Q: What choices do I have in the purchase of a truck scale? A: Above-ground or in-ground: In-ground scales are suspended inside of a concrete pit and are generally at grade. Above-ground scales are set on piers with approach ramps. They are generally 9" to 12" above grade. Steel deck or Concrete deck: The cost of steel is relatively high in today's market. Steel decks are generally heavier to ship than components for concrete decks.