Abstract: A drainage device for drainage of moisture which collects between a waterproof isolating layer applied to the top surface and a concrete slab itself and/or moisture which passes through a surface layer deposited on top of the isolating layer. The drainage device has a drainpipe extending through the concrete slab and having at its upper end a shallow funnel provided on its upper surface with radially extending grooves and being flush with the top surface of the concrete slab. The funnel is fitted on its underside with a centering cuff concentrically surrounding the funnel tube spatially separating the funnel tube from the drainpipe, the diameter of the funnel tube being at least about 20% smaller than the inner diameter of the drainpipe. The upper end of the funnel opening is covered with a mushroom shaped insert resting on the top of the isolating layer and having radially extending grooves on its underside.

Abstract: This invention relates to a device for spanning expansion gaps in bridge decks or roadways. The invention provides a small, simple and low cost edge channel member of U-shape which may be welded to one type or a variety of different commericially available steel sections in accordance with any particular needs. Screws accessible from above are provided to retain the edge portions of an elongate body of flexible resilient elastomeric material which spans the expansion gap. Thus, the invention permits the installation of expansion joints for any desired thickness of the wearing course and any type of fastening to the concrete base course.