all of u happy independence day,we must try to help our nation for the development in the fields of culture industrial economical,social and environmental.this is our duty as a citizen.
Injury to workers during handling of materials. Hands or legs caught underneath loads.Burns ,electric shock during welding works and other hot works ,short cir cute & fire incide4nts. Collapse of cranes & other lifting equipments. Failiear of lifting tools & tackles. Eye injury due to falling particles during grinding,grit blasting & power brushing. Suffocation due to excessive smoke or dust during welding & blasting operations. Swinging of load and hitting on existing facilities during rigging operation in strong wind. Welders trapped underneath pipes during welding works -as support are moved. Back fire and explosion of compressed gasses during oxy -acetylene flame cutting. Hazards due to smoking in prohibited areas. Hazards due to bursting of pipe lines during hydro testing at high pressure range.
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.
Shoring is the provision of support system for trench faces used to prevent movement of soil.,under ground utilities,road ways and foundations.Shoring is used when the location or depth of the cut makes,slopping back to the maximum allowable slope-impractical. Shoring system consist of posts, wale , straits and sheeting. Three basic type of shoring's are : Timber. Hydrolic. Pneumatic.
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