Shaft
Diameter
Load Bearing
Capacity
Inside Post
Diamter Round
Inside Post
Diamter Square
4x4 Post 6x6 Post
Wood Metal Wood Metal
8" 10,000 lbs 6-3/4" 4-3/4"
10" 14,000lbs 8-3/8" 5-7/8"
12" 18,000 lbs 10-3/4" 7-9/16"
14" 20,000 lbs 11-1/2" 8-1/8"
16" 20,000 lbs 15" 10-9/16"
18" 20,000 lbs 17" 12"
20" 20,000 lbs 19" 13-3/8"
22" 20,000 lbs 21" 14-13/16"
24" 20,000 lbs 23" 16-1/4"
28" 20,000 lbs 27" 19"
30" 30,000 lbs 29" 20-1/2"
36" 30,000 lbs 35" 24-3/4"