The Rigged-Up Net

Why do the entry doors to most homes open inward, while in most public buildings, the entry doors open outward?

The basic doorway in your home has a very simple structure: A large board is attached to a frame using a few “pin” hinges. This design has a number of advantages — it is easy to build, easy to install and easy to repair. Of course, it is also very easy to disassemble — removing the hinge pins completely detaches the door from the frame.