Parkway 301 (formerly The Shenandoah Building)

By reusing the existing structure, the team preserved the building and history while adapting the space into functional apartments and retail suites that meet modern demands.  As the structural engineer, SGH needed to understand the existing structure, which lacked documentation.  We conducted a condition assessment of accessible portions of the existing structure while it was partially occupied and designed structural modifications to accommodate components of the new design, including the addition of a full-height egress stair that penetrates the existing floor structures at every level.

SGH also tackled challenges associated with the discovery of deteriorated steel girders that transfer load from the 1920s steel-framed structure to the original reinforced concrete structure below and spalled concrete spandrel beams.  We designed repairs that included new transfer girders within the building envelope two levels below and required the contractor to preload the new girders to limit building deflections during transfer of the building weight.   By working closely with the construction team to develop repairs for the transfer girders and spalled spandrel beams that optimized construction efficiency, the contractor was able to revise the construction schedule to successfully implement quality repairs and deliver the project on time.