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2015FallShotcreteEMag

Nozzleman Knowledge Fig. 2: A great example of a thrust chain setup elbows under the clamps is often overlooked. Misalignment through movement of the pumping system during pumping can put a huge strain on the components at the rear of the pump (refer to Fig. 2). Defense Surging with a rubber hose needs to be closely monitored; when positioned over a concrete curb or a sharp rock, friction can quickly wear a hole through the rubber hose and the hose can then Fig. 3: This hose quickly wore down against a burst under pressure. Rubber hoses can “walk off” concrete corner and burst scaffolding, causing great injury to the nozzleman, finishers, and other nearby construction workers. The use of a scaffold hook is a simple way to make sure this does not happen. It is easily adjust- able anywhere on the length of the hose to give the nozzleman the range he/she needs to work. Use several hooks if necessary to hold the weight of the hose while moving along the scaffolding (refer to Fig. 3). Final Drive Metal system parts wear from everyday use. Be sure to thoroughly inspect all parts on a daily basis.1 Another great way to ensure the opera- tor’s safety is with the use of an elbow shield or blowout protector on the main reducing elbow Fig. 4: This elbow failed due to excessive force at the rear of the pump (refer to Fig. 4). The being transmitted by the pumping system Shotcrete • Fall 2015 35


2015FallShotcreteEMag
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