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A Longitudinal Study of Playground Surfaces to Evaluate Accessibility - Final Report

Rotational Penetrometer.  A wheelchair caster placed on a spring loaded caliber in a metal tripod frame which suspends the caster about 6 inches over the surface.  When the caster is released, the spring load gauge replicates the force of an individual in a wheelchair over a given surface.  The penetration into the surface is measured for readings of “firmness” and “stability” of the surface. 

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