Codes for lifting eyes
Codes for lifting eyes
(OP)
Is there an ASME code (or other US code) which covers requirements for lifting eyes? In particular, I need to put a couple of lifting eyes on a machine and would like to see what specific requirements there are for determining suitable lifting eyes.





RE: Codes for lifting eyes
Regards,
Mike
RE: Codes for lifting eyes
RE: Codes for lifting eyes
1) McMaster Carr has unrated lifting eyes - are these acceptable?
2) Thread is 1/4"-20 UNC. Does this need to be bigger to meet code? (side note: load is ~ 600 pounds total using 2 lifting eyes)
3) If lift is not verticle, how should shoulder type lifting eyes be derated?
4) Is there any derating for a shoulder type lifting eye if washers are added?
5) Is there a minimum acceptable length of thread required? Seems like all the lifting eyes I've seen have threaded sections that are much longer than necessary.
I'd like to see a standard that covers these kinds of things if there is one.
Thanks for the feedback.
RE: Codes for lifting eyes
ASME BTH-1-2008 Design of Below the Hook Lifting Devices, Chapter 3
ASME B30.20a-2003 Structual and Mechanical Lifting devices. Section 20-1.2.2 Construction
CMAA crane requirements
AASHO 1.6.17
Steel Construction Manual-AISC
Occupational Safety and Health Administration (OSHA) 29 CFR standard 1926.753(e)(2) and 1926.251
American Society of Testing and Materials Specifications A391
Naval Facility Command NAVFAC-307
American National Standards Institute, "Below The Hook Lifting Devices"
RE: Codes for lifting eyes
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RE: Codes for lifting eyes
Thanks unclesyd. The Carr Lane rings look good and they have 1/4"-20 threaded hoist rings too.
RE: Codes for lifting eyes
When you buy the eyes, the manufacturer's rating and instructions become the code (as they're usually based on one of the above-mentioned codes). Follow the instructions of a reputable manufacturer and you shouldn't have any issues.
RE: Codes for lifting eyes
You state:
"Both Grainger and McMaster-Carr have "rated" lifting eyes.. I would assume (maybe mistakenly) that these are ASME "rated???"
Ummm ----no
My understanding of "rated" is that you test your design to destruction, take an average of many tests, then divide that number by 5 to get your "rated" load.
ASME "rates" nothing...
-MJC