This is a complete detailed structural CAD drawing of an Overflow Type Swimming Pool Retaining Wall with gutter detail, taken from real life projects. It can be imported into any pool structural design project and used as a standard reinforcement detailing for construction.
Overflow pools are very common as they give the impression of a larger water body compared to regular skimmer type pools. Overflow pool edges can be installed either on all sides of the pool or partially. Water that runs off is trapped into the gutter around the pool through a copin grade. The gutter must be constructed with a sloping floor surface so that the overflowed water is collected and directed into a balancing tank.
The gutter size can vary, and it can also serve as a balancing tank. As a rule of thump, balancing tanks need to hold 10% of the pools water volume and this will determine the depth and width of the gutter. Usually, gutters are not big enough thus needing a separate balance tank. Therefore, overflow pools usually have a separate balancing tank.