Raths, Raths & Johnson, Inc. (RRJ), was established in 1966 and maintains one centrally located office of thirty-five employees that assists clients nationwide. We provide specialized engineering and architectural services for investigation, repair, and restoration of damaged and deteriorated existing structures of all material types.

Unique to RRJ is our laboratory and library facilities. Prototype and component testing for research, investigation, and design verification is performed in-house or in the field with instrumentation via a comprehensive data acquisition system. Our library facility contains historical volumes dating back to the 1960s including building codes and manufacturer’s data. This historical data is invaluable in analyzing older structures.

RRJ’s staff of licensed engineers, registered architects, CAD technicians, lab/field testing technicians, and office support personnel has evaluated thousands of structures. Knowledge gained from this experience is shared with the technical community through involvement in professional organizations and committees. Key to our methodology is that a Principal is involved in every project.

See our Services page for more detailed information.