Swimmer’s ear: What you need to know

permeable liner, and a frame or superstructure for supporting and reinforcing the sidewall. The frame assembly generally includes a lower rail and a top rail to that your pool sidewall is attached. The liner is attached to an inner surface of the pool sidewall along an upper edge.

History
Swimming being an organized activity dates back so far as 2500 b.c. in ancient Egypt. Actual swimming pool were invented in the very first century b.c. by the Romans. In Rome and Greece, swimming was the main education of young boys. Lots of the Roman pools were also heated using water diverted through piping from natural springs. The elaborate bathhouses designed with marble and expensive gilding were very popular with the elite society but many people continued to swim in lakes and rivers. These bathing pools were the precursors to current day swimming pools.

In Europe, many people refrained from building swimming pools as a result of fear that infections could be caught from infected swimmers. Europeans formed their first swimming organization in 1837 in London, which at the same time had six indoor pools. The popularity of swimming pools didn’t begin to increase until after the very first modern Olympic games in 1896.

Raw Materials
Raw materials for manufacturing swimming pools include polyvinyl chloride (PVC) plastic, galvanized steel or metal, fiberglass, concrete, and polyurethane foam. Adequate steel bars for reinforcing a concrete pool range in dimensions from 0.38 in (0.97 cm) to 0.75 in (1.9 cm) diameter (these values vary with regards to the structural requirements of the design). All piping employed for pool plumbing is no less than schedule 40 PVC or very same and must be stamped with American Society for Testing and Materials (ASTM) approval. The liners are generally plastics or similar materials.

Design
The variety of designs for swimming pools are a reflection of the unique spatial and economic concerns of the consumer. Concrete pools are the most flexible with the capability to create any shape or configuration. Vinyl-lined pools are evolving into free form designs that will incorporate a larger selection of design options with fiberglass pools having the most restrictive design elements (one-piece construction designed at the factory). Design drawings are completed showing the specific layout of the pool, including shape, elevation, and size. An engineer provides soil and structural analysis assisting in the positioning and optimal design for a swimming pool installation.

Soil analysis is completed on all surfaces just before installation to make certain a structurally sound pool. A pool also needs to have a system that circulates the water from the underside of the pool to the top to greatly help in the grade of the water. All pools must use grounded wiring and have breakers that protect from shorts in less than water lighting systems. 

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