A vert ramp is a form of half-pipe used in extreme sports such as vert skating, vert skateboarding and vert BMX. Vert ramps are so named because they transition from a horizontal plane (known as the flat-bottom) to a vertical section on top. The typical height of a vert ramp is 11 ft (3.4 m) to 14 ft (4.3 m) with anywhere from 6 in (150 mm) to 2 ft (0.61 m) of vertical on top. Vert Skating ramps can be made with 6 in (150 mm) to 1 ft (0.30 m) of vertical while Vert skateboarding ramps are made with 2 ft (0.61 m) of vertical in order for the skateboard to launch straight up into the air.