General · G-XCFQX

Trench Dam

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Utility lines and conduits entering the building are encased in a one sack concrete slurry trench plug or dam measuring the greater of thirty-six inches or twice the trench width. High-density closed-cell adhesive-backed PVC foam tape, one-quarter inch thick by one-half inch wide, is applied to clean pipe surfaces with ends butted together within the trench dam zone. Piping and conduits are protected from corrosion using PS-37-90 black plastic PVC or polyethylene pressure-sensitive tape where encased in cement slurry or concrete. Electrical conduits require seal-off EYS fittings at the electrical panel with a minimum six-inch wall clearance. Normal fill is compacted to ninety percent minimum dry density with a maximum twelve-inch depth above the slurry.

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