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...
While vacationing, a Crane Institute Instructor visited wine country, Napa Valley, California and took a gondola, much like a ski lift, ride through the vineyard.
On cranes, hoist wire rope is one piece that can not be spliced, think of a straight line. For gondola or ski lifts, think of a circle. The two ends need to be spliced together to make a continuous piece. This type of splice is as strong as the wire rope itself.
A recent example of such splicing is when Steamboat Springs in Colorado, replaced their ski lift wire rope after 21 years and 54,000 hours of service. The wire rope of these lifts have a longer life than those installed on cranes for two main reasons. The sheaves, or bull wheels, that the rope runs on have a large D:d ratio. There is no shock loading or contact between the wire rope and other objects.
The Steamboat Springs rope was replaced with 3.4 miles of 6 x 39 plastic core wire rope, weighing 60 tons. To achieve the desired strength, the splice was 250 foot long and 10 foot of each end was hand tucked. ANSI B77-1 Passenger Ropeways Standard states that the splice length must be at least 1,200 times the diameter of the rope.
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.
May 27, 2014 (Sanford, Fla.)—Crane Institute of America announces the release of the first cards in the new Ready Reference Series. The laminated, pocket-sized cards cover topics that are useful for lift directors and crane and rigging inspectors, as well as others with responsibility for overseeing crane activities on the job site.
The first three cards in the Ready Reference Series feature Wire Rope Inspection, Crane Setup, and Working Around Power Lines.
“Both ASME B30.5 and OSHA 1926 Subpart CC for Cranes and Derricks in Construction discuss the job site responsibilities for controlling entities, site supervisors, lift directors, assembly/disassembly directors, crane owners, and others. The Ready Reference Cards are designed to provide these individuals with technical and safety guidelines that are reflection of industry standards and regulations,” said Jim Headley, President and CEO of Crane Institute of America.
The Wire Rope Inspection card makes it easy for inspectors to determine when the wire rope must be removed from service. The card lists wire rope sizes from 3/8” to 1-3/4” (10 mm to 45 mm on back) and the minimum diameter allowed in both fractions and decimals – taking the math out of the inspection.
Crane Setup addresses site preparation, one of the most important aspect of crane operation and explains who is responsible for ensuring the ground will support the crane and loads lifted. Additional information is provided on positioning the crane, maintaining clearances with power lines, and avoiding potentially unstable ground.
Working Around Power Lines summarizes key information about the clearances required when working near or driving under power lines, how and when to use signalpersons. It also includes reminders about how operators and other personnel are to respond in case of contact with live lines.
Future Ready Reference cards will cover Assembly/Disassembly and other topics for individuals...
At CONEXPO 2014, earlier this month, Samson announced that the Manitowoc Grove RT 770E will be equipped with the first synthetic hoist rope for mobile cranes. Samson’s partnership with Manitowoc has allowed them to enter the crane industry to provide a product with numerous benefits.
- 80% lighter than wire rope
- Same load pull and chart with 5:1 safety factor
- No rusting
- No lubricating
- No kinking, birdcaging, or damage from winch drum
- Eliminates load spin and cabling
To prove the viability of synthetic hoist rope, Manitowoc and Samson conducted lab testing and field trials to find tensile strength and fatigue, bend fatigue, and effects from temperature. Tests were conducted at two Samson labs and two third-party labs where more than 4.6 miles of rope was manufactured and tested.