Case Study: Locating Hidden Headers Behind Masonry Facade of 13-Story Building, New York City

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Problem: How to locate hidden headers behind brick facing (solid links binding the brick facade to the structure behind it). No headers had been found where portions of facing had fallen away from building, but invasive examination had verified the presence of headers in other areas

Results: Impact-Echo was used in exploratory tests to determine presence or absence of hidden headers.

Verification: Brick facing removed in test areas to verify impact-echo results.

Outcome: Impact-Echo tests were 100% accurate in determining the presence or absence of hidden headers. The method was recommended as part of testing and rehabilitation program for the building facade.