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Division B: Part 9: Housing and Small B...
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9.12.4. Trenches beneath Footings
9.12.4.
Trenches beneath Footings
9.12.4.1.
Support of Footings
The soil in trenches beneath footings for sewers and watermains shall be compacted by tamping up to the level of the footing base, or shall be filled with concrete having a strength not less than 10 MPa to support the footing.
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