Description of Loading Classes – LOADING STANDARDS

IS 1726:1991

LD-2.5 (2.5 Tonnes) : Suitable for use within residential and institutional complexes/areas with pedestrian but occasional light motor vehicle traffic. These covers are also used for ‘Inspection Chambers’

MD-10 (10 Tonnes) :Suitable for use in service lanes/roads, on pavements for use under medium duty vehicular traffic including car parking areas.

HD-20 (20 Tonnes) : Suitable for use in institutional/commercial/carriageways/city trunk roads/bus terminus, with heavy duty vehicular traffic of wheel loads between 5-10 tonnes like Buses/Trucks and parking areas and where the manhole chambers are located in between the pavement and the middle of the road.

EHD 35 (35 Tonnes) :Suitable for use on carriageways/industrial/port areas/near warehouses/godowns where frequent loading and unloading of trucks/trailers are common, with slow to fast moving vehicular traffic of the types having wheel loads upto 11.5 tonnes irrespective of the location of the manhole chambers.

EN 124*
Due to inherit limitation of FRP, designs of FRP covers for loading classes D-400 & E-600 are subject to technical viability.
A-15 (1.5 Tonnes)       : Areas which can only be used by pedestrians and pedal cyclists.
B-125 (12.7 Tonnes)   : Footways, pedestrian areas and comparable parks or car parking decks.
C-250 (25.5 Tonnes)   : For gullytops installed in the area of curbside channels of roads.
D-400 (40.8 Tonnes)   : Carriageways of roads (including pedestrian streets), hard shoulders and parking areas, for all types of road vehicles.
E-600 (61 Tonnes)      : Areas of imposing high wheel loads, e.g. dock and aircraft pavements.