An elevator pit concrete wall bears against eighty-five percent compacted soil with an intervening pre-applied sheet membrane waterproofing layer. A one-quarter-inch protection board shields the membrane on the soil side. The sheet membrane features a typical four-inch lap joint secured with a six-inch wide tape.
ELEVATOR PIT WALL, S.S.D. 4" LAP TYP. PRE-APPLIED SHEET MEMBRANE WATERPROOFING PRE-APPLIED SHEET MEMBRANE WATERPROOFING TAPE, 6" WIDE 85% COMPACTED SOIL, S.C.D. 1 4 " PROTECTION BOARD
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