The Structural Engineering Laboratory at the University of Michigan is well-equipped for structural testing of large-scale structural elements and subassemblies under monotonic and quasi-static cyclic loading. The principal element of our Laboratory is a strong wall and floor system which forms a continuous L-shaped corner. The strong floor is a 5-foot deep heavily reinforced concrete mat. The walls are 20 feet high and 2 feet thick, backed by 8-foot deep buttresses on 8-foot centers. Both the walls and the buttresses are post-tensioned to the strong floor.