There will be radio communication beet ween the safety watch & site safety supervisor.As supplement to radio communications an air horn or portable siren will be used by the workers inside the confined space to alert the safety watch in case of an emergency .Where possible a life line will run from the access / egress point to the location of the workers to felicitate rescue operations.Where practical ,each worker will wear harness attached to the life line facilitate efficient rescue operations.Trained personal out side the confined space will aid an rescue operations.
Protective system
Protective systems are the methods of excavation will be decided with the situation and class of soil. Required for excavations 4 feet or greater in depth. Protective system refers to a method of protecting employees from cave ins from materiel that could fall or roll from an excavation face or in to an excavation and from the collapse of adjacent structures. Protective system iuncludes support systems, sloping ,benching,shielding systems and other systems that provide the necessary protection.
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