This is merely a demo version to see how they would work in game. They will be remodeled and retextured later on.
The main idea behind these was that they could be used along with scripting
that allows enemies to open doors. Probably something like adding force to a door when enemies collide with an area in front of it could work. So if you have the option to bar the door you would be inclined to use that option.
Oh, and don't mind the bad cropping and lack of sound in the video. Haven't found decent video capturing/editing tools that work on linux yet.