The American Concrete Pavement Association’s (ACPA) guidelines require concrete pump outriggers to be placed not less than 1 foot away from a cut for each foot of a vertical excavation. For instance, if a vertical cut is 6 feet deep, the pump’s outriggers must be located at least 6 feet away mobile concrete mixer, maintaining 45 degrees of soil from the outrigger to the toe of the cut, referred to as the one-to-one rule. Extra distance may be required if soil conditions appear muddy, soft, or loose. If the outriggers rest on shoring, ask the soil engineer what soil pressures the shoring will support and what methods are needed to spread the outrigger loads for adequate support.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:concrete mixer machine,diesel concrete mixer,etc. We will provide you with the best product and service. Crew safety is part of the equation. Whenever a concrete pump is on a jobsite, be sure to have a person available to assist the operator when the pump truck is backing up. Identify the washout area and have a Storm Water Pollution Prevention Plan in place. When using a concrete pump, there is always the danger of hose whipping, and most often happened when air gets into placing lines. This can happen in many ways, such as when a pump stops and gravity allows concrete to free-fall from a line replacing the concrete with air, or when concrete in the hopper falls below the intake allowing air into the placing line. The air, under pressure when the pump starts pumping again, is compressed and may cause the placing hose to whip violently.