{"data":{"id":"us-va/4vac25-40-3270","jurisdiction":"us-va","citation":"4VAC25-40-3270","heading":"Requirements for ventilation doors","body":"Ventilation doors shall be:\n\n1. Substantially constructed;\n\n2. Covered with fire-retardant material, if constructed of wood;\n\n3. Maintained in good condition;\n\n4. Self-closing, if manually operated; and\n\n5. Equipped with audible or visual warning devices, if mechanically operated.","path":["Title 4. Conservation And Natural Resources","Agency 25. Department of Energy","Chapter 40. Safety and Health Regulations for Mineral Mining","Part XV. Safety and Health Regulations—Underground Only","Article 3. Air Quality, Radiation and Physical Agents"],"source_url":"https://law.lis.virginia.gov/admincode/title4/agency25/chapter40/section3270/","current_through":"2026 Regular Session (effective July 1, 2026)","vintage":"","retrieved_at":"2026-09-14T04:46:04Z","sha256":"74dcd4cbb336d6bf858692adf3c3da3da143401e50ffb8fcdb37edb1c2e132a5","source_id":"us-va-vac","stale":false,"prev":"us-va/4vac25-40-3260","next":"us-va/4vac25-40-3280"},"notice":"GroundRules: Original legal text. Not legal advice."}