**What material should be used for the wheel guards/triangular braces used when unloading flammable and explosive chemicals from tank trucks?
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As the title suggests: **What material should be used for the wheel guards/triangular braces used when unloading flammable and explosive chemicals from tank trucks? Can iron be used?** Are there any relevant regulations? Will one made of iron move and cause sparks?
Triangular wood is generally wooden. Chemicals that are flammable and explosive should not be made of iron, as sparks could be generated.