Raths, Raths & Johnson, Inc. (RRJ) is a nationally recognized engineering, architecture, and forensics consulting firm that provides investigative, design, repair, and testing services for building structures, enclosures, and materials. With a professional staff of structural engineers, architects, and field / laboratory technicians, RRJ employs an evaluation methodology that combines an in depth knowledge of building sciences and construction materials with the firm's analytical and testing capabilities to deliver an integrated approach to assess and resolve structural, architectural and building system behavior and performance issues. RRJ's structural engineering and architectural expert services are augmented by its private laboratory and field testing capabilities. RRJ performs tests from ASTM standards to specific, customized methods including façade systems and curtain wall components, structural elements and components, and construction materials.