As much art as they are science, structural seismic renovations strike a balance between preserving historic aesthetics and subtly incorporating modern elements that improve safety and performance and extend the life span of a structure. Inadequate existing structural systems, ageing materials, and the unknowns inherent in old and undocumented buildings combine to make retrofits some of the most challenging engineering work there is. Through careful coordination with architects in evaluation and design of existing structures, along with responsiveness to and collaboration with contractors during construction, Lund Opsahl brings clarity to a complex process that yields rewarding results, whether your building is Beaux-Arts or Mid-Century Modern.