Why do they call it a half-pipe?
Why do they call it a half-pipe? 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. Originally half-pipes were half sections of a large diameter pipe. What is the difference between a quarter pipe and a half-pipe? Half pipes What do you get when you put two quarter pipes together? A half pipe! Half pipes present a controlled area where a skater is constantly moving back and forth between the two quarter pipes, allowing them to build...