Barriere built nine large diameter concrete ring walls for IMTT. The construction required constant communication and coordination between Barriere and IMTT’s safety department. A challenge Barriere overcame was the ring wall tops were not flat and required two different sized chamfer edges and no point on the walls could vary ¼” from spec. To achieve a higher level of quality and to complete the work efficiently, Barriere created many custom tools for construction.