AREA DRAIN FOR A PROMENADE DECK OR LIKE ENVIRONMENT

摘要

As an adjustable drain for promenade decks with a seepage-draining permeable layer, e.g., of gravel, between a waterproofed lower poured concrete structural slab and a finished top poured traffic slab, a bowl body embedded in the lower slab has a wide peripheral top flange affording a large sealing area with the overlying waterproofing layer, receives the lower end of a perforated cylindrical filter collar removably adjustably bolted therein, and supports, through three adjustable threaded rods spaced externally of the filter, a rim for a removable grate at the finish level. From the rim, anchors project obliquely into the top slab and, external of the rods, a transitory top slab-forming and gravel-sand retaining sleeve depends from a rim bottom formation.