Standards Development

Scope

This document specifies the definitions and requirements for buried circular manholes and inspection chambers installed to a maximum depth of 6 m from ground level to the invert of the main chamber and manufactured from unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP), polypropylene with mineral modifiers (PP-MD) or polyethylene (PE). These products are intended for use in traffic areas, non-traffic areas and are used outside the building structure (application area code “U”).

NOTE 1 Products complying with this document can also be used for highway drainage and surface water.

This document is only applicable to those chamber/manhole items where the manufacturer has clearly stated in the documentation how the components shall be assembled to create a complete manhole or inspection chamber.

The products covered by this document comprise the following:

— products providing access to the drainage or sewerage system by means of inspection and cleaning equipment;

— products designated as manholes providing additionally human access to the drainage or sewerage system.The inspection chamber or manhole can be manufactured by various methods, e.g. injection moulding, rotational moulding, low-pressure moulding or fabricated from components made in accordance with other International Standards.

The jointing of components can be achieved using:

— elastomeric ring seal joints;

— adhesive joints for PVC-U;

— welded joints for PVC-U, PP and PE;

— extrusion welding;

— mechanical jointing.

NOTE 2 Both manholes and inspection chambers can be site-assembled from different components but can also be manufactured as a single unit. In either case, the following functional parts can be recognized:

a) base (always present);In the case of a one-piece chamber or manhole, the base part ends at a distance of 300 mm measured from the top of the main channel.

b) riser (depth-dependent);

c) telescopic part (design-dependent);

d) cone (dependent on the design of near-surface components and their recommended installation);

e) other near-surface components.

NOTE 3 Manholes and inspection chambers can be subject to national regulations and / or local provisions.

NOTE 4 Products complying with this standard can be installed in underground applications without additional static calculations