The Los Angeles Memorial Coliseum is a nationally recognized historic landmark stadium facility and has held two Olympic Games. NYA provided structural engineering services for the renovation and seismic upgrade of the entire Coliseum structure, added an 8-story steel-framed press box and suite tower (approx. 500,000 sf), ancillary buildings, and lowered the field to extend seating. Historic preservation of the exterior façade was a requirement of the strengthening and addition work.

The most important visual and architectural element, the Peristyle, was strengthened with a creative center-cored method from the roof down into the large existing concrete piers without impacting its original aesthetic or programmed spaces. Seismic strengthening work was done during the off-season on a fast-track schedule in spite of a general lack of existing structural building documentation. The press and suite tower addition was partially constructed during the football season with incremental construction stages studied to maintain continuous seismic safety for the occupied stadium.

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