{"id":536,"date":"2023-03-17T09:23:42","date_gmt":"2023-03-17T09:23:42","guid":{"rendered":"https:\/\/www.crescentfoundry.com\/blog\/?p=536"},"modified":"2026-05-08T08:56:29","modified_gmt":"2026-05-08T08:56:29","slug":"difference-between-manhole-covers-and-access-covers","status":"publish","type":"post","link":"https:\/\/www.crescentfoundry.com\/blog\/difference-between-manhole-covers-and-access-covers\/","title":{"rendered":"Difference Between Manhole Covers and Access Covers – All You Need to Know"},"content":{"rendered":"

Whether you appreciate it for keeping unauthorized stuff out of the sewerage or hate it for being a bump on your way, you simply can\u2019t ignore the piece of invention that is a manhole cover! Found in numbers in any given neighborhood, manhole covers are basically lids shut over large sewerage openings. But there is more below the surface of urban areas than just sewerage.\u00a0<\/span><\/p>\n

A world of electrical wiring clusters, basements, and maintenance crawl spaces lie under what meets the eye, all needing seamless covers for entrances that open onto public areas. <\/span>Access covers<\/b><\/a>, like manhole lids, are meant for safe access to concealed regions, housing heating and ventilation ducts, plumbing, electrical wiring, and more.\u00a0<\/span><\/p>\n

Though similar in configuration, manhole covers and access covers differ in their use cases. Read more to find out how:\u00a0<\/span><\/p>\n

Engineering Material<\/b><\/h2>\n

Traditionally, manhole cover manufacturers have come to favour cast iron while designing sturdy lids for drainage or sewerage openings. With a massive tensile strength of more than 420 Mpa and a yield strength of more than 300 Mpa, cast iron makes for an extremely economical option while also ensuring great durability.\u00a0<\/span><\/p>\n

You can avail two types of cast iron manhole covers<\/a> from heavy-duty foundries – ductile cast iron and grey cast iron. Having a graphite microstructure, grey cast iron lids are heavier, corrosion resistant, easy to weld, while also having a high galling-resistance capacity.\u00a0<\/span><\/p>\n

Access covers, on the other hand, are most commonly found in stainless steel, galvanised steel, and aluminium. The choice of material of access covers depends on the type of industrial area where it is being used, and the load classes for different use cases, as per <\/span>EN 124<\/b>.\u00a0<\/span><\/p>\n

Stainless steel is considered appropriate for access covers in the food industry, chemical plants, meat storage units, and beverage product manufacturing and packaging units. As for shopping malls and retail outlets, residential areas and private villas, access covers typically used are made of galvanised steel.\u00a0<\/span><\/p>\n

At slightly more demanding spaces that see hundreds of footfalls a day, like hotels and hospitals, typically found access covers are of aluminium. Owing to its lightweight property and corrosion-resistance, aluminium is favoured for designing lids installed in interior commercial spaces. An aluminium square plate can visually blend with floor tiles of light hues and also ensure effortless lifting for easy access into maintainance chambers under the surface.\u00a0<\/span><\/p>\n

Load Capacity<\/b><\/h2>\n

Light duty covers, having a load capacity up to 2.5 tonnes, are popular for gardens, patios, and driveways – whereas more hardy covers are crucial for industrial estates, docks, airports, loading bays and the like.\u00a0\u00a0<\/span><\/p>\n

Access covers generally do not require a load capacity exceeding 6.5 tonnes unless they are used on the road. Out-of-door access covers may be required to withstand heavy-duty pressure, up to 11.5 tonne pneumatic tyre wheel load.\u00a0<\/span><\/p>\n

In both manholes and other kinds of under-surface recesses, the weight withstood is distributed along the length of a downwards-extending vertical grate. Since the Bureau of Indian Standards have not yet come up with a specific code for cover weightage, most access and <\/span>manhole cover manufacturers<\/b><\/a> <\/b>would adhere to the European EN 124. According to this statute, there are six distinct load classes in which both types of covers are available:<\/span><\/p>\n