This article is about penile erection. For the similar arousal in females, see clitoral erection. For other uses, see Erection (disambiguation). An erection (clinically: penile erection or penile tumescence) is a physiological phenomenon in which the penis becomes firmer, engorged and enlarged.
The obstacles in the menâs steeplechase are 914 millimetres (36.0 inches) high. In the womenâs steeplechase, the obstacles are 762 millimetres high (30.0 inches). The water jump consists of a barrier followed by a pit of water. The landing area for the pit of water is 3.66 metres (12.0 ft) by 0.70 metres (2.3 ft). At its deepest point, the slope goes down to a depth of 700mm (28 inches).
1 The minimum amount of tread, which provides a secure grip, is around 3.5mm - about the depth of a match-head. 2  Less than 1.6mm is an offence by law. 3  In wet conditions, 3.0mm or less means that your traction and stopping power is greatly reduced.  When driving in snow, traction can be compromised at 4.75mm tread depth.