If you don't mind performing a little surgery, you can fold the box spring in half, making it much easier to move around. After rebuilding it, the box spring will still have all the structural integrity and support that it started out with. Here's what you'll need:
- flathead screwdriver
- Wood Saw
- Rope, cord, or twine
- Power drill/screwdriver
- Wood screws
- Some lumber that's the same thickness as your box spring's wood; 1x2's are probably good. You need enough to make four boards that span the four central crosspieces.
- Staple gun or upholstery tacks and a hammer
Step 1: Remove the staples on the long sides
Once you're done, the fabric shouldn't be attached to the wood frame at all on both long sides.
Step 2: Cut the dust cover and frame
Moving the top fabric out of the way, saw through the wood frame on each side. Your box spring is finally flexible! If all you need is to be able to bend it around a corner, you can skip the next step.