Seahawks Headquarters and Training Facilities

Renton, WA

Vulcan Inc.



SSA Acoustics was brought on the team to assist in developing guidelines and solutions to control noise and vibration from the proposed mechanical equipment. Equipment included rooftop air handlers, relief fans and horizontal fan coil units.


There were two challenges for this project. The first was related to a series of 20 relief fans serving the indoor field. When in full operation the fans can produce over 100 dBA. Secondly, the rooftop units were mounted on lightweight roofing system without mass to prevent intrusive sound in spaces below.


To control noise from the fans alternative units were selected that can reduce noise by 50%. To control noise from the rooftop we coordinated with the structural engineer to find methods to add mass to the roof deck to block sound.