Midrexâs primary business is direct reduction ironmaking. We build DRI plants that work day in and day out, year after. year to provide value for our clients so that they can make. the most of their investment and maximize their profits for. years to come. The MIDREXÂ® Process 2. The MIDREXÂ® Process.
Quick Answer. The maximum interior height of an entry door threshold is 1/2 inch, and up to 3/4 inch on exterior siding doors where it is essential to keep water out, as stated by the United States Access Board. These height limits improve wheelchair access to buildings.
ADA 404.2.3 Clear Width. Door openings shall provide a clear width of 32 inches (815 mm) minimum Clear openings of doorways with swinging doors shall be. measured between the face of the door and the stop, with the door open. 90 degrees Openings more than 24 inches (610 mm) deep shall provide.