Covers manholes for use with concrete drainage pipe conforming to TIS
128 and TIS 224, excluding cover. Classifies into 2 types as with and
without sedimentary basin. Specifies dimensions of manhole and of
ladders (if any), materials and manufacture (e.g. Portland cement,
reinforcement). Prescribes requirements for workmanship, tensile
strength, crushing strength of ladder, compressive strength of concrete.
Includes marking, labelling, sampling and criteria for conformity, testing.