Architect: Goldstein Hill & West Architects, LLP
Acoustical Consultant: AKRF, Inc.
The developer of this 60-story apartment building approached Midwest Curtainwalls with a challenge: design a curtainwall system that would insulate tenants from the noise associated with the elevated subway tracks that pass along the building’s north side. The City of New York mandated an exceptionally high acoustical performance requirement of 37 dB(A) or more on the north wall of the building, as well as 10 feet into the east and west walls, and 35 dB(A) or more for the remainder of the building.
Midwest designed sound-blocking gaskets, replaced aluminum parts with plastic, polystyrene and PVC parts, and filled the cavities in the aluminum frame assemblies with mineral wool insulation to block the sound transmission from the outside to the interior. Within three months, Midwest took mock-ups of the curtainwall units to Architectural Testing Inc. in York, PA, to test for sound transmission as per ASTM E90. The resultant solution per the test results was that the entire curtainwall system would have a minimum attenuation rating of 37 dB(A), which was an impressive accomplishment for the whole team.