The cost of pumping concrete for a large building foundation mat can be minimized in several ways:

  1. Minimize the amount of pipeline that must be laid out on the mat. If you can, eliminate it completely.
  2. Locate booms so they do not have to be moved during the day's pour.
  3. Have a backup pump onsite ready to use in case a pump breaks down.
  4. Keep the traffic path of ready mix trucks as unobstructed as possible.

These are the guidelines the concrete contractor followed in pumping the 6,000-cubic yard mat for the Marriott Hotel in Century City, California. Three pumps were used to pump the 4.5- to 5.5-foot-thick mat: one with a 138-foot boom and two pumps with 170.5-foot booms. At the time, the two large pumps were the largest pumps in the world.