Damaged Building Joint after Testing (IMAGE) University of Sheffield Caption This is the same building joint, following application of post tensioned metal straps and tested on shaking table to equivalent of magnitude 7 earthquake. Credit University of Sheffield Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.