Drills on columns shall be anchored firmly before drilling is started and shall be retightened frequently thereafter.
4 Va. Admin. Code § 25-40-3550
Statutory Authority
§§ 45.1-161.3 and 45.1-161.294 of the Code of Virginia.
Drills on columns shall be anchored firmly before drilling is started and shall be retightened frequently thereafter.
4 Va. Admin. Code § 25-40-3550
Statutory Authority
§§ 45.1-161.3 and 45.1-161.294 of the Code of Virginia.