Special Manholes
Special Manholes for drain and sewer systems supplied with standard C250 (25 tonnes) load rating and optional heavy-duty D400 (40 tonnes) versions, designed for customized applications and specific project requirements.
Overview
Special Manholes are supplied with a standard load rating of C250 (25 tonnes), with heavy duty D400 (40 tonnes) versions available to meet higher load and traffic requirements.
Drain & Sewer System Applications (As Provided)
These 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 represent the largest share of sewer and drain system structures, with inspection chambers to EN 476 increasingly in use.
- EN 752-1: A manhole is defined as a chamber with a removable cover on a drain or sewer permitting personnel entry.