Section R11-1-1832. Seals shall be of substantial construction

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Seals shall be of substantial construction. Exposed surfaces shall be made of fire-resistant material such as gunite-covered wood or material, asbestos sheeting, masonry, concrete or reinforced con- crete, and steel or covered steel. If a commodity mined is combusti- ble, seals should be made of incombustible material.

Historical Note

Former Rule 18:32.

                    
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