August 5, 2014 (Sanford, Fla.)—Crane Institute of America announces the availability of the newest edition of the industry’s favorite rigging handbook. Rigging, by James Headley, has been converted from imperial to metric. Providing practical information and great illustrations, the Rigging Metric handbook contains the latest information on wire rope, rigging hardware, and slings, including capacity tables and charts.
“For years, the handbook Rigging has been popular outside the United States for use in training,” said Jim Headley, President of Crane Institute of America. “Customers in Canada, South America, Europe, Australia, and the Middle East have been asking for a metric version of the book.”
Along with the rated capacity tables of slings and rigging hardware, the book covers how to calculate load weight, how to calculate sling loading, and proper load handling techniques. The information is applicable to rigging operations no matter where you are in the world. By offering two versions of the books, trainers and students now have a resource that improves communication, understanding, and safety.
The book can be ordered at Crane Institute’s Online Store and costs $19.95 USD.
About the Author
James Headley has spent more than 40 years working in the crane and rigging industry. After serving a crane apprenticeship through Operating Engineers Local 312 in Birmingham, Ala., he worked as journeyman crane operator until entering the crane training business in 1984.
As President of Crane Institute of America, Jim has developed training programs for hundreds of major companies including aircraft manufacturers, oil and gas producers, utilities, and the military. For over 20 years, he served on U.S. standards boards–ASME B30 main committee on cranes and lifting devices, and sub-committees for cranes, slings, and rigging hardware. Presently he serves on the International Standards Organization (ISO) committee on cranes.
Headley is also...
Killed – two workers in California when their personnel basket fell nearly 80 feet.
OSHA has strict requirements regarding hoisting personnel. If these requirements are followed, such accidents should cease to happen. The actual cause of this particular accident is still unknown to the public as the OSHA report will take time to surface. Early speculation is that the hook failed or the basket came off the hook.
Hooks used in personnel hoisting operations “must be capable of supporting, without failure, at least five times the maximum intended load applied” according to OSHA 29 CFR 1926.1431(g)(3). In simple terms the hook will withstand a 500% overload before it will fail at which point it will bend, not break. On a crane as large as the one used in the operation, the weight of the heaviest personnel basket and its contents should not come close to the yield point of the hook.
This begs the other question, how could the master link for the bridle supporting the basket come off the hook?
OSHA requires hooks used for hoisting personnel “must be of a type that can be closed and locked” (1926.1431(g)(1)(i)(A)). Closing the hook’s throat would prevent the basket from coming off the hook. Now let’s assume the hook was not equipped with a latch or the latch was defective.
- The weight of the basket should keep the master link in place in the bowl of the hook.
- For the basket to come off, an upward force would have to be placed on the master link. This could cause the master link to slip over the hook tip.
- An upward force could be generated by hitting an object with the personnel basket.
Purchase Mobile Cranes and Rigging handbook set by Jim Headely and read...
Synthetic round, grommet or endless slings are stronger and even lighter than other slings given their rated capacity.
There are two reasons for this. Not weaving the synthetic fibers, but instead, forming a loop of loose fibers that nest together without overlapping, eliminates cutting of internal fibers. Endless slings are inherently twice as strong when used in vertical and basket hitches as compared to their single legged counterparts. Round slings are covered with a non-load bearing sleeve which protects the loops of loose fibers.
Some theatrical round slings, identified by a black sleeve, take this idea one step further by replacing fibers with steel wires that would normally be used to make wire rope.
Manufacturers, like Lift-it, are making round sling assemblies with hardware already included. They may add a hook or link to a single sling or make multi-leg bridles with hooks and links. In order to accomplish this, slings must be manufactured around the hardware.
Our Rigging Equipment Inspector training program includes inspection of synthetic rope slings.