Originally Posted by Francesca Knowles
Now, you know
we're not lettin' you get off without your showing the "well documentation" as applies to safety chain degradation/failure.
The schoolyard rules under which we operate here apply:
I showed you mine, now you have to show me yours!
LOL Francesca you sure you really want to go here???
First off please note I used the word "weaken" not the others you mentioned
Here is a very quick look at what just a few companies that make chains have to say on the topic:
From the Peerless Industrial Group - Cautions and Warnings
- Safety Check List: "Check #4 -Knots, Twists & Kinks Make sure chain is not twisted, knotted or kinked before lifting load. Slings should not be shortened with knots, bolts or other make-shift devices."
From Whitelaw Rigging and Fabrication: Allow Chain sling instructions. Reads in part: "General Usage -
Certain factors in the use of lifting chain and attachments can be abusive and reduce the load that the chain or attachments can support. Some examples are twisting the chain......."
From Suncorstanless.com Chain Use
: "Use slings with the proper reach (length). Never shorten a sling by knotting it, twisting, or with fasteners such as nuts and bolts. Lifting a load with twisted or knotted chains can impose loads in excess of rated capacity or spin the load dangerously."
If you google it I am sure you will find many other manufactures with the same advise and probable a more detailed explanation of the whys and how comes if you feel you require it.
Will leave the last word with both our governments: US Department of Labor - Safe Sling Use - under the section of Alloy Steel Chain Slings -Rigging Practices
"Avoid twisting and kinking".
Canadian Centre for Occupational Health and Safety: Materials Handling - Chain Safety - What you should avoid when using chain Slings
"Do not shorten a chain with knots or by twisting other than by means of an integral chain clutch"
Hope thats school yard enough of an explanation for you