Breaking ground on March 22, 2010, the Nashville Music City Center is a landmark one-of-a-kind convention center built to serve the greater Nashville community and to provide a prominent hub for visitors touring "Music City, USA." The building sits on a sixteen acre site and features a 350,000 SF exhibit hall, a 57,000 SF grand ballroom, 90,000 SF of meeting room space, 32 loading docks, and parking for 1,800 vehicles. The building also features a 360,000 gallon retention tank for run off water used to irrigate the building's exterior landscaping and four acre green roof as well as its plumbing needs.
One of the building's unique features is the exterior, undulating soffit assembly or āeyebrowā, around the building perimeter, that varies in width up to 60 ft. and is 150 ft. above exterior grade. Exterior ceilings on the eyebrow were installed off of 150 ft. booms with leveling mats; over an exterior ābelly wallā ceiling that had to be installed off a suspended quick deck cantilever system. This feature was one of the biggest trials for the ceiling the installation team. The metal panels forming the soffit had to create a curved surface in two directions requiring strict tolerances for hangers and panels to avoid excessive twisting and oil-canning of the panels. The curvilinear ceilings inside the entrance were designed to follow the same lines as the exterior eyebrow, another beautiful but challenging installation.
Moving to the grand ballroom the architect designed a one-of-a-kind aluminum panel ceiling system, with real wood veneered onto it, which curves downward as it approaches the walls and continues vertically downward to match up with wood wall panels being installed by the millwork subcontractor. Installation of the 40 ft. high ceiling was complicated and required construction of a 90 ft. x 90 ft. rolling scaffold tower in order to erect it.
Coordinating structure, infrastructure, and finishes for this project was a monumental task. Hundreds of hours were spent creating BIM models of the finishes and interfaces of ceilings and walls. Many on-site coordination meetings were held to review build conditions and make modifications to improve appearance and/or ease of installation. Even so, structural and MEP conflicts in the main lobby required scan analysis and subsequent re-engineering and field modifications to provide required clearances and to align wall and ceiling reveals.
Acousti's main role in the project was to provide and install acoustical and custom metal ceiling and wall panels, for the interior and exterior of this 2.1 million square foot project. Because many of the ceilings/walls are undulating in three dimensions, one of our largest responsibilities was customizing the support systems to create curved surfaces from flat panels. Coordination with all other trades was also highly demanding since the custom ceilings/walls were at heights varying from twenty to one hundred and fifty feet. One significant test was the acquisition of custom materials in a timely manner. Also, since a large percentage of the panels were 'one of' units, there was a lot of mis-manufacturing. Much of our work was modifying panels in field to make them fit so we did not have to wait for new ones to be made.
Acousti surpassed rigorous engineering needs behind complex geometries and unimaginable heights to make Music City Center's guitar shaped appearance distinguish itself from all other convention centers in the country. We installed approximately 150,000 square feet of exterior metal panels with woodgrain laminate on curved soffits mimicking the rolling Tennessee hills one hundred and fifty feet above grade. Behind every metal pan and acoustical ceiling, there was an engineered calculation accounting for wind uplift to maintain structural integrity and provide a safe ceiling system, none of which could have been done without Acousti's longstanding expertise. Having worked on many mega-projects in the past, we had the management team and skilled mechanics to complete whatever work as required and had the necessary bonding capacity and financial strength to complete the job. Other hurdles faced on this project included extended lead times for custom made materials, constant out-of-sequence work, and factoring for temperature extremes. Coordinating the multiple design colors, materials, geometries involving acoustical products, wood veneer on aluminum, Serante veneer on aluminum, and painted steel coil, all mimicking real wood, also had its own challenges. Nashville Music City Center is opened early 2013, and the convention center will stand as a point of pride for both the city it serves as well as Acousti's accomplishments to date. Sector: Convention Centers
GC: Bell/Clark and Harmony Joint Venture
Architect: Thompson, Ventulett, and Stainback Associates (Atlanta, GA); Moody Nolan, Inc.
Work: Exterior Linear Metal Ceiling, Cherry Grain, Painted 150,000 sfInterior Linear Metal Ceiling, Cherry Grain, Painted 45,000 sfStained Beech Laminated to Linear Metal Ceiling 40,000 sfStained Beech Laminated to Metal Wall Panels 10,000 sfStained Beech Laminated to Custom Formed Ceiling and Wall Panels 60,000 sfBarz Ceiling Panels 60,000 sf Standard Acoustical Ceiling 420,000 sf
Awards: CISCA 2012 Contractor's Award; CISCA Gold Construction Excellence Award