Building a half-pipe on grass is generally not ideal, as the uneven surface can lead to instability and increased risk of injury for skaters. Grass may also absorb moisture, making it slippery and less durable. For safety and performance, a solid surface like concrete or wood is recommended, providing better traction and support. If grass is the only option, consider using protective mats or building a temporary structure that can be easily moved.
Search in google: free halfpipe plans or free ramp plans. Usually get at least a page of good results
Use wood, it's the cheapest and the safest way. If you build your halfpipe properly it should last for years. Cover it up in the winter though. Try http://www.buildhalfpipes.com/ They seem to know how to build them the right way.
try Zumiez.com or build one your self
how high are the walls at the 2014 halfpipe
Shaun White of the United States won the gold medal in men's halfpipe. Ayumu Hirano of Japan won the silver medal in men's halfpipe. Scott James of Australia won the bronze medal in men's halfpipe.
Chloe Kim of the United States won the gold medal in women's halfpipe. Liu Jiayu of China won the silver medal in women's halfpipe. Arielle Gold of the United States won the bronze medal in women's halfpipe.
pandas use grass,leaves,bamboo and sometimes rock's
Yes.
Ayumu Hirano of Japan won the silver medal in men's halfpipe.
Scott James of Australia won the bronze medal in men's halfpipe.
Liu Jiayu of China won the silver medal in women's halfpipe.
good