The approved backfill procedure limits loose lifts to 8 inches for this soil and compactor. A crew places one 24-inch loose lift. What should be done?
Correct Answer
C) Rework it into proper lifts, compact and retest
Rework the material into permitted loose lifts, compact and verify acceptance before covering. Compacting only the surface does not demonstrate full-depth density. The stated 8-inch limit applies to this approved method; it is not a universal limit for all soils and equipment. Source: https://www.fhwa.dot.gov/construction/cpmi04b8.cfm
Why This Is the Correct Answer
Rework the material into permitted loose lifts, compact and verify acceptance before covering. Compacting only the surface does not demonstrate full-depth density. The stated 8-inch limit applies to this approved method; it is not a universal limit for all soils and equipment. Source: https://www.fhwa.dot.gov/construction/cpmi04b8.cfm
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The specified resilient flooring and adhesive require slab moisture and pH checks before installation. Testing has not been completed, but the crew wants to meet turnover. What should happen?
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Under 2021 IBC 1507.7.2, what is the minimum roof-deck slope for natural slate shingles?