Square Manholes
Square Manholes for drain and sewer systems supplied with standard C250 (25 tonnes) load rating and optional heavy-duty D400 (40 tonnes) versions, suitable for inspection, drainage, and personnel access applications.
Overview
Square manhole covers are supplied with a standard load rating of C250 (25 tonnes), with heavy duty D400 (40 tonnes) versions available for applications requiring higher load resistance.
Drain & Sewer System Applications (As Provided)
Square manholes are used within drain and sewer systems together with inspection chambers, intersection structures, storm water overflow works, infall works (street type drainage), outfall structures, and valve works.
Standards & Definitions (As Provided)
- EN 476: Manholes form the largest share of sewer and drain system structures, with inspection chambers to EN 476 increasingly preferred.
- EN 752-1: A manhole is defined as a chamber with a removable cover on a drain or sewer permitting personnel access.