I have a small bedroom and two single beds on ensemble. I want to fit them in the corner in an L shape but on top of each other. This means part of one bed will go underneath the other one. My local hardware shop said i need very strong platform to support the top bed. I dont have the skills but a thought came to me that I can use a dinning table as the platform. Its strong and will not collapse. Does anyone have another solution?
Kids being kids this is a bad idea. Without any means of locking the bed on the table it will slide off and someone will get hurt. One lower cost option is to check craigslist and see if someone needs to swap some bunk beds for regular twins. I admit it would be a long shot but eventually someones kids has grow out of them.
I don't quite follow how a dining room table would fit in to this equation. Typically beds can be turned into bunk beds by fastening the bestposts together. Whether your beds can handle that structurally, I don't know.
I have done the L-bed thing with a pair of Ikea beds, though. Maybe this gives you some ideas:
I got a whole bunch of 2x2s and Simpson L and U brackets, along with a saw, screws and bolts.