The Municipality required a manhole cover of a diameter of 2.5 metres for a former monastery in Dordrecht. We sat down with them to discuss the assignment and produce initial sketches. The next step was to produce a 3D drawing for the final design. We also prepared a pressure load report. Based on this report, we added additional strengthening ribs. The cover is cast in GG25 and now in situ in Dordrecht.
We have also supplied manhole covers to the Municipality of Amsterdam for many years. These orders are for small quantities of an older type of manhole cover. We produce manhole covers which are no longer made elsewhere due to the low volumes.