The influence of the temperature and the structure of snow on the roof covering

Analysis of the highest snow load is important in the process of designing of a roof structure. It is also necessary to take into account a coefficient of snow friction in addition to the main stages of calculation. This parameter may depend on the structure and temperature of the snow and the coating material. The dependence of the friction coefficient of these parameters were determined using techniques developed by research and testing laboratory “Polytech-SKiM-Test” with using of tribometer. Various snow conditions and two types of roof coverings - PVC-tent and Pural were considered in the research. The results of experiments are the dependencies of the coefficient of friction on various materials and slipping speeds. Moreover, values of frictional forces of the snow on the coating at different temperatures were defined.