Pumping booms move concrete quickly and efficiently for placements such as high-rise decks, base mats, walls, and bridge decks. But placing crews working in the area beneath the boom must take special precautions to ensure safe pump placements. Rules each crew member should follow include wearing the proper protective gear, watching the boom as it's moving, attaching a safety cable or chain to the discharge hose, and never trying to kink the discharge hose to stop concrete flow.