TM 5-820-4/AFM 885, Chap 4
Corrugations
H-20 HIGHWAY LOADING
MAXIMUM COVER ABOVE TOP OF PIPE, FEET
DIAMETER,
266
130
170
213
372
92
101
212
74
80
298
104
136
170
173
113
86
142
212
61
67
139
57
74
164
53
97
121
85
50
106
120
155
46
137
65
41
75
94
44
57
109
133
120
85
37
40
68
119
52
110
101
71
30
33
56
88
98
103
43
74
76
34
47
95
99
60
92
81
48
53
88
30
41
71
66
91
93
65
90
59
82
88
63
36
57
54
74
87
86
52
49
86
85
45
85
79
84
75
---.
U. S. Army Corps of Engneers
Notes :
1. Corrugated steel pipe will conform to the requirements of Federal Specification WWP405.
2. The suggested maximum heights of cover shown in the table are calculated on the basis of the current AASHTO
Standard Specifications for Highway Bridges and are based on circular pipe.
3. Soil conditions, trench width and bedding conditions vary widely throughout varying climatic and geographical areas.
4. Calculations to determine maximum cover should be made for all individual pipe and culvert installations underlying
roads, streets and open storage areas subject to H20 live loads. Cooper E80 railway loadings should be independently
made.
5. Cover depths are measured from the bottom of the subbase of pavements, or the top of unsurfaced areas, to top of pipe.
6. Calculations to determine maximum cover for Cooper E80 railway loadings are measured from the bottom of the tie
to the top of the pipe.
7. If pipe produced by a manufacturer exceeds the strength requirements established by indicated standards then cover
depths may be adjusted accordingly.
8. See table C9 for suggested minimum cover requirements.
C-5
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