In the urban slums of Abidjan (Cote d’Ivoire), delivering precast concrete septic tanks is often not feasible due to narrow roads that could accommodate a crane truck. Costs of plastic or fiberglass tanks are generally too expensive for the local population to afford. Ferrocement is a system of reinforced mortar applied over a layer of metal mesh that produces a light thin wall but a very strong structure. Ferrocement provides an option that is less costly and stronger than concrete block or brick construction. Such tanks can be custom fabricated on site.
This technical brief from PSI’s Sanitation Service Delivery (SSD) project describes the procedure for constructing septic tanks using ferrocement.