Evenness

A structural quality performance standard which states the maximum variation, measured in millimetres, either 1. below a straight edge which is laid onto the turf surface, or 2. where a bump is present, the difference between the bottom edge of a raised (on two blocks of wood) straight edge and the height to the top of the bump, this figure is then taken away from the height of the wooden blocks to give the height of the bump. For example, two wooden blocks are used with a height of 100mm, the measured height from the bottom of the straight edge to the top of the bump is 42mm; 100mm ¯ 42mm = 58mm, which is the height of the bump. Either a 2-m or 0.5-m straight edge are typically used.