Federal Regulation RR-C-271D 1

[celeronsean]

I was researching this particular standard because of the discrepancies I found in the WLL "Working Load Limit" stamped on the shackles we use for lifting. At first I believed it to be different manufacturers have different WLLs...I found this not to be true, however. This standard came about c.1990 but I can't find any information on prior standards to see if there was a change.

If there was a change, should the older shackles be disposed of or can the rating be changed on the schackle itself?

 

[Cockroach]

Lifting equipment is generally governed by the various independent regulatory bodies and provincial (in Canada) or State (in America) specifications. For example, oilfield has lifting specifications from API as well as Occupational Health and Safety (Alberta).

In general legacy equipment is tagged obsolete and destroyed/disposed of. Sligs for example are shredded after a specified lifetime of usage, 4 months or so. You would never change the rating on lift equipment and jewelry devices without the proper analysis and be capable of doing so within your scope of engineering practice.

You may also wish to address some of these concerns through regular inspection and maintenance programs. Again, I know the oil industry the best, Halliburton, Schlumberger and Baker all have HSE (health, safety, environment) investing millions of dollars into annual programs that basically protect their employees from unnecessary industrial accidents. Although inevitable, the programs serve as constant reminders and vigilance at the worksite using various equipment.

Hope this helps.

Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada

 

[DAVIDSTECKER]

MIL-S-24214A for shackles was superseded by RR-C-271 10 October, 1990.