Long-span structures are essential to facilities such as stadiums, convention centers, performing arts centers, airport terminals, and aircraft hangers, where unobstructed space is critical. Successful design of these elements requires a unique combination of expertise – shape optimization, economical connections, erection strategies, architectural sensitivity, and an intuitive sense of structural behavior. Martin/Martin’s long-span portfolio includes one of the longest – Bangkok International Airport: 689 feet – and one of the most sophisticated – the retractable roof at Chase Field – in the world.