By now you have seen, or at least heard of, floor Flatness (FF) and levelness (FL) specifications. If you haven't had an opportunity to construct a slab to FF/FL specifications, you may wonder what steps are required to produce floors that pass the test (ASTM E 1155). A common specification for industrial applications with moderate to heavy vehicular traffic is FF35/FL25. The following 10 steps have proven successful in achieving this level of quality.

  1. Setting Edge Forms
  2. Concrete Placement
  3. Strikeoff
  4. Bull Float
  5. Restraighten
  6. Waiting Period
  7. Machine Float
  8. Restraighten
  9. Machine Trowel
  10. Measuring