How to Measure an Anchor Chain
Anchor chain is measured by the thickness of the steel making up the links. This means that 1/2-inch anchor chain is made up of links formed from 1/2-inch diameter round bar (called "wire"), which is then bent into the shape of the link and the two ends are welded together. As with all other chain, the radius of the bend of the link must be greater than 1/4 inch; if it were not, it would be impossible to insert the 1/2-inch wire for the next link through the bend, which would be exactly 1/2-inch wide, and allow for any movement between the links.
Instructions
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1
Open the jaws of the adjustable wrench so they are wide enough to slip over the thickness of the bar from which the link is formed.
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2
Insert one side of the link into the jaws of the adjustable wrench. Close the jaws of the wrench until the jaws barely make contact with the bar. Remove the link without opening the jaws of the wrench.
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3
Measure the span of the jaws with the measuring tape.
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