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performance surface : ウィキペディア英語版
performance surface
A performance surface is a flooring suitable for dance or sport. Performance surfaces are normally laid on top of, or are part of, a sprung floor to produce a complete dance floor or sports floor.
Dance performance surfaces made of sheet vinyl are also called dance floors and marley floors. They are called marley-type floors from a very popular reversible vinyl flooring manufactured for years until about 1978 by Marley Floors Ltd.〔(Entertainment Flooring Systems ) Frequently Asked Questions〕
Theatres often have a number of roll-out floors with different characteristics to satisfy the requirements of different forms of dance.
This article deals mainly with the customization of a floor for different activities by the use of different surfaces. The sprung floor article deals with the basic requirements and construction of floors to make them suitable for dance and indoor sports.
== Requirements ==

The sprung floor article outlines some of the different standards with regards to the performance surface of a sports floor. Below are some of the key factors that can influence the performance surface required within a sports facility.〔(Dynamik Sports ) Academy Floor〕
* Shock absorption- The amount of an impact that is absorbed by the floor (Usually measured in %)
* Vertical deformation- The average distance the floor deforms under impact (Usually measured in mm)
* Rolling load- If the floor can withstand a weighted trolley being wheeled across the surface (A set weight is defined and the outcome is usually yes/no or pass/fail)
* Ball rebound- How much a ball bounces off the surface compared to what it would when being bounced on a concrete surface (Measured as a % against the bounce on a concrete surface)
* Slip resistance- The level of grip the surface has (Measurements vary depending on standards)
A sprung floor with a hard surface provides protection from serious injuries rather than minor injuries. A fall can still cause bruises. A soft performance surface on the other hand can provide protection from minor injuries but not serious injuries. Providing sufficient protection from serious injury for adults using a thick performance surface alone would render it unsuitable for most dance or sport. This is because a performance surface is point elastic whereas area elasticity as provided by a sprung floor is mainly preferred.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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