Drainage system for flat roof, has drain element with external lining plate having thickness of about 2 millimeters

摘要

A drainage system has a drain element (1) of an L shaped cross section (2). The drain element has an external lining plate with a thickness of about 2 millimeters. The horizontal part of the L shaped cross section is projected outward, and defining a water guiding plate. The corners of the L shaped cross section are rounded.