Abstract

This document gives guidance on the structural design of underground modular systems for infiltration, attenuation and storage of non-potable water (e.g. storm water) under various conditions of loading. The procedures are explained, with the appropriate variables in the design formulae, and provides graphical information on vehicle surcharge loadings. These modular systems are constructed from multiple cuboid shaped thermoplastic boxes generally with ancillary components such as inlet/outlet connectors, vents, and access/inspection provision. This guidance is for the design of modular systems conforming to EN 17152-1 and EN 17152-2. The boxes, including integral components, are injection moulded, extruded or thermoformed thermoplastics, manufactured from polypropylene (PP) or unplasticized poly(vinyl chloride) (PVC-U), and are intended to be used as elements in a modular system where the manufacturer has clearly stated in the documentation how the components are assembled to create a complete infiltration, attenuation or storage system. Outside the scope of this document are the following conditions: seismic loads, lateral loads from adjacent structures and sloped surfaces, influence of trees, non-standard backfill materials. Geotextile and/or geomembrane used with modular systems are outside the scope of this document. NOTE 1 Specifications for individual boxes are given in part 1 of EN 17152. NOTE 2 Specifications for modular systems are given in part 2 of EN 17152 NOTE 3 Assessment of conformity of individual boxes is given in Part 3 of EN 17152. NOTE 4 Non load bearing component(s) can be manufactured by various methods e.g. extrusion, injection moulding, rotational moulding, thermoforming and low-pressure injection moulding. These boxes are intended for buried underground use, e.g. in landscape, pedestrian or vehicular traffic areas.

Begin

2023-01-24

WI

00155A0Q

Planned document number

DIN CEN/TS 17152-4

Project number

11904866