With a better performance than Cast Iron, Ductile Iron and RCC manhole covers, this product is an industrial revolution. They have been thoroughly tested as per BS EN 124 1994 & AASHTO M306 standards for drainage and utility services. Thermodrain manhole covers meet all the requirement of the code. Our covers are available in all standard sizes with load bearing capacity ranging from 1.5 tons(A 15) to 40 tons(D 400). They are circular, square and rectangular shapes available with single and double sealed arrangements. Locking arrangement on the cover is also available on request. All the sizes of manhole covers are available in the following load bearings. 1. 5 tons (A 15) / 2.5 tons / 5 tons / 10 tons / 12.5 tons (B 125) / 20 tons / 25 tons (C 250) / 40 tons (D 400).