Page 434 - Planning and Design of Airports

Wheel Load 100,000 lb
5.5
5.0
5.0
4.5
3.5
4.5 5.5 5.0 5.0 4.5 4.0 4.0 3.5 3.5 5.0 4.5 4.5 4.0 3.5 3.5 3.5 4.0 4.0 4.5 4.0 3.5 5.0 4.5 4.0 3.5 3.0 5.5 5.0 4.5 4.0 3.5 3.0 3.0 5.0 5.5 5.0 4.5 4.0 3.5 3.0 5.0 4.5 5.0 4.5 4.0 3.5 4.5 4.0 Cover depths measured from top of flexible pavement or unsurfaced
4.0 3.5 4.5 4.0 3.5 Note: The recommended minimum depth of cover for pipe does not provide protection against freezing conditions in seasonal freezing areas.
Wheel Load 75,000 lb 5.0 4.5 4.0 3.5 3.0 3.0 4.5 4.0 4.0 3.5 3.5 3.0 3.0 Pipe placed under rigid pavements shall have a minimum cover, measured from the bottom of the slab, of 1.0 ft.

4.5 3.5 3.0 4.0 3.5 3.0 2.5 Recommended Minimum Depth of Cover for Pipe, ft (Continued)

4.0 3.0 3.0 3.0 2.5 2.5 3.5 3.0 3.0 2.5 3.0 2.5

Reinforced-concrete culvert pipe Class I Class II Class III Class IV Class V Corrugated metal pipe, gauge no. requirements for 15,000-lb wheel loads. Source: Federal Aviation Administration [2]. TABLE 9-9

12
10
16
14
8
375