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 while conserving building materials and energy. CBT's activities support the building technology program of the federal, state, and local government; assist design professions, building officials, and the research community by developing design criteria that improve buildings; and assist manufacturers of building products by developing criteria for evaluating innovative building materials. The report summarizes CBT's research for calendar year 1975. Each summary lists the project title, its progress, point of contact within CBT, and sponsor. The summaries presented in this report are arranged by subject-matter categories to group like projects. (Author/MLF)