This information is provided free of charge by the Department of Industrial Relations
from its web site at www.dir.ca.gov. These regulations are for the
convenience of the user and no representation or warranty is made that the information
is current or accurate. See full disclaimer at http://www.dir.ca.gov/od_pub/disclaimer.html.
Subchapter 17. Mine Safety Orders
Article 12. Ground Control
§6991. Bearing Sets.
(a) Bearing sets shall be installed in all vertical shafts and in all inclined shafts where it is necessary to support the shaft timbers.
(b) Bearing sets shall be installed as close to the shaft collar as is practical, and along the shaft at necessary intervals.
It is recommended that the distance between bearing sets be not more than 100 feet.
Go Back to the Mine Safety Orders, Article 12 Table of Contents