrease as staff and applicants become more familiar with the standards. Also
the procedure for implementing the standards, which is also attached, has been
set up to minimize costs to both the city and the applicant. It is not
expected that adopting standards for passive heating and cooling will increase
the cost of housing.
RFC r, MT;TMATTnN
The City Energy Committee recommends that the City Council approve Resolution
NO. sl (&39 • and by Motion approve the Negative fieclaration.
ATTACHMENTS
1) Memo to City Manager, dated July 21, 1981
2) Resolution No. G._.3
3) Steps in site plan review for passive heating and cooling opportunities.
4) The initial environment study is on file in the Planning Department.
ARBOVED
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MEMORANDUM
DATE: July 21, 1981
TO: Frank Aleshire, City Manager
FROM: Chairman, City Energy Committee
SUBJECT: DESIGN'STANDARDS FOR•ENERGY CONSERVATION IN SUBDIVISION
This item is a resolution setting standards by which
subdivisions should be designed in order to fully utilize passive
heating and cooling opportunities. The Subdivision Map Act
requires a consideration of such design features. The State
Attorney General's Office has already contacted the city to
inquire about the city's implementation plans.
It must be stressed that these standards represent the ideal for
passive heating and cooling. Obviously, topography and/or
existing land uses may prevent attainment of the ideal for some
sites. This resolution is an attempt to clearly define what is
expected so that both staff and the applicant work from the same
base.
The resolution was reviewed by the Planning Commission as an
informational item. Two commissioners were strongly opposed to
any mandating of energy conservation. The remaining
commissioners expressed varying degrees of support and proposed
several changes. One commissioner stated that the item should
be reviewed thorough.iy by the construction industry. Therefore,
copies were sent to a list of builders supplied by the Building
Department. The builders were asked to submit written comments
and were invited to attend the Council meeting.
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STEPS IN SITE PLAN REVIEW FOR PASSIVE HEATING
AND COOLING OPPORTUNITIES
STEP I: Early Inquiry/Informal Review
1. Standard checklist and information handed out
with each application or inquiry.
STEP II: Application
1. *Checklist of data that must be included in
an application to be considered complete.
Map
Map may be a copy of the subdivision or
site plan map with the appropriate
information included. If no subdivision or
site plan map exists, then a similar map at
a reasonable scale may be substituted.
This map must contain the following:
• Existing and proposed site topography
with 5-10 ft. contour intervals.
° Location, type and height of existing
and proposed vegetation and
structures.
° Topographic data for lands to the
immediate south of the site to
determine if solar shading results.
° Proposed lot lines, street grades and
alignments and building sites or
buildable areas on each lot.
Text
° Description of methods (easements,
covenants, design review, etc.) proposed
to provide solar orientation of building
and use to provide the use of solar
energy systems for space conditioning and
water heating.
Description of how current design
increases the amount of solar access or
the percentage of lots with solar access
and solar orientation.If current design
does not increase solar access or lots
with solar access and orientation, an
explanation of why design does not
provide such opportunities and why
alternatives were not used must be
included in text.
STEP III:
Description of exceptions requested from
solar access and orientation standards and
justification for the requested exceptions.
Public Hearings
1. Staff report will include a section on Energy
Analysis which will indicate which standards
are met by development
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1 RESOLUTION NO: 6639
2 AN RESOLUTION OF THE CITY COUNCIL OF THE
CITY OF CARLSBAD, CALIFORNIA, ADOPTING
3 STANDARDS TO ENCOURAGE SOLAR AND CLIMATIC
DESIGN APPROACHES'IN NEW'SUBDIVISIONS
4
WHEREAS, the residents of the city of Carlsbad face the
5 uncertainty of continued supplies of conventional energy sources
and the certainty of rapid cost increases for such sources as a
6 result of the scarcity and the lack of new production and
generation facilities for conventional energy sources; and
WHEREAS, the City Council of the city of Carlsbad
8 recognizes that the conservation of fossil fuels used in the
construction, and use of new buildings, necessary to reduce the
9 need for new energy production facilities and conserve existing
supplies for other essential uses; and
10
WHEREAS, there is a clear Federal and State policy to
11 promote the maximum utilization of solar and other renewable
forms of energy;
12 NOW, THEREFORE, BE IT RESOLVED that the City Council of
13•the city of Carlsbad does hereby adopt the following Solar
14 Design of Subdivisions Checklist and Standards:
3.5
Checklist Standards
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1. " " Street Orientation
17 1.1 Optimum direction of Streets For single family
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for Solar Exposure.
detached homes -
preference should be
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toward the predominance
of east -west streets so
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that building lots may
be organized north-
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south to facilitF �e
south wall or roof
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solar exposure.
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1.2 Optimum Direction of Streets
Preference should be
for Ventilation.
toward orientation of
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streets so as to
facilitate breezes.
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Street Widths for Energy
Conservation.
Conditions for Exceptions
Lot Pattern and Configuration
.1 Optimum Organization of Lots
for Solar Exposure.
.2 Requirement for Lot
Organization.
° Preference for single
family detached homes
should be toward
minimum east -west
street widths
consistent with
emergency and safety
consideration and
toward provision of
south wall and roof for
solar exposure.
° Topographic conditions
on or surrounding the
land being subdivided
preclude the ability to
orient streets east -
west to facilitate
south wall or roof
solar exposure.
° The configuration of
the property being
subdivided precludes
the ability to orient
streets east -west.
° Existing road patterns
contiguous to the
property being
subdivided preclude the
ability to orient
streets east -west.
° Specific adverse
environmental impacts
on the property being
subdivided would occur
if the preferred street
orientation were
achieved.
° For single family
detached homes
preference should be
toward the organization
of the long axes of
lots north -south.
° The maximum number of
lots should have their
long axes oriented in a
north -south direction.
For optimum orientation
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of lots, the maximum
number should be
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oriented with their
'long axes within +30
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degrees of true south.
2.3
Conditions for Exceptions
•° Topographic conditions
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on or surrounding the
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land being subdivided
preclude the ability to
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orient lots properly.
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° The configuration of the
property being
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subdivided precludes the
ability to orient lots
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properly.
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The nature of existing
or permitted future
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development contiguous
to the subject property
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precludes adequate solar
exposure to specific
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lots.
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Patterns achievable on
the property to be
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subdivided or
contiguous to this
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property preclude the
ability to orient lots
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properly.
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° Specific adverse
environmental impacts
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would occur if the
preferred lot
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orientation were used.
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° Demonstration of
commitment to proper
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orientation of
buildings regardless of
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lotting pattern or
orientation.
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3.
Building -Foundation Plan or
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Siting -Plan:
The developer shall
attempt to locate the
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3.1
Siting of Building for Solar
maximum number of
Exposure.
buildings on portions
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of lots identified as
having adequate solar
exposure.
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3.2 Siting of Building for Wind
Protection and Ventilation.
3.3 Building Axis -Orientation
3.4 Conditions for Exceptions
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20 4.---Landscaping
21 4.1 The Use of Landscaping for
Shading.
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24 4.2 Landscaping to Maximize
25 Solar Access.
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° The developer shall
attempt to locate the
,maximum number of
buildings on lots so as
to take optimum
advantage of summer
breezes and to be
protected from exposure
to winter winds.
° The maximum number of
buil l—ng-s should be
oriented with their
long axes within +45
degrees of east -west.
Topographic conditions
or vegetation required
for preservation
preclude the ability to.
orient the long axes of
buildings within +45
degrees of east -west.
° The configuration of
the lots preclude
proper orientation of
buildings.
° The nature of existing
or permitted future
development contiguous
to the lots preclude -
adequate solar
exposure.
Existing or proposed
landscaping at maturity
shall attempt to
provide the maximum
amount of shading of
paved streets.
Landscaping should be
located and species
selected to minimize
shading of south facing
roofs and walls to
maximize shading of
west facing roofs and
walls.
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1 4.3 The Use of Landscaping for
Managing Winds.
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5. Open Space
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5.1 Location of Open Spaces
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. 5.2 Location of Open Spaces
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° Landscaping should be
used to screen
buildings and outdoor
living areas from
winter winds.
Landscaping should be
used to channel summer
breezes to buildings
and outdoor living
areas during summer
months.
Open space should be
located toward true
south side of a lot as
a means of protecting
solar exposure to the
dwelling units that are
served.
° When the property to be
subdivided abuts an
area developed with or
designated in the
zoning map for the
development of mid or
high-rise structures
will be developed in
the subdivision, the
location.of open space
should be such that.it
will provide buildings
for solar exposure
located to the south of
the taller structures.
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PASSED AND ADOPTED at a regular meeting of said City.
2
Council held on the 4th day of August . 1981 by the
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following vote, to wit:
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AYES: Council Members Casler, Anear, Lewis and Kulchin
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NOES: None
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ABSENT: Council Fkn-ber Packard
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ABSTAIN,: Nome
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10 RONALD G. PACKARD, Mayor
DIARY H. CASLER, Vice -Mayor
11 TTEST:
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14 LETHA L. RAUTENKRANZ, City Clert
(SEAL)
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