Materials

The following materials are used in the construction of sewers:

(a)        Clay or concrete

(b)       Cast Iron

(c)        Steel

(d)       Wood

(e)        Asbestos

(f)        Bituminized Fibre

(g)       Plastic

(h)       Other materials.

It is important that the material that is chosen for sewer construction should meet the necessary specifications. Therefore, testing the materials delivered at site assumes special importance for the engineer incharge of the work. Ordinarily, standard specifications of the country should be followed vis-a-vis the quality and testing; but it sometimes happens that the engineer may have to select new materials for which he must write his own specifications based on need-specific considerations.