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May/June 2011
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Aerial Devices

Recent updates to crane and crane operator certification requirements in U.S. Occupational Safety and Health Administration standards have led to the launch of a proposed new ASTM standard, WK31972, Test Method for Mechanical and Electrical Testing of Insulating Links for Lifting Equipment.

The proposed new standard is being developed by Subcommittee F18.55 on Inspection and Nondestructive Test Methods for Aerial Devices, which is part of ASTM International Committee F18 on Electrical Protective Equipment for Workers.

“One of the changes [in the OSHA standards] is a requirement for the use of an insulating link between the hook and the load line on cranes used to lift and/or carry loads that are operating near high voltage lines,” says William Veal, a retired fleet test coordinator, Georgia Power Co., and chairman, F18.55. “OSHA has asked for a standard that can be taken to a nationally recognized testing laboratory for design and proof testing.”

Veal says the proposed standard incorporates a design test to verify that an insulating link meets the minimum specifications for which a manufacturer has designed it. In addition,

WK31972 includes a proof test, usually performed by the manufacturer to prove that the component meets the specifications for which it was ordered, and a periodic test, performed by the user or designated agent to ensure that the component continues to meet safety requirements once it is in use.

CONTACT

Technical Information: William Veal, Forsyth, Ga.

Phone: 478-957-2250

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