-Austria: the Austrian structural type II (Eyc ≥ 161MPa) with its top is hot, tight grained BTN C < 3 cm thickness 12.5 4 cm (minimum thickness Regulation) but still construction to save costs, are watered pitch 0.5 kg/m2. 5 cm thick layer of particle BTNC high standard agreement with C19 with specified minimum thickness, watering the pitch 1 kg/m2. Between the layers on the top and CPDD BTN had plastic irrigation seepage 19 cling (1 kg/m2) to increase your chances of sticking sticking ability and waterproofing. Between 2 layers of plastic irrigation also BTN stick sticking (0.5 kg/m2). Distribution level gravel with 2 types of rock layers and thick lashes about 30 cm.
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