The original single-pane, wood-framed curtain walls had wood rot and poor air/water infiltration performance. SGH developed a rehabilitation plan to install new aluminum curtain walls mimicking the distinctive, deep mullion of the original curtain walls. We prepared construction documents for replacing approximately 65 curtain walls (more than 600 lites) along with the limestone above the curtain walls and providing perimeter flashing to improve the water/air infiltration. We consulted on roof repairs related to a new penthouse, as well.
SGH also designed structural modifications and new structures associated with the interior renovations, including the following:
Structural support for a new limited use/limited application elevator between the fifth and sixth floors with a suspended elevator pit
Structural framing supporting a thirty-six-ton air handler unit in the roof
New covered walkways at the roof for mechanical access
Miscellaneous slab openings and infill floor framing
Support for architectural elements, including operable partitions, cantilevered desks, and long-span countertops
SGH worked closely with the contractor during the design and construction phases to address unforeseen field conditions efficiently, helping them meet the aggressive project schedule.