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How to put supports under a bed box spring

Updated February 21, 2017

Without proper support in your bed frame, your mattress and box spring may shift or sag. This can make for an uncomfortable night's sleep and certainly isn't good for your back. You can add support slats between the bed rails or beneath your box spring for added stability. Slats can be purchased, but you can just as easily cut your own.

Remove the box spring from the bed frame.

Measure the width of the frame between the left and right bed rails to determine how long the support slats must be.

Cut the bed slats from ¾-by-3-inch lumber. You'll want enough slats to space them around 4 inches apart within the bed frame.

Lay the wooden slats across the left rail, centre support beam and right rail. If the frame allows it, you can screw the slats in place to improve stability.

Replace the box spring in the bed frame.

Things You'll Need

  • Measuring tape
  • Saw
  • ¾-by-3-inch lumber
  • Screws
  • Drill
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About the Author

J.S. Copper began writing professionally in 2008, specializing in technology, running and health-related topics. He has worked with a handful of technology websites providing tutorials, tips and tricks. Prior to writing, Copper worked in Web design