This technique is easy to learn, but can result in serious injury when accidents occur. Climbers should have the opportunity to practice chimneying in a relatively forgiving setting, such as a playground.
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The design is based on repeatable plastic panels and steel tubing. The tubing is triangulated similarly to that of jungle gym. The panels are a warped hexagon-like shapes, and they double as the joints that hold the tubes together.
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The tubes are spaced 1.5" away from the outside of the panels. As a result, they can double as climbing holds.
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The panels are also arranged with a 1.5" gap between each one. There are no holds on the inside faces of the panels.
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The gaps enable crack climbing on the inside of the structure.
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The void between each half of the structure is roughly 6.5'. This makes it easiest for climbers between 5' and 5.5' to practice chimneying.
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Play Helix

The Play Helix is a freestanding playground structure which enables a technique called chimneying. There are some products that already enable this type of climbing, yet they aren’t well suited to other types of climbing.

On the Play Helix, the chimneying technique is a kind of “easter egg”, which only a few adventurous climbers will discover on their own. Everyone else can engage in more obvious methods of climbing.

Geoff Pitts
Industrial Designer Atlanta, GA