Mechanical Power Transmission Apparatus Guarding
Under many circumstances, metal is the best material for guards.
Guard framework is usually made from structural shapes, pipe, bar, or rod stock. Filler material generally is expanded or perforated or solid sheet metal or wire mesh. It may be feasible to use plastic or safety glass where visibility is required.
Guards made of wood generally are not recommended because of their flammability and lack of durability and strength. However, in areas where corrosive materials are present, wooden guards may be the better choice.
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5-5. Which of the following may be the best material for machine safeguards if corrosive materials are present?
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