Waste Water Engineering
The asbestos cement sewers are

All of these
Light in weight
Susceptible to corrosion by sulphuric acid
Not structurally strong to bear large compressive stress

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Waste Water Engineering
In septic tanks,

The clear space between the baffle top and covering slab is about 7.5 cm
All listed here
The baffles or tees are extended up to top level of scum
Free board of 0.3 m may be provided

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