Round pools have equal water pressure all around the pool. That is why they do not require any additional braces to support them. Oval pools are quite different. On an oval pool, the narrow sides of the pool have more pressure than the curved ends. Therefore, these pools require additional bracing on the sides to maintain their shape. These braces are available in two types. The most common and easiest to install is the Buttress oval. (sometimes called K-brace) This system uses braces that extend approximately 33” from the base of the wall and have a second brace that reaches to about the middle of the upright. It is important to consider these braces when choosing the position of the pool in your yard so that you can accommodate them. The other type of bracing system is called Braceless, compact, or Yardmore. These systems use pressure plates under the pool and heavy gauge steel beams to support the lateral pressure of the pool. Since the plates are under the pool, these braces only extend approximately 10” away from the base of the pool. Because of this, they do not extend past the 15-18” landscape perimeter around the pool saving space in the yard and making it easier to mow around.
Example Oval Brace System
Example of Braceless/Yardmore Oval Pool