FRANCIS D.K. CHING is one of the leading authorities on architectural design drawing around the world. His numerous bestselling works have been translated into over seventeen languages and are regarded as classics for their renowned graphic presentation. He is Professor Emeritus at the University of Washington in Seattle.

STEVEN R. WINKEL, FAIA, PE, CASp is a registered architect, civil engineer and landscape architect and is a California Certified Access Specialist. He managed the San Francisco Bay Area office of The Preview Group, Inc. for fifteen years and now has his own code consulting practice. He was the Architect Member of the California Building Standards Commission for eighteen years and served on the Board of Directors of the National Institute of Building Sciences.