MR Credit 4.1/4.2 Recycled Content, RGA-200 Entrance
The RGA-200 entrance grating consists of a series of
parallel aluminum rails assembled using nylon spacers and threaded
rods such that openings are provided between rails to allow debris
to fall through into the recess below. The primary walking surface
is created by the sculpted shape of the aluminum profile extrusion.
The aluminum rails are cushioned from the flooring substrate by the
nylon spacers which occur every 12 between all rails.
The recycled content of this product is given as a
percentage calculated by comparing the weight of the product to the
weight of the recycled materials it contains. The net weight of the
matting is the sum total of the weights of the aluminum rails, nylon
spacers, and threaded rods. This product weighs 2.68 pounds per
square foot. This value is subject to variation due to the standard
manufacturing tolerances of the component parts. The aluminum, which
contains all of the recycled content, is approximately 2.38 pounds
per square foot or 88.8% of the total weight.
The aluminum can be further divided into
post-consumer and pre-consumer recycled content as follows:
In accordance with guidelines set forth in USGBC
LEED V2.2, the recycled content of the aluminum is:
Post-Consumer + 1/2 * Pre-Consumer = 10% +
1/2*60% = 40%
Applying this percentage to the aluminum, the
recycled content of the grating is 36% of the product by weight
((40%*2.38)/2.68 = 36%). This value may be applied to the project
cost of this product and added to similar values for the total
project in order to determine LEED credit applicability for MR
Credits 4.1 and 4.2.