A concrete sump box set over a layer of free-draining gravel features a sloped bottom floor. The opening is framed with an embedded steel angle on all four sides supporting a steel grate equivalent to McNichols GW-125A. A waterstop is installed on all sides of the sump box near the top interface. The exterior of the sump box is wrapped in waterproofing membrane. Clear dimensions indicate a two-foot width and a one-foot four-inch depth.
WATERSTOP, ALL SIDES OF SUMP BOX WATERPROOFING SUMP BOX FREE-DRAINING GRAVEL SLOPE SLOPE 2' - 0" 1' - 4" STEEL GRATE, EQ. TO MCNICHOLS GW-125A EMBEDED STEEL ANGLE, ALL 4 SIDES
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