The SoBro Roundabout is slated for a dramatically curving residential skyscraper that Nashville-based development company Giarratana is proposing would rise 45 stories. The eye-catching building would be bathed in aluminum and glass and sit on an unusually shaped lot at 800 Lea Ave., near the Music City Center and other existing towers and planned high-rises. As designed, the building will rise 610 feet, making it the tallest occupiable structure in Tennessee were it standing today and eclipsing Giarratana’s 505, which rises 535 feet at Fifth Avenue North and Church Street. Led by founder Tony Giarratana, Giarratana (the company) has submitted its plans to the Metro Development and Housing Agency. The document notes Chicago-based Goettsch Partners is the architect, with Barge Design Solutions of Nashville handling land planning and engineering work.