Water drainage nozzle, has series of recesses/holes extending between lower surface of concrete beam and drainage channel for facilitating passage of water from base towards channel, where channel collects and drains water

摘要

The nozzle has an porous concrete beam with a drainage channel that collects water passing through the beam and drains the water. The beam has upper and lower surfaces, and the channel extends between the surfaces. The lower surface is provided with a porous film, and a series of recesses/holes (60)extends between the lower surface and the channel for facilitating passage of water from a base towards the channel. The holes have a central axis (63), which is distant from a vertical plane passing via a longitudinal central axis of the channel when the lower surface extends in a horizontal plane. An independent claim is also included for a porous concrete element for a drainage nozzle comprising a drainage channel.