Page 63 - Buried Pipe Design
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Airport ‡ 3.06 2.29 1.91 1.53 1.14 1.05 § § § § §
Live load transferred to pipe, lb/in * Railway Highway E-80 † H-20 * 4.17 § 3.47 § 2.78 § 2.08 § 1.91 § 1.74 § 1.39 § 1.04 § 0.69 § § § § § impact.
Height of cover, ft 14 16 18 20 22 24 26 28 30 35 40 ‡ 180,000-lb dual-tandem gear assembly, with 26-in spacing between tires and 66-in center-to-
Airport ‡ — 13.14 12.28 11.27 10.09 8.79 7.85 6.93 6.09 4.76 impact. impact. center spacing between fore and aft tires under a rigid pavement 12 in thick Reprinted, by permission, from Uni-Bell Handbook. 26
Live load transferred to pipe, lb/in † Railway E-80 † — 26.39 23.61 18.40 16.67 15.63 12.15 11.11 7.64 5.56 † Simulates 80,000 lb/ft railway load
Live Loads Highway H-20 * 12.50 5.56 4.17 2.78 1.74 1.39 1.22 0.69 § § * Simulates 20-ton truck traffic § Negligible live-load influence.
TABLE 2.8 Height of cover, ft 1 2 3 4 5 6 7 8 10 12 SOURCE:
39
