The document provides an overview of a project for JP Morgan Chase involving the replacement of four roof mounted chillers at their Aldermanbury location over a 6 month period from January to June 2011. As the main contractor, Trinity Environmental Services completed the 贈2 million project, which required extensive crane lifts over 8 weekends. The critical aspects of the work involved the logistics of transporting materials and plant to the roof given road closures, and rerouting live mechanical and electrical services while minimizing downtime. Trinity incorporated builders work, steel work, screens, scaffolding and craneage into the project and worked closely with all parties to deliver the project on schedule without issues.