The project comprises two volumes linked on the ground floor only. A three-storey, central core block houses clerical and executive offices. The second volume, on four floors, contains public spaces for the employees, a multipurpose hall, and some services. Sculptural treatment of the stair wells, various stepped and cantilevered volumes, and a wide range of exterior surface treatments contrast with the office block. The principal structural system is a reinforced concrete frame, cast in-situ.