Manning Speaks at Conference

May 15, 2015 – On May 20, Elizabeth Manning of MBJ’s Preservation Engineering Group will be presenting a paper at the 12th North American Masonry Conference in Denver, CO, May 17-20. Her paper, co-authored with Luis F. Ramos and Francisco M. Fernandes is entitled “Indirect Sonic Wave Velocity in Masonry Under Compressive Stress.” Sonic pulse velocity testing is a widely used non-destructive test method in the investigation of unreinforced historic masonry structures. The relationship between the sonic velocity in masonry and the compressive stress level in the masonry is being studied at the University of Minho in Portugal, where Elizabeth is a PhD candidate. Her presentation reports and describes results of indirect sonic velocity tests performed on masonry wallets as they were compressed to different stress levels. The full paper is available upon request after the conference by e-mailing Elizabeth at