Page 433 - Planning and Design of Airports
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60 4.0 3.0 4.0 3.5
48 42 3.5 3.5 3.0 3.0 4.0 4.0 3.5 3.5 3.0 3.0
Nominal Diameter of Pipe, in 36 30 Wheel Load 60,000 lb 5.0 4.5 4.5 4.0 3.5 3.0 2.5 2.5 4.0 3.5 3.5 3.0 3.0 2.5 2.5
24 4.5 4.5 4.5 4.0 3.0 2.5 3.5 3.0 2.5 2.0
18 4.0 4.0 4.0 3.5 3.0 2.0 3.0 2.5 2.0
Pipe Cover 12 3.5 3.5 3.5 3.0 2.5 2.0 2.5 2.0 1.5
60 4.0 3.0 2.5 3.5 3.0
Flexible Pavement 48 4.5 4.0 3.0 2.5 3.5 3.0 2.5
Nominal Diameter of Pipe, in 42 36 Wheel Load 45,000 lb 4.0 4.5 4.0 3.5 3.5 2.5 2.5 2.0 2.0 3.0 3.0 2.5 2.5 2.0 2.0 1.5
24 30 4.0 3.5 3.5 4.0 3.5 3.5 3.0 2.5 2.5 2.0 2.0 3.0 3.0 2.5 2.5 2.0 2.0 1.5
18 3.5 3.5 3.5 3.0 2.5 1.5 2.5 2.0 2.0
12 3.0 3.0 3.0 2.5 2.0 1.5 2.0 1.5 1.5
Kind of Pipe Clay culvert pipe Concrete sewer pipe (extra-strength) Reinforced-concrete culvert pipe Class I Class II Class III Class IV Class V Corrugated metal pipe, gauge no. 16 14 12 10 8
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