...dedicated to the science that unites aesthetic purity, structural integrity and functionality... 715.848.8677 Photo Courtesy of City of Chicago O’Hare Airport, Chicago, Illinois Guthrie Theater, Minneapolis, Minnesota • Product features • Applications • Performance • Interfacement with other trades • Critical application conditions      WJH&A will work closely with clients to provide technical product information that captures special features and unique applications regarding the products tested performance.   Technical Guides