The cost of pumping concrete for a large building foundation mat can be minimized in several ways:
- Minimize the amount of pipeline that must be laid out on the mat. If you can, eliminate it completely.
- Locate booms so they do not have to be moved during the day's pour.
- Have a backup pump onsite ready to use in case a pump breaks down.
- 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.