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.
Regardless of the size of the door, the Australian Standard AS 1428.1 (Design for access and mobility, Part 1: General requirements for access) recommends that the height of the handle should fall within 900mm and 1100mm above the floor. This is around waist height for the average adult.