A half-pipe is a structure used in gravity extreme sports such as skateboarding, snowboarding, skiing, freestyle BMX, skating, and scooter riding. == Overview == The structure resembles a cross-section of a swimming pool, essentially two concave ramps (or quarter-pipes), topped by copings and decks, facing each other across a flat transition, also known as a tranny.
A half-pipe is a structure used in gravity extreme sports such as skateboarding, snowboarding, skiing, freestyle BMX, skating, and scooter riding. == Overview == The structure resembles a cross-section of a swimming pool, essentially two concave ramps (or quarter-pipes), topped by copings and decks, facing each other across a flat transition, also known as a tranny.
Source: Wikipedia "Half-pipe" · CC BY-SA 4.0
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