A very important aspect of a ski/board base is its structure. Recall from , a board or ski does not slide on snow, it rides on water. As the base moves over the snow, the energy from the friction melts the snow. The base then rides over a small pool of water. The water then re-freezes after the base has passed. Therefore just as a car’s tires has threads, a ski or board should have structure to allow the water to flow unrestricted.
Most interesting, not all skis or boards have structure. Usually, a new ski has a structure out of the factory; however as people have their skis tuned, the structure may gradually fade if disregarded. In the back room of a ski shop, tuning machines have the ability to remove and apply structure. To remove structure, skis are driven over a sanding belt. To apply structure they are driven over a stone grinder, which has been cut with a diamond to apply a pattern to the ski.
When an economical tune is applied, a fine sanding belt maybe used as the last step, thus eliminating any structure. A racer or high performance tune is usually finalized with the stone grind, which imbeds a new structure to the ski /board. (See photo).
There are many technicians that believe that the structure is the most important part of the tuning and should not be overlooked. A good structure will not only provide speed but better control. Be sure that your tune up includes a base structure!