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When overhead loads are being lowered into trenches, trench workers can be protected by?

User Buchanora
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The workers can be protected by "trench box". Trench shields which are known as Trench Boxes or Trench Sheets as well, are steel or aluminum structures utilized for securing utility laborers while playing out their obligations inside a trench. They are generally developed with sidewalls of changing thicknesses held separated by steel or aluminum spreaders.

User Howserss
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