...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 • Windload charts • Attachment spacing • Product selection • Application preference • Fabrication requirements Design Guidelines WJH&A will work closely with clients to provide illustrated design guidelines compiled from product performance test reports, structural calculations and product standards to produce general dimensional guidelines to assist estimators, contractors and architects on product selection and application.