In 1938 the National Park Service published a Guide to Bracing. Since trees and lags haven't changed much, these ratings still seem reasonable. Just remember that a maximum rating is dependent upon correct lag installation, 0 degree pull and the species of tree.
|SKU||Size||Length||Thread Twist||Load rating (4:1)|
Cabling & Bracing Hardware
Common Grade Strand
Extra-High Strength Strand