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.
Dimensions of a Standard Door. In the U.S., the standard door size is 36 inches by 80 inches or 0.91 meter by 2.03 meters. In some areas, the usual door size is 1.2 meters by 2.1 meters, which is widely used in comfort rooms, bedrooms as well as in main entries. The width of doors is 0.8 meters or more, depending on the purpose.