The ACEC Wisconsin Chapter awarded raSmith a Best of State Engineering Excellence award for the UW-Madison project. raSmith was then invited to submit the project for recognition by the national ACEC organization. The Hamel Music Center was recognized again, this time with a national Honor Award for Engineering Excellence.
Due to the COVID-19 pandemic, winning projects will be honored at award ceremonies to be held later this year.
Acoustics and sound isolation in the university’s new Hamel Music Center needed to be top tier for the performances. Space for rehearsing was also required. raSmith’s structural engineers faced the challenges of isolating sound stemming from busy vehicular and pedestrian traffic on University Avenue, doors opening and closing, lobby chatter, loud HVAC systems, and music played in adjacent halls. The building’s concert, recital and rehearsal halls, and the lobby needed to be isolated from one another, like a vault for acoustics.
The overall structural design that worked perfectly when addressing acoustical requirements was the approach of placing three separate buildings within one large overall building. The recital and rehearsal halls were self-supporting and isolated from the main lobby to the overall building and required support space. The walls surrounding the recital and rehearsal halls were completed with double-wall construction. A standard nut, washer, and bolt assembly, with the additions of a neoprene washer, neoprene bushing, and neoprene bearing pad, were used as part of an acoustical isolation joint. Hundreds of these joints were used to isolate the framing outside of the concert hall. The neoprene addition to the joint served as an insulating piece that absorbs any potential vibrations from adjacent walls.
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The concert hall also uses an acoustical coffer system, a series of strategically sized and strategically placed circles (some concave or some partially or fully hollow) that line its walls. While these sizable circles provide sound treatment, absorbing and reflecting it, the system fits in with the rest of the hall’s aesthetics. Reverberation chambers on both sides of the stage, where sound actually passes through, are hidden from sight. Almost 15 public transportation buses could fit within each of the hall’s chambers.
