Grain Systems Tanks PNEG-4021 - Manual (Page 16)

3. General Overview
16 PNEG-4021 40 Series 18', 21' and 24' Diameter Bins
Figure 3B Anchor Bolt Chords for 21' Diameter 2 Post Bin
Diameter 21'
# of Anchors 14
Bolt Radius 10' - 10-1/8"
Chord 1 4' - 9-15/16"
Chord 2 9' - 4-15/16"
Chord 3 13' - 6-5/16"
Anchor chord dimensions Bolt radius