Page 60 - The Engineering Guide to LEED-New Construction Sustainable Construction for Engineers

LEED Sustainable Sites 41

Community Center; 21) Fitness Center; 22) Museum. Proximity is determined by drawing
a ½ mile radius around the main building entrance on a site map and counting the
services within the radius. (Typically the service provided by the proposed project may
not be included, except for mixed-use projects, for which one of the project services may
count toward the minimum 10 in LEED 2009. In addition, LEED 2009 allows for two
“anticipated” services within the radius to count, if there is proof they will be operational
within a year of occupancy of the project. Note that any service not specifically as listed
in the requirements will be considered only on a case-by-case basis.)
Potential Technologies and Strategies
During the site selection process, give preference to urban sites with pedestrian access to a
variety of services.

Calculations and Considerations
Option 1 The submittal requirements for Option 1 of this credit have several calculations
associated with them. The minimum development density must be met both for the site
in question (the development density of the site DD ) and for the surrounding area (the
site
development density of the surrounding area DD ) that is within the density boundary
area
(DB) as defined by the density radius (DR). The following set of symbols is used in the
equations, with GFA referring to gross floor area as defined through the errata as posted
by the USGBC in the spring of 2007 (see the definitions in App. B):

A Total land area of the project lot or site
T
A Total land area of a lot i
Ti
DD Development density of the site [usually given in square foot per acre (ft /acre)]
2
site
DD Development density of the area within the density boundary as determined
area
by the density radius for the density boundary
DDD Development density of double the surrounding area as determined by the
area
density radius for double (DRD) the density boundary area (EP point
variable)
DR Density radius for the density boundary area (usually given in feet)
DRD Density radius for double the density boundary area (usually given in feet)
(EP point variable)
GFA Gross floor area of building associated with lot i (square feet)
i
GFA Gross floor area of the subject project (square feet)
P
One point can be earned for Option 1 if the inequalities in Eqs. (2.2.1) and (2.2.2) are
true, given the definition of the density radius in Eq. (2.2.3):

2
DD = (GFA /A ) ≥ 60,000 ft /acre (2.2.1)
site P T
∑ GFA
DDarea = i ≥ 60 000, ft /acre for all applicable buildings
2
∑
AT
and lots within DR including
i
the subject project (2.2.2)
DR = 3 × AT (2.2.3)