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.
Door Specifications. ADA-compliant doors must be wide enough to accommodate wheelchairs. The law calls for entryways to be at least 32 inches wide, as measured between the door's face and the opposite doorstop when the door is open 90 degrees.Clearance around doors must be 36 inches.The law exempts doors that don't require full passage to access a room, such as an entryway into a closet less than 2 feet deep. The minimum width on such doors is 20 inches.For double doors, the minimum width is 48 inches, and the doors must swing in the same direction.he law exempts doors that don't require full passage to access a room, such as an entryway into a closet less than 2 feet deep. The minimum width on such doors is 20 inches. For double doors, the minimum width is 48 inches, and the doors must swing in the same direction.