Installation and backfill criteria for utilities running parallel or perpendicular to concrete wall footings. Structural backfill is required within two times the trench depth on each side of the footing, compacted to ninety-five percent maximum density per ASTM standards. Concrete backfill must be placed underneath footings where ninety-five percent compaction cannot be achieved. Foundations shall remain unloaded until structural backfill under and near footings is fully complete. Pipes are restricted from being placed directly inside the footing without specific engineer approval.
NOTES: 1. FOUNDATIONS SHALL NOT BE LOADED PRIOR TO COMPLETING STRUCTURAL BACKFILL UNDER AND NEAR FOOTINGS. 2. CONCRETE BACKFILL SHALL BE USED UNDER FOOTINGS WHERE 95% COMPACTION CANNOT BE ACCOMPLISHED. 3. ALL STRUCTURAL BACKFILL NOTED SHALL BE COMPACTED TO 95% OF MAXIMUM DENSITY PER ASTM. 4. A PIPE SLEEVE SHALL BE PROVIDED FOR SHALLOW PIPES CAST IN CONCRETE. 5. PIPES SHALL NOT BE PLACED IN THE FOOTING WITHOUT SPECIFIC APPROVAL FROM THE ENGINEER. 6. FOR VARIATIONS CONTACT ENGINEER. PIPE PARALLEL TO WALL FTG EXCAVATION PERMITTED BELOW PRIOR TO LOADING 1½ 1 CONC. BACKFILL BELOW FTG STRUCT. BACKFILL WITHIN (2) TIMES THE TRENCH DEPTH EA. SIDE OF FTG TYPICAL FOR PARALLEL PIPES ADJACENT TO FOOTINGS WIDTH OF FTG MIN. TYPICAL FOR PERPENDICULAR PIPES UNDER FOOTINGS 6 1/4"
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