AZ ROC A General Engineering (Commercial) Practice Questions - Arizona ROC A General Engineering (Commercial) Examination Exam

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When installing a gravity sanitary sewer line beneath a commercial roadway subject to heavy traffic loading, what is the standard requirement for trench pipe bedding and initial backfill zone?

Granular aggregate bedding compacted to 95% relative density extending from 4 inches below pipe to 12 inches above pipe crown Native uncompacted excavated soil placed directly under pipe Flowable lean concrete backfill surrounding the pipe up to subgrade elevation Clean washed river sand without compaction

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Granular aggregate bedding compacted to 95% relative density extending from 4 inches below pipe to 12 inches above pipe crown

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