By giving the surface a decrease, it must be determined by its size and direction. The value of the inheritance is most often determined in percentage; it usually ranges within the borders 0,5-5% and is usually proportional to the unevenness of the surface. Yes, for example. the smallest decline (0,5-2%) require sanded surfaces of cut stone plates, Smooth concrete surfaces and carefully made asphalt surfaces. The largest declines (3-5%) require a cube surface, crushed stone or cobblestone. Transverse declines given to surfaces can be one -sided or double -sided. Small width road surface.
Very difficult under- It is technical to take rainwater from roads located in areas with rich sculpture. Such water flowing along the roads causes them to be blurred, and they can even lead to complete destruction. Sometimes it may happen, which usually leads to the destruction of the road surface. Therefore, in such cases, by giving the path appropriate transverse declines, rainwater is directed to the side of the road, from where they then flow to specially made and fortified sewage gutters, which are brought to the channels, tanks etc.. In areas with a rich sculpture, broadcasting transverse declines is also necessary in relation to permeable surfaces, because it protects them from destruction by flowing water in the event of a rapid storm rainfall. Rainwater flowing down from the surface should not be discharged to the sewage network, but use to fill the joints, irrigation, etc.. However, keep in mind, that sometimes directing such waters to small tanks (Ponds and garden pools) can cause significant pollution.
Excessive inclination of pedestrian roads may hinder their navigating them, and even pose a threat. This is of particular importance in winter due to the ice formed. Therefore, it is necessary to avoid building roads with a longitudinal decrease 10%. On the episodes, on which such a way can be found, in which large declines will be avoided, The surfaces with greater adhesion should be built (np. from ankle or cobblestone) or build steps, and even stairs.