Click any chart to view Youngs Modulus data table
Before 1950's - Inground pools were only made of concrete.
1950's - Inground pool wall material started with wood. Low strength and low longevity.
1960's - Inground pool wall material transitioned to steel. This added strength but little in additional longevity.
1970's - Inground pool wall material transitioned to plastic structural foam. Plastic pool walls added greatly to longevity but reduced strength dramatically from steel or wood.
2000's - Inground pool wall material using NEW Highly Reinforced Composite Material Technologies allows superior strength to meet or exceed steel with unsurpassed longevity.