Contractors: One of the things a contractor can do to help is to order the right size boom. If the boom is too small concrete mixers, the operator may have to set up too close to an excavation to reach the pour; if the boom is too large, it will require much more cribbing than a smaller unit; Have a place prepared for the pump before it arrives on the job; Inform the pump operator of backfilled areas, soft or muddy areas, or underground obstructions; Have cribbing near the setup area prior to the pump's arrival (including steel sheets if the soil is known to be bad); Monitor the setup. Don't let the operator cut corners or take chances.Henan Daswell Machinery Co., Ltd,is a professional manufacturer and trader specializing in the research, development and production of construction machinery for nearly 30 years. Our main products are as follows:mobile block making machine,mobile block machine,etc. We will provide you with the best product and service. Dispatcher: When the contractor calls to order the pump the dispatcher should: Learn the size of pump that is needed and send that size if possible; If availability means that a unit that is larger or smaller than necessary will be sent, warn of possible complications; Ask about soil conditions or underground obstructions. Operator: The operator is ultimately in charge and must make good decisions regarding setup, including: Use as much cribbing as practical; too much is better than too little; Watch for all warning signs prior to setup; Watch for sinking outriggers while unfolding the boom, and continue to recheck them throughout the day; Keep people out from under the boom whenever practical.