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.
1 Contribution. The standard width for the average entry door in America is 36.  That is not including the frame.   ADA requires 32 clearance when door is open 90 degrees , which  resâ¦ults in using a 36 door due to the thickness of the door and  projections from the jambs.   Interior doors range in width from 24-32 in even-number  increments.