at the same time working professionals, students and teachers, all before being licensed or graduating. Both continued to teach and be associated with USC for many years. In 1961 Calvin Straub left the practice to teach architecture at Arizona State University. Buff and Hensman continued their partnership as Buff, Hensman and Associates. Conrad Buff died in 1989 and Dennis Smith joined the partnership the same year to form Buff, Smith and Hensman, from which Hensman retired in 1998. Smith carries on in the practice, located in Pasadena. The Buff, Straub, and Hensman firm's masterwork was Case Study House #20, the Saul Bass House (Altadena, 1958). It was built of factory-produced stressed skin panels and plywood vaults. Despite thorough engineering calculations, the architects were not awarded a building permit until a sample plywood vault had been temporarily erected and loaded with weights. Its open plan introduced the concept of zoning: the owner's zone with studio office, garden, master bedroom & bath; a formal zone with living and dining rooms and entry atrium; a family zone with kitchen, family room, dining terrace, two additional bedrooms and swimming pool. Architect Calvin Straub's own post-and-beam home in Pasadena was another project that brought the practice commissions. Significant projects 1956 Mello Residence, Pasadena 1958 Saul Bass Residence (Case Study House #20B), Altadena 1959 Frank Residence, Pasadena 1961 John Thomson Residence 1962 Sidney Fine Residence 1962 Residence for Mr.Steve McQueen, Los Angeles 1963 Residence for Mr & Mrs Marcus Whiffen, Phoenix Az. 1963 Harry Roth Residence, Beverly Hills Penn/Walter Van der Kamp Residence, Los Angeles 1965 Case Study House #28 1967 M.C. Gill Residence, Pasadena 1968 Renovation for Judge Sandra Day O'Connor 1969 Laurence Harvey Residence, Palm Springs California 1983 Harry Dorsey Residence, Playa del Rey, AIA Pasadena and Foothill Chapter, Award of Merit 1984 Sources Case Study Houses by: Elizabeth Smith, Peter Goessel (ed). Taschen, February, 2002 , edited by Robert Winter, University of California Press,1997 References External links A Case Study in the Mechanics of Fame: Buff, Straub & Hensman, Julius Shulman, Esther McCoy and Case Study House No. 20 (January 7, 2010) at Southern California Architectural History Buff & Hensman: An Annotated and Illustrated Bibliography (2010), uncorrected proof to page 51 at Southern California Architectural History Buff's House, Still Shining". Chris Iovenko. Los Angeles Times. December 13, 2007. Retrieved 2013-07-01. Conrad Buff III at Library of Congress Authorities (with no works in the