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American Concrete Pumping Association Safety Manual Concrete

ACPA American Concrete Pumping Association New Safety ...

Mar 05 2009 · AMerican Concrete Pumping Association Safety Bulletin Contractors may sometimes require or request their concrete pumping company to use a double âSâ shaped steel elbow or other metal devices when pouring concrete â Figure 1. The purpose of these devices is to prevent concrete from falling out of the boom pipeline by the force of gravity.

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