How to build a custom spring-under leaf spring suspension and box the frame of a vintage 1948 Willys pickup at home.

If you build the frame too small, friction can cause the wooden frame to rub right through the fabric on the box spring and mattress. Plus, a tight fit makes it much harder to change the sheets.

Like mattresses, box springs should be cleaned periodically to get rid of all the dust and under-the-bed debris that have accumulated over the years. Here’s how to do that. What is a box spring?