Worksafe Victoria, The Health and Safety Executive, and Manitowoc have issued a Safety Alert about faulty tower spigots on K600 and K800 tower sections following two known mast section failures.
The warning follows two catastrophic spigot failures, one in Chicago in February 2009 and one in London this April. The failure, which starts as a small crack, is thought to be due to inadequate heat treatment.
If a tower crane mast fails and collapses there is potential for multiple fatalities.
Read the warning here.