I'm wanting to build a room that will allow me to use a video projector from the rear of the screen. The problem is that I want to be able to use the room for other things such a storage. What I need help on is calculating the most efficent way of using the room height, width and length without blocking the projector and pathway to the screen.

I plan on building the room with the following dimensions.

Length 18 feet
Width 12 feet
Height 12 feet

The following are the parameters I plan on using with
an epson powerlite S-1 projector

Distance from front of projector to screen is 16 feet

Width of video is 11 feet

Height of video is 9 feet

The important part will be the height in the room below the projection that I can use.

:P