Question: A 12-in-diameter distribution line will operate at a working pressure of 100 lb/in2. Average depth of cover will be 5.0 ft under a paved roadway.

A 12-in-diameter distribution line will operate

at a working pressure of 100 lb/in2. Average depth of cover will be 5.0 ft

under a paved roadway. The native soil is sand. Using standard AWWA

design procedures, what class of asbestos-cement should be used if the pipe

is laid in a flat-bottom trench with tamped backfill? Assume the trench

width is 3.0 ft, and the bedding factor is 1.3.

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