The principal of a swimming pool shell

The shell of a pool must be able to withstand both the forces of the water from the inside and also the forces of the soil from outside when the pool is empty. What the general public don’t know is that although the forces of the water don’t change much through a pools life , the forces from the surrounding soil do change. These forces are affected by things like : • Soil conditions – sandy , clay , shale , decomposed granite and underground water • Moisture conditions in soil , Subsidence or differential settlement • The close proximity of a building • Poor drainage for water run off etc As you can see there are many factors and forces that play on a swimming pool. If the above is a bit confusing and you would like to know more, contact  Mike  at mbruyn@mweb.co.za  .