We picked up a free mattress and box spring from Kijiji the other day as we are having relatives over to our new house in a couple of weeks. On it's own, that was ok except the mattress would be to close to the ground and would be very uncomfortable to get into or out of. So I built a bed frame for the box spring to sit on. Here's how I did it.
Step 1: Materials and measurements
Next buy your materials. I'm using construction grade 2 by 4s. They look ugly, but that doesn't matter as my wife will tack a skirt round the box spring and frame to make the whole thing look pretty. They are strong enough to build houses from, so they should be able to withstand building made into a bed. You will need:
7 x 2 by 4s
1 box of 3 inch screws (and if you want to, a drill bit to drill pilot holes. I didn't but I'm lazy that way)
1 piece of plyboard big enough to cover the headboard.
Also, you will need
1 1/2 inch drill bit
1 screwdriver. You will probably find a power screwdriver/drill is the way to go.