Employees engaged in roof bolting in unstable ground shall use stulls and headboards to protect themselves until such time as the bolts are installed and properly tightened.
Ariz. Admin. Code § R11-1-1207
Employees engaged in roof bolting in unstable ground shall use stulls and headboards to protect themselves until such time as the bolts are installed and properly tightened.
Ariz. Admin. Code § R11-1-1207