HomeMy WebLinkAboutItem #10-Heat Island Non Roof- PAB_9.16.09PLANNING FACT SHEET
LEGISTAR FILE ID: 09-00954zt September 16, 2009 Item # P.10
APPLICANT Pedro G. Hernandez, City Manager on behalf of the City of
Miami
REQUEST/LOCATION Citywide
LEGAL DESCRIPTION See supporting documentation
PETITION A Resolution of the Miami Planning Advisory Board
recommending approval or denial of an ordinance of the
Miami City Commission amending Article 9 of Ordinance
No. 11000, the Zoning Code of the City of Miami, Florida, to
create Section 952 entitled "Heat Island Effect — Non Roof'
to add sections to provide for environmentally responsible
methods for cooling and shading of hardscapes in City of
Miami; containing a severability clause; and providing for
an effective date.
PLANNING RECOMMENDATION APPROVAL
BACKGROUND AND ANALYSIS
PLANNING ADVISORY BOARD
CITY COMMISSION
This ordinance is intended to reduce the heat island effect
in the City of Miami by requiring that at least 50% of the
hardscape surfaces (1) use reflective hardscape materials,
(2) provide shading for hardscapes within 5 years, (3) use
vegetative paving systems, or (4) some combination of the
above.
VOTE:
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CITY OF MIAMI • PLANNING DEPARTMENT
444 SW 2ND AVENUE, 3RD FLOOR • MIAMI, FLORIDA, 33130
PHONE (305) 416-1500
....................................................................................................................................................................................................................................................................................................................................
Date Printed: 9/3/2009 Page 1
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City of Miami
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Legislation
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PAB Resolution
File Number: 09-00954zt
City Hall
3500 Pan American
Drive
Miami, FL 33133
www.miamigov.com
Final Action Date:
A RESOLUTION OF THE MIAMI PLANNING ADVISORY BOARD
RECOMMENDING APPROVAL OR DENIAL OF AN ORDINANCE OF THE MIAMI
CITY COMMISSION AMENDING ARTICLE 9 OF ORDINANCE NO. 11000, THE
ZONING CODE OF THE CITY OF MIAMI, FLORIDA, TO CREATE SECTION 952
ENTITLED "HEAT ISLAND EFFECT - NON ROOF" TO ADD SECTIONS TO
PROVIDE FOR ENVIRONMENTALLY RESPONSIBLE METHODS FOR COOLING
AND SHADING OF HARDSCAPES IN CITY OF MIAMI, CONTAINING A
SEVERABILITY CLAUSE, AND PROVIDING FOR AN EFFECTIVE DATE.
WHEREAS, The City of Miami is committed to reducing elevated temperatures and associated
air-quality issues stemming from urban heat island effects; and
WHEREAS, during the past eight (8) years, the City of Miami ("City") has launched a
comprehensive and aggressive environmental program to clean streets, waterways, brownfields, storm
drains, and to improve air and water quality; and
WHEREAS, the City Commission has adopted the recommendations of MiPlan, the City of
Miami Climate Action Plan, which promotes various methods to achieve reduction in energy
consumption which is adversely affected by elevated temperatures in the urban -core; and
WHEREAS, elevated temperatures from heat island effects in urban areas result in increased
energy consumption for cooling; increased greenhouse gas emission associated with building and
vehicle usage; and deterioration in air quality; and
WHEREAS, hardscape management methods, such as tree planting, shading, and use of
reflective paving materials, will contribute to decreasing the urban heat island effect, which can reduce
the energy consumption of City buildings;
WHEREAS, the Miami Planning Advisory Board, at its meeting held on September 16, 2009,
Item No. P.10, following and advertised public hearing, adopted Resolution No. PAB by a vote
of to (_ _), recommending approval as presented.
NOW, THEREFORE, BE IT ORDAINED BY THE COMMISSION OF THE CITY OF MIAMI,
FLORIDA, AS FOLLOWS:
Section 1. The recitals and findings in the Preamble to this ordinance are adopted by reference
and incorporated as if fully set forth in this Section.
Section 2. Article 9 of Ordinance No. 11000, the zoning code of the City of Miami, Florida, to
create section 952 entitled "Heat Island Effect - Non -Roof' is amended in the following particulars:
"ARTICLE 9. GENERAL AND SUPPLEMENTARY REGULATIONS
Cite of _Miami Page I of 4 Printed On: 91312009
File Number: 09-00954zt
Section 952. Heat Island Effect - Non -Roof
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The requirements of this ordinance are intended to reduce the heat island effect from hardscapes
in the City of Miami and to consequently reduce energy consumption and bills for buildings within the
City.
952.2 Definitions
Hardscape means the nonliving portions of a building's landscaping, such as roads, sidewalks,
courtyards and parking lots
Heat island effect is an elevated temperature over an urban area when compared to rural areas.
typically caused by the increased presence of dark, heat absorbing materials, such as asphalt and
dark roofs, in urban areas.
Solar reflectance is the fraction of solar energy reflected by a material.
Pervious Pavement System is a porous surface system with a stabilized base that allows water from
precipitation and other sources to pass directly through, thereby reducing the runoff
<http://en.wikil2edia.org/wiki/Surface_runoff> from a site, allowing groundwater recharge
<http://en.wikipedia.org/wiki/Groundwater recharge>, and naturally cooling the surface through
evaporation of water from pavement voids or from beneath.
952.3 Applicability
The provisions of this ordinance are applicable to newly constructed building after the effective
date of this ordinance and located in the Citv of Miami. The followina are exempted from the
requirements of this ordinance:
(a) Renovations or repairs of the landscaping or hardscape of an existing building.
952.3 Solar reflectance
Solar reflectance shall be determined as follows:
(a) For roofing materials, all roof exterior surfaces and building materials used to comply
with Section 952.4 shall have a minimum solar reflectance as specified in Sections
952.4 when (i) tested in accordance with ASTM E903 or ASTM El 918. (ii) tested with a
portable reflectometer at near ambient conditions. (iii) labeled by the Cool Roof Ratina
Council, or (iv) labeled as an Energy Star qualified roof product. Any product that has
been rated by the Cool Roof Rating Council or by Energy Star shall display a label
verifying the rating of the product.
For paving materials, all paving materials used to comply with Section 952.4 shall have
a minimum solar reflectance as specified in Sections 952.4 when (i) tested in
accordance with ASTM E903 or ASTM E1918, (ii) tested with a portable reflectometer
at near ambient conditions. or (iii) default values of solar reflectance for listed materials
may be used as follows
City of Miami Page 2 of 4 Printed On: 9/3/2009
File Number: 09-00954zt
TABLE INSET:
Material
Solar Reflectance
Typical new gray concrete
0.35
Typical weather gray concrete
0.20
Typical new white concrete
0.70
Typical weathered white concrete
0.40
New asphalt
0.05
Weathered asphalt
0.10
952.4 Requirements
Sites with new construction shall be required to comply with the following:
(a) Provide any combination of the following strategies for fifty percent (50%) of the site
hardscape:
Shade from solar panels or roofing materials with a solar reflectance of at least 0.30
J[L Shade from trees within five (5) years of occupancy
iii Paving materials with a solar reflectance of at least 0.30
iv Pervious pavement system
OR
Place a minimum of fifty -percent (50%) of parking spaces under cover (defined as
underground, under deck, under roof, or under building). Any roof used to shade or cover
oarkina must have a solar reflectance of at least 0.30.
Section 3. If any section, part of section, paragraph, clause, phrase or word of this Ordinance
is declared invalid, the remaining provisions of this Ordinance shall not be affected.
Section 4. This Ordinance shall become effective ten (10) days after approval at second reading,
unless vetoed by the Mayor within ten days from the date it was passed and adopted. If the Mayor
vetoes this Ordinance, it shall become effective immediately upon override of the veto by the City
Commission. {2}
Footnotes:
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File Number: 09-00954zt
{1 } Words and/or figures stricken through shall be deleted. Underscored words and/or figures shall
be added. The remaining provisions are now in effect and remain unchanged. Asterisks indicate
omitted and unchanged material.
{2} This Ordinance shall become effective as specified herein unless vetoed by the Mayor within ten
days from the date it was passed and adopted. If the Mayor vetoes this Ordinance, it shall become
effective immediately upon override of the veto by the City Commission or upon the effective date
stated herein, whichever is later.
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