Block Paving Recessed Manhole Cover and Frame 600 x 450 x 80mm

Product Information

A Class II mortar should be used (roughly 4:1) with a plasticiser to improve workability. There is no need to add a waterproofer or a hardening agent. Reseating a Crown Unit of this size will use more or less a 'full-bag mix' of mortar - that is, a full, 25kg bag of building sand, with 6-8kg of cement (Sulphate Resistant [SRC] is best, but Ordinary Portland [OPC] will be satisfactory) along with water and plasticiser. The mortar is spread along the top of the chamber sections, and tidied along the internal edge to reduce the amount of mortar that will fall into the chamber when the Crown Unit is dropped into place. Manufacture: ISO9001 Quality system. F.A.C.T.A. (Fabricated Access Cover Trade Association) member.

It’s never advisable to cover a manhole permanently since you never know when immediate access is needed for a range of reasons. To minimise the impact however you can disguise the existence of a manhole cover by using a recessed manhole cover. It will blend the cover into the garden, pavement or the driveway by using the same materials as the original flooring. There are no implications to access or maintenance and there’s no extra cost once the recessed manhole cover has been installed. The internal joints of the regulating masonry and the frame should be trimmed, tidied and pointed as usual, and then the external joints smoothed, although no great deal of neatness is required.Convertible manhole covers. These covers allow you to convert a drainage hole from one shape to another. IE. Circular drain to a square manhole cover or visa-versa.

Once the level and alignment are correct, the frame can be haunched in place with additional mortar, which should cover the entire flange of the frame, but only extend up the side of the frame by 20-30mm, as sufficient room needs to be left to fit the paving or surfacing around the completed Tray and Frame.All manhole covers fall into 3 distinct categories. These three categories then have varying weight carrying strengths according to how the covers are going to be used. As well as three distinct shapes which are square, round and oblong. If the manhole cover is going to be driven on with vehicles then you must install a suitable cover that will allow the weight of the vehicle. If the cover is just going to carry the weight of pedestrian traffic then the cover will be different in strength again. The built-in strength of the manhole cover usually reflects in the price to buy the cover. The higher the load bearing qualities of the manhole cover usually the higher the cost to buy the manhole cover.