I am looking for a nice closed back and plexi faced shot glass cabinet building plan I have seen them for sale but I can't seem to find the plans to make them.
I think Sri Vidya Rajgopalan has given the correct answer. But the Answer is very long. Let me explain you in short. Ram built a Bridge instead of ship because he thought, if in the war with Ravana more army of Varana is required then it will be easy to bring reinforcement through a Bridge Than to send ship.
You could easily use it as a design inspiration then determine the dimensions to suit your use. It should be a simple project for any woodworker with some experience.