2400 Market Street Renovation and Vertical Expansion

Adaptive re-use of buildings is commonplace. For this project in Philadelphia, PA, The Harman Group and the Varenhorst/Gensler architectural design team were challenged with adapting a turn of the century, occupied, five-story concrete automobile warehouse building with diagonal column grids and 40-inch-diameter columns into functional office/retail space. Additionally, while occupied, the team had to complete a five-story steel framed overbuild; cut out the existing concrete core; rebuild two lateral concrete cores supported on hundreds of micro-piles; remove a column supporting 1,700 kips of load; and, insert a 6,000-square-foot atrium and a new full building length promenade for an incredible experience on the urban waterfront. …