Line 7: Line 7:
 
<th colspan=2>Size</th>
 
<th colspan=2>Size</th>
 
<th colspan=5>Approximate Percent of Total Weight Smaller than Given Weight</th>
 
<th colspan=5>Approximate Percent of Total Weight Smaller than Given Weight</th>
</tr>
 
<tr>
 
<th colspan=5>Riprap Class</th>
 
 
</tr>
 
</tr>
 
<tr>
 
<tr>
Line 16: Line 13:
 
<th rowspan=2>in</th>
 
<th rowspan=2>in</th>
 
<th rowspan=2>mm</th>
 
<th rowspan=2>mm</th>
 +
</tr>
 +
<tr>
 +
<th colspan=5>Riprap Class</th>
 
</tr>
 
</tr>
 
<tr>
 
<tr>

Revision as of 14:15, 11 March 2019

MnDOT standard riprap gradations
Link to this table

Weight Size Approximate Percent of Total Weight Smaller than Given Weight
lb kg in mm
Riprap Class
I II III IV V
2,000 900 30 750 - - - - 100
1,000 450 24 600 - - - 100 -
650 300 21 525 - - - - 75
400 180 18 450 - - 100 - -
250 113 15 375 - - - 75 50
120 55 12 300 - 100 75 50 -
50 22 9 225 - 75 50 - -
15 7 6 150 100 50 - - 10
5 2 4 100 - - - 10 -
2 1 3 75 50 - 10 - -
- - 2 50 - 10 - - -
- - 1 25 10 - - - -