Mich. Admin. Code R. 408.41483 - Caissons used under pressure
Rule 1483.
(1)
A caisson used under pressure shall be subjected to a hydrostatic test equal to
200% of the working pressure before being used on a job, at which pressure it
shall be tight. The caisson shall be stamped on the outside shell about 12
inches from each flange to show the pressure to which it has been
subjected.
(2) All caissons that
have a diameter or side greater than 10 feet shall be provided with a man lock
and shaft for the exclusive use of employees. In addition to the gauge in the
locks, an accurate gauge shall be maintained on the outer and inner side of
each bulkhead. These gauges shall be accessible at all times and kept in
accurate working order.
(3) In
caisson operations where employees are exposed to compressed air working
environments, employers shall comply with Occupational Health Standard Part 665
"Underground Construction, Caissons, Cofferdams, and Compressed Air," as
referenced in
R
408.41410.
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
No prior version found.