Simple Box Design

[bb12x]

I am trying to build a ported sub box. The maximum room I have is 8.25 inches high, 18 inches wide, and 46.5 inches long. I want it tuned to about 32hz. It is going to hold one 12" sub. The sub needs to face up and the port needs to face to the side. Can anyone give me dimensions for the box or even a diagram? Thanks. -Bryan