The fourth floor exterior wall base assembly sits atop a structural steel beam supporting a concrete slab over metal deck. An exterior waterproofed assembly features a drainage system beneath a lightweight concrete topping sloped to drain, finished with an elastomeric coating. The interior floor consists of standard concrete over metal deck meeting the exterior wall condition at the level 39'-0" datum.
FOURTH FLOOR 39'-0" EXTERIOR INTERIOR AH12.3g 4 ELASTOMERIC COATING LIGHT-WEIGHT CONCRETE TOPPING SLOPE TO DRAIN WATERPROOFING MEMBRANE OVER DRAINAGE SYSTEM SLOPE TO DRAIN CONCRETE OVER METAL DECK, SLOPE CONCRETE TO DRAIN STEEL BEAM CONCRETE OVER METAL DECK
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