FAQ
M.M.’s FRP manholes are designed and produced in accordance with what the EN 124:2015 standard “Gully tops and manhole tops for vehicular and pedestrian areas” establishes. The EN 124:2015 standard establishes which are the tests to be carried out and their methodologies, and their differences according to the type of material used. As for the tests which are required by […]
The weight of an M.M. manhole cover depends on its shape, its size and its load class. If compared to the same type made of cast iron, the M.M. manhole cover can be 60% lighter. Class Type Hole FIBERTOP kg Cast iron kg sparing B125 square 600×600 26 70 -63% C250 round 600 34 53 […]
The EN 124:2015 standard establishes the deformation limits as generated by the loads applied. Composite material manhole covers performance is by large lower than the limits established by the norm. In addition, due to the material’s flexibility, the permanent deformation is particularly reduced and they remain practically flat even after sever load cycles. The already mentioned flexibility characteristic of composite […]
The EN124:2015 standard establishes a concept of fixing avoid tampering with manhole covers and to make sure that the “suction effect” caused by the passing vehicles does not lift the cover from the frame. This requirement is established for manhole covers which are placed in road traffic areas, so from class C250 on. M.M. manhole covers are blocked by screws […]
M.M. manhole covers made of composite material can have an RFDI tag or other geotracking systems embedded for revealing their position or to identify the type of network or devices which are located under the cover without lifting it or remotely. M.M. manhole covers made of composite material can also have a metal plate embedded which makes it possible to […]
M.M. manhole covers made of composite material have been tested to determine how they interfere with electromagnetic waves in a range of frequency from 800 Mhz to 6 Ghz. The interference that was determined is practically irrelevant, i. e. the manhole cover made of composite material does not create any disturbance to radio frequencies or to wireless and cellphone communication. […]
NO, they can’t. May they be made of cast iron or of FRP, the covers cannot bear the CE marking. Although the EN 124:2015 standard is comprehensive of the CE marking issues, i. e. the annex ZA, the process for making it become uniformed is not concluded yet. CE marking of manhole covers cannot be done until the norm won’t […]
M.M.’s FRP manhole cover is certified for A15 – B125 – C250 – D400 load classes as established by the EN 124:2015 standard “Gully tops and manhole tops for vehicular and pedestrian areas”. The new EN 124:2015 standard addresses some of the missing issues of the previous versions regarding manhole covers, and it refers now to the new materials which […]
FRP manhole covers can be fully coloured, this is a novelty for what concerns street furniture and it can be a new resource for architects and designers who can re-interpret the traditional urban aesthetic canons. Customization of the M.M. manhole cover with the client’s logo and other drawings is available upon request. The quality of the resolution of the drawing […]
M.M.’s manhole covers bear the CSI RECYCLABLE COMPOSITES MARKING according to what is established by the Particular rules Doc. 003/13 based on the UNI EN 13430:2005 standard. The certificate of conformity FRP20005 certifies that manufacturing scraps of gratings, structures, enclosures, manhole covers and fiberglass coverings (which are all M.M. products, a specialist in the production of this type of materials) […]
The mounting procedure of the M.M. FRP manhole covers is the same as the one for the cast-iron ones, thus it is easy to carry out the work by workers who are used to the traditional systems. The lightweight of the M.M. FRP manhole cover makes it possible to install by engaging only two workers only who use standard tools. […]
Due to the way of the support contact and the reduced tolerance, the standard M.M.’s FRP manhole cover guarantees a good water tightness. Upon request, M.M.’s FRP manhole covers may include an O ring gasket which makes the junction tight onto the frame as well as other gaskets for the support ant lifting areas. With this arrangement gas and liquid […]
