Do you have a floor above your basement or crawl space that is sagging or bouncy? Fix it right and forever with Power Posts - it’s not automatic, it’s strong! Permanent adjustable support posts. Engineered to exceed residential building code. (This is not a temporary jack.) Use to support wood or steel beams. Available in two base styles allowing you the flexibility of using either Pre-Cast footer blocks or Poured-in-Place footers.