ULTIMATE STRENGTH TESTS OF POST-TENSIONED FLAT PLATES

Following the collapse of the Four Seasons Apartment Building in the Anchorage, Alaska, earthquake of 1964, many questions arose regarding the adequacy of post-tensioned flat plates, particularly those erected by the lift-slab technique. As a result of these questions and a general lack of validated test information on post-tensioned construction of this type, the American BBR Research Association was formed in 1964 for the sole purpose of research and development in the field of post-tensioned concrete. Membership was divided into two groups: