DFW Door & Hardware LP is a recognized member of Intertek's Certified Machiner Program, allowing them to modify Intertek Certified Fire Doors and Frames as detailed within the applicable Intertek specification listings, DFW Door & Hardware LP’s site, 1173 - 113th Street, Grand Prairie, TX 75050, is subject to routine inspections to verify that modifications to Intertek Certified Fire Doors and Frames are done in compliance with the requirements of the Intertek specification listings.