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.
The 6/8 stands for 6â²-8â³ tall and the 3/0 stands for 3â²-0â³ wide. Therefore the rough opening would be 82-1/2â³ tall by 38-1/2â³ wide. 82-1/2 inches also happens to be the standard âheader heightâ for windows and doors. If youâre a novice framer then this is the height of the BOTTOM of the window and door headers.This is also the top of the jack studs.2-1/2 inches also happens to be the standard âheader heightâ for windows and doors. If youâre a novice framer then this is the height of the BOTTOM of the window and door headers. This is also the top of the jack studs.