The original single-pane, wood-framed curtain walls suffered from wood rot and air/water infiltration. SGH developed a rehabilitation plan to install new aluminum curtain walls mimicking the distinct, deep mullion of the original curtain walls. We prepared construction documents for replacing sixty-five curtain walls (more than 600 lites) along with limestone above the curtain walls, and providing perimeter flashing to improve performance. 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 infill floor framing and slab openings, some requiring strengthening with carbon-fiber reinforced polymer around the openings
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.