The construction point (German: Konstruktionspunkt), also known as the K-point or K-spot and formerly critical point, is a line across a ski jumping hill. It is used to calculate the number of points granted for a given jump. It is also called calculation point or calculation line.
Classification
The distance between the construction point and the take-off table, measured in meters, was formerly used to classify the size of a ski jumping hill. Since mid-2004, the hills have been categorized by the hill size.
Ski jumping competitions are based on a point system which combines points for length and style. The distance points plus the judges' marks result in the total score.
For hills up to large, the scoring system grants 60 points to jumps that reach the K-point.[3] For ski flying hills, 120 points are granted for the K-point length. Distance points are calculated based on the hill length, added for each meter beyond the K-point, and subtracted for each point shorter than the K-point. A meter has more distance points in smaller hills.[4] For example: On a K120 hill (Calculation point 120 m) the meter value is 1.8 points. So a 122 m jump would be worth 63.6 points, and an 118 m jump would be worth only 56.4 points.