Children’s Healthcare of Atlanta Renovation and Expansion
Walter P Moore provided structural engineering and full parking services (functional design, graphics and equipment) services for an expansion for Children’s Healthcare of Atlanta (CHOA) on the Egleston Campus. The five-story hospital addition was constructed above a new, four-story below grade parking structure.
Due to tight site constraints, a traditional retaining wall system was not allowed. A permanent earth retention system was constructed and built from the “top-down”. The roughly 340’x320’ footprint hole was excavated down 65’ over the course of six months before the construction of the superstructure could begin.
The parking structure and hospital expansion above were constructed using cast-in-place concrete. The one-way slab and beam system was not post-tensioned to allow for future floor modifications and to accommodate the many slab depressions common to medical facilities. An innovative curvilinear roof was constructed using structural steel for the four-story high open atrium entrance on the south end of the hospital.
In addition to the hospital expansion, Walter P Moore provided structural engineering services for a $50M renovation of the existing hospital facilities. A new six-story high connecting corridor structure was constructed on the south end of the existing hospital. Six structural steel columns were threaded through small openings in the existing structure to bridge over the existing lower three levels. The steel columns support several new structural steel-framed levels which connect the new expansion to the existing hospital.