100% of the building's steel shelf angles were replaced as they were rusting and the anchors to the concrete frame were rusting.
Mast Climbers were used to perform this work at the north and south elevations. Swing-stages were used for the shorter east and west elevations.
To stop existing building leak issues and to protect the new steel from future deterioration, all replaced steel was flashed with a membrane flashing.
Built in the late 1950s, this 24 Story high rise residential building had suffered from water infiltration issues. Structural engineering studies revealed that not only were the supporting steel shelf angles un-flashed and prone to water infiltration, but the angles were inadequately secured to the building's structural concrete frame. Working with the building's engineering consultant – Klein and Hoffman, Inc. – Central implemented a two year program to replace the majority of the steel shelf angles with properly detailed and flashed angles that have helped to virtually eliminate the building's water infiltration issues. In conjunction with the steel replacement, Central completely re-caulked the window perimeter joints, extending the useful life of the building's first generation windows.
The repairs were performed under an accelerated schedule to minimize the overall disruption to the building's residents. Furthermore, Central erected mast climbers in lieu of standard swing stage scaffolding which allowed the continual use of the building's prominent roof deck for the enjoyment of its residents.