Page 435 - Planning and Design of Airports

5.5 4.5 5.5 5.0
Cover depths measured from top of flexible pavement or unsurfaced areas to top of pipe. Cover for pipe in areas not used by aircraft shall be in accordance with cover

5.0 4.5 5.5 5.0 4.5

5.0 4.0 5.0 4.5 4.0
Wheel Load 100,000 lb 5.5 5.0 4.5 4.0 3.5 3.5 5.0 4.5 4.5 4.0 4.0 3.5 3.5

5.0 4.0 3.5 4.5 4.0 3.5 3.0

4.5 3.5 4.0 3.5 3.0

3.5 3.5 3.5 3.0 3.0

5.0 4.0 5.0 4.5
Rigid Pavement
4.5 4.0 5.0 4.5 4.0

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

10
14
16
12
8
375