Concrete paving-stone, has vertical teeth including spread tooth, narrow tooth and tooth spacer with essential smaller depth than depth of spread tooth and narrow tooth, where tooth spacer tapers from foot side toward side of head
摘要
<p>The paving-stone (1) has a group of vertical teeth located at an outer raster track (2) in a middle region (M). The vertical teeth includes a spread tooth (3), a narrow tooth (4) i.e. pitch circle arc, and a tooth spacer (5) with essential smaller depth than depth of the spread tooth and the narrow tooth. The tooth spacer tapers from a foot side toward a side of a head. The spread teeth and the tooth spacers are constructed such that the pitch circle arc is cut in the middle region and shifted apart pitch circles that are connected by a straight line.</p>
