Many colleges don't allow students to take the school-supplied bed or bed springs out of the room and some require that they be incorporated into the design of any loft bed that is used. Here are a few options for how to accomplish this with your OP Loftbed loft bed:
Option #1: Instead of using plywood for a mattress platform, use the existing springs instead. You will need something to support the springs, so build two more center mattress supports and install them near the head and foot of the bed. This will give you three supports for the existing springs. Be sure to measure your springs before fabricating the pieces of your loft bed to make sure that they will fit inside the mattress supports. For a twin OP Loftbed, the springs must measure less than 74″x37″. For a twin extra long OP Loftbed, the springs must measure less than 79″x37″. It’s also possible to make your loft bed a little bigger to accommodate springs that measure more than this.
Option #2: Just set the springs from the bed in your room on top of the mattress platform. You could possibly use a router and create slots in the mattress platform for the legs of the existing bed to go through. This will also decrease the amount of unused space between the springs and the mattress platform.
Option #3: Replace the 2x6 and plywood mattress platform entirely -- bolt the springs directly to the legs of your loft bed. Please read our blog post with pictures and more information to help you with this method.