In this case, we have a ½ inch diameter grade 80 alloy steel chain sling used in a double leg bridle sling configuration at a 450 vertical angle.
To calculate the rated capacity, we need to refer to the manufacturer's specifications or industry standards as they may provide specific formulas or tables for calculating the capacity based on these parameters. The rated capacity can vary depending on the manufacturer and applicable regulations.
It is important to consult the manufacturer's documentation or the relevant standards to obtain accurate and up-to-date information on the rated capacity of the chain sling in this specific configuration.