The Center for Building Technology (CBT) provides the technical and scientific bases for criteria and standards that improve the usefulness, safety, and economy of buildings. CBT research also aims at conserving building materials and energy. Individual projects may emphasize one or more of the center's typical activities in providing improved knowledge, in usable form, to the building community. Typical activities include problem analysis to define and characterize needs for improved building practices; research to obtain vital new knowledge, technical problem solving to develop improved practices from the best available knowledge; dissemination of results to users in the building community; and impact analysis to show how well the center's work has met the building community's needs and whether elements of the original problem remain unresolved or new problems exist. This report summarizes CBT's research for calendar year 1976. Each summary lists the project title, its progress, point of contact within CBT, and sponsor. This report supersedes the 1976 edition of SP446, which covered the 1975 CBT projects. (Author)