Its a rigging chart that shows information related to cable clamps, slings, turnbuckles and the like.
Additional resources can be found at the following links.
Not a PDF, but does list common breaking strengths.
Formulas and other links. Has links for free rigging software.
You can't beat clancy's website. It has alot of great information available.
And for purchases, Bill Sapsis is on the top of the list for rigging supplies.