Testing specimens: View of five concrete columns with rods embedded through the center; column labeled AC-3 is broken while columns AT-2, AC-2, AT-1, and AC-1 display fissures at sites of stress/strain, 1960

Testing specimens: View of five concrete columns with rods embedded through the center; column labeled AC-3 is broken while columns AT-2, AC-2, AT-1, and AC-1 display fissures at sites of stress/strain, 1960, Item: 4734; Folder: 21.3; Box: 7. Negatives and Photographs of Fritz Engineering Laboratory Tests and Events, SC Photo 0013. Lehigh University Grant Projects. https://archivesspace.lib.lehigh.edu//repositories/7/archival_objects/75700 Accessed May 19, 2026.