Commercial Architecture June 2019 - 30
▲
| exteriors
PROJECT
Students
Won't Miss
Jet Noise
New school designed
to meet strict acoustic
standards.
W
hen children spill into classrooms
at the newly completed Des Moines
Elementary School in Washington
state, one thing will be missing: the deafening roar of
jet engines landing at nearby Seattle-Tacoma International Airport (SeaTac).
The school replaces a building originally construct-
ed in 1925. To give the elementary school a solid
Washington feel, local talent was brought in to design
and build the project. Hutteball + Oremus Architec-
Above. GP's DensElement barrier system and Prosoco R-Guard FastFlash were used on the walls of the Des Moines, WA, elementary school.
Below. Because the elementary school lies directly in the flight path of Seattle's SeaTac airport, noise mitigation, as it related to the wall and roof
assembly, was among the top concerns.
ture, Kirkland, WA, designed the new school, with
Ingrida Sanders acting as designer and project manager. Absher Construction, Puyallup, WA, was the general contractor.
Because the new school lies directly in the SeaTac
fligh, noise mitigation, as it related to the wall and roof
assembly, moved to the top of the list of concerns.
Products and design needed to be chosen and integrated in such a way that ongoing air traffic wouldn't disrupt daily learning and Washington's notoriously
rough weather would be kept at bay.
"This is the first time we'd designed a project to
meet strict noise standards," Sanders explained. "All
the products we specified for the building envelope,
from sheathing to glazing to roof board, had to meet
certain Sound Transmission Class (STC) ratings to
meet health department administrative code and Federal Aviation Administration (FAA) requirements."
During the research phase of the design process,
a single manufacturer so we knew they would be com-
was easy. "It's suited for weather protection and mold
Sanders realized that two of the products on which she
patible. And, it was an easier process during the pro-
and fire resistance," she said.
was focusing were manufactured by the same compa-
curement stage," she said. GP calls the product mix
ny: Georgia-Pacific (GP), Atlanta.
Dens Solutions.
To achieve the desired STC rating of 49, three 1/2in. layers of the roof board were specified to cover the
"The idea of specifying such an envelope was
Since Sanders had specified GP DensDeck Prime
roof 's deck. "Our acoustical consultant recommended
attractive and beneficial for the project in multiple
roof board on multiple past projects, the decision to
we use at least two layers of 5/8-in. roof board, but we
ways. It was nice to have all of the products come from
incorporate it into the Des Moines building envelope
decided to use three 1/2-in. layers to ensure the stu-
30
JUNE 2019
COMMERCI A L A RCHI T EC T UREM AG A ZINE.COM
Commercial Architecture June 2019
Table of Contents for the Digital Edition of Commercial Architecture June 2019
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Commercial Architecture June 2019 - Cover2
Commercial Architecture June 2019 - 1
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