LEED Calculator Overview - National Precast Concrete Association

determinedenchiladaΠολεοδομικά Έργα

25 Νοε 2013 (πριν από 3 χρόνια και 6 μήνες)

74 εμφανίσεις


NPCA’s LEED Calculator


Overview

The LEED Calculator was developed by NPCA in order to simplify the
paperwork

requested for
the
completion of
LEED Credits
MR 4

and
MR5
.

Currently t
he LEED Calculator
’s Regional Materials

data
entered is only designed to

work for the United States version of LEED
,

because Canada offers multiple
possible

options beyond the typical 500
-
mile radius.

Precast Products


LEED 2009
-

New Construction

Credit Number

Credit Description

Max Points

MR Credit 4


Materials and
Resources

Recycled Content

1
-
2

Credit Requirement


United States

Use materials with recycled content.

weight of material postconsumer content + weight of ½
preconsumer

content = 10%

(1 point)

weight of material postconsumer content + weight of ½
preconsumer

content = 20%

(2 points)

Canada

weight of material postconsumer content + weight of ½
preconsumer

content =
7.5
%

(1 point)

weight of material postconsumer content + weight of ½
preconsumer

content =
15
%

(2 points)


Precast Contribution


Precast concrete
products
may contain supplementary cementitious materials such as
fly ash and blast furnace slag
,

which will add to the project’s recycled content goals.
Precast
concrete products
may also contain rebar and welded wire mesh
made from

recycled steel.


Precast Products


LEED 2009
-

New Construction

Credit Number

Credit Description

Max
Points

MR Credit 5


Materials and Resources

Regional Materials

1
-
2

Credit Requirement


United States

Use materials
or products that

have been extracted, harvested

and manufactured within
500 miles of the project site.

10%

(1 point)

20% (
2
points)

The calculation is based on the overall materials cost. Materials cost include
s

all
expenses to deliver the material to the project site.

Materials cost

should account for all
taxes and transportation costs incurred by the contractor but exclude any cost for labor
and equipment once the material has been delivered to the site.

Canada

LEED in Canada allows for
a choice in one of the three me
thods for obtaining regional
materials credit :



Use a minimum of 10% of building materials or products for which at least 80% of the mass is
extracted, processed and manufactured within 800

km (500 miles) of the project site.




Use a minimum of 10% of build
ing materials or products for which at least 80% of the mass is
extracted, processed and manufactured within 2
,
400

km (1,500 miles) of the project site, and
shipped by rail or water.




Use a minimum of 10% of building materials or products

that reflect a combination of the
above extraction, processing, manufacturing and shipping criteria (e.g. 5% within 800

km (500
miles) and 5% shipped by rail within 2
,
400

km (1,500 miles)
.

Credit 5.1 is worth 1 point for 10%.

Credit 5.2 is worth
1

point i
n addition to 5.1 for obtaining 20%


Precast Contribution


Because concrete uses plentiful and natural raw materials, concrete components can be
extracted, harvested and manufactured within 500 miles of the project site.


Directions and
Requirements


1.

Download

the
Recycled Content Request form

from NPCA for distribution to producers
of each component of your concrete.

This Microsoft word document can be easily
mo
dified and saved for future use.

Directions on how to add logos and modify the table
can be
found on the second page of the file.
Distribute these to the producers of your
precast component
and keep

these records on file
,

because the LEED AP (accredited
professional) will be asking for copies

to upload to Green Building Certification Institute
.

Y
ou will need the following information documented in writing:

a.

Cement



Pre Consumer content and Harvest location Zip Code.

b.

Coarse Aggregate

Post Consumer content

and Harvest Zip Code.

c.

Fine Aggregate



Post Consumer content and Harvest Zip Code.

d.

Rebar



Pre & Post Consumer content and Harvest Zip Code.

e.

Reinforcing Wire

Pre & Post Consumer content and Harvest Zip Code.

f.

Any SCM
s


Pre Consumer content and Harvest Zip Code.


2.

The goal is to have the overall weight of each component within the specific product.

If
you do not have the weight of each

component
,

you
must
calculate
it

working from your
mix design

data

and weights of your steel.

Multiply your mix design component weights
with your concrete yardage number for the specific weight of that component with
in
the product.


3.

Insert the values on the LEED calculator located at
http://leed.precast.org/


o

The first step is to register or log in.

If you have never registered for the LEED
calculator
,

you must do so because yo
ur NPCA member registration is separate
from the LEED Calculator.

o

Upon log
in select New Form.

o

Enter the Project information
.

o

Enter your company information.

o

Enter a Product Name and any ID numbers you may have.

o

Enter the product

s weight.

This is the
overall weight of the product delivered to
the job

site.

Once this information has been entered
,

save the document and
you are ready to edit the components.

o

Edit the Logo Information.
The ideal size is 280x60. The ideal type is jpg. It will be
converted
automatically but may look better if this criteria is met before upload.


Components

o

Edit the Cement Component. You can edit the name and add the cement type or
designation if you
wish
. Enter the weight of the cement used in the product.

One way to
determ
ine the

accurate
number is to multiply your mix design cement number by the
product yardage.

Using the information you gathered in writing from your cement supplier
,

enter the pre and post consumer information.


o

Enter the product

s Water Weight.

One way to

determine the accurate
number is to
multiply your water mix design by the concrete yardage.

Although water recycling on site is
a sustainable practice
,

the USGBC does not count this as recycled content in concrete.

o

Enter Aggregate Components. Unless you a
re using some recycled aggregate
such as
crushed concrete or recycled glass aggregate
,

leave the post consumer content at
zero.

o

Enter Reinforcing components.

Make sure you enter the pre and post recycled
content based on the information you gathered from y
our steel supplier(s).

Enter
the weight of the steel. If you do not have the weight
,

you can use the
I
nternet to
find the weight per foot of your steel and do a simple math calculation.

o

Enter any SCM components such as fly ash or slag.


o

Enter any other com
ponents that you may have.

For

example: You supply a steel
hatch for a
n

u
nderground utility product as
part of the
complete
delivered
assembly.


4.

The
total weight in the box should match the total weight listed in the product
information at the top of the
calculator.

Double check that all data has been entered
correctly.

If the weights do not match
,

a warning will appear.

The overall product weight
originally entered has no
e
ffect on the calculations


it
is there simply
to
provide a

verification
of
your co
mponent weights.

You can produce the pdf when the numbers are
not matching
,

but please verify that each component weight is correctly entered when
you receive the error.


5.

Your plant zip code must be within 500 miles of the project zip code entered
.

If the
material contains components that were sourced from a place within 500 miles but the
final assembly was farther away, the product cannot be counted toward the credit.

(
LEED 2009
,

page 380)


6.

Publish the PDF file, save it to your hard drive
and
proofread.


7.

Download the Recycled Content Response form for submission as a cover letter to the
LEED AP.

Modify the document as required or use it as a base for creating your own.


8.

Supply

the LEED AP with the Response
L
etter and all
pdf file
s of final analysis from th
e
LEED Calculator
that
the LEED AP
r
equested.

You should also include a copy of all
co
mponent
-
supplied documentation.



Please f
eel
f
ree to e
-
mail or call
Claude Goguen
, PE, LEED AP, Director of Technical Services

at
NPCA with any questions.


National Precast Concrete Association

1320 City Center Dr. Suite 200

Carmel, IN, 46032

(317)
571
-
9500

(phone)

(317) 571
-
0041 (fax)

www.precast.org

















LEED Calculator


Screen Shot
























LEED Calculator


Sample PDF