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#152 - kontraband
Reply +5
(07/26/2013) [-]
Here's the response for the Soledad Public Works Department:

For sand playgrounds: Spreads easily outside of containment area. Small particles bind together and become less cushioning when wet; when thoroughly wet, sand reacts as a rigid material. May be tracked out of play area on shoes; abrasive to floor surfaces when tracked indoors; abrasive to plastic materials. Adheres to clothing. Susceptible to fouling by animals.

For wood chip playgrounds: Low initial cost. Ease of installation. Good drainage. Less abrasive than sand. Less attractive to cats and dogs (compared to sand). Attractive appearance. Readily available.

Playground wood chips have been used for some time as a surfacing material. This tends to be the lowest cost option, while still retaining excellent safety characteristics.

The critical height of a material is a measure of how well it protects someone who has fallen from a height onto it. It should be noted that the critical height is not a guarantee that no injury will result from a fall of that height. Rather, it is the standard level of protection recommended for a playground containing equipment of a given height. Wood chips have a better critical height than most traditional playground materials, including various sizes of sand and gravel.