Table C9. Suggested Guidelines for Minimum Cover
H-20 Highway Loading
Diameter/2 or 3.0'
whichever is greater
Diameter/2 or 3.0'
12" to 108"
whichever is greater
12" to 36"
Diameter/2 or 3.0'
whichever is greater
1.5'
Diameter
Diameter/2
60" and over
Diameter/2
Steel
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