Water and Wastewater Terms Beginning S

A B C D E F G H I J K L M N O P Q R S T U V W Y Z

shield

(1) A fabricated, protective crib made of steel or aluminum plate. The shield is placed on the bottom of open trenches in unstable soil areas where conventional protective shoring is not sufficient. From inside the shield, workers can safely install or repair pipelines. (2) A device used to protect workers from sources of electrical, mechanical, or heat energy.