The Forum, which opened in 1967, was designed by Charles Luckman Associates. The circular building features an exterior arcade of white columns that rise up to support a reinforced concrete compression ring. The roof, approximately 407 ft in diameter, is suspended from the compression ring, allowing for an open space free of interior supports. The building was used sparingly from 1999, when the Los Angeles Lakers and Kings began playing at the Staples Center, until 2012 when The Madison Square Garden Company acquired the venue. As part of a comprehensive rehabilitation and renovation project, SGH designed a replacement roofing system for this significant structure.