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Barricades are objects placed across roads or open spaces to stop people. There are two types - hard barricades, which must support 90kg of force and be 0.95-1.15m high, and soft barricades, which are only suitable as short-term warnings. Barricades are needed for excavation work, which involves removing soil or rock using tools or machinery, to form holes or cavities and occurs on construction sites, business premises, and public areas, posing hazards like collapsing soil, underground utility lines, falling in, and flooding.

















