Excavation for parallel pipes is permitted below prior to loading with a one-and-a-half to one slope. Structural backfill is required within two times the trench depth on each side of the footing. Concrete backfill is placed below footings where ninety-five percent compaction cannot be accomplished. A pipe sleeve is provided for shallow pipes cast in concrete, and pipes are not placed in the footing without specific approval from the engineer.
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 6 1 / 4" WIDTH OF FTG MIN. TYPICAL FOR PERPENDICULAR PIPES UNDER FOOTINGS 6 1/4"
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