Looking at the snow -covered city, it does not think about the roofs with whitening hats about what kind of load the building structures are experienced in the winter. And the load during this period on construction projects is very large. Only one square meter of dense snow 15 cm thick has a weight of about fifty kilograms. A similar load is provided by ceramic tiles or concrete. Therefore, control over its number must be carried out constantly, and in time to clean.
Snow in the winter is common phenomenon. And, as a rule, it causes positive emotions in the population. And only the crumbling designs of houses, especially during the construction period, suggest that sparkling white hats, harmless at first glance, can carry a serious danger.
When designing houses and other buildings, the future load on the roof of not only precipitation, but also winds is taken into account. In calculations, the angle of inclination of the roof is always taken as a basis. The sharper the roof, the less danger of destroying it from snow. He rolls from her on his own. On more flat structures, the accumulation of precipitation must be monitored, snow removal from the roofs should be carried out even before the creation of a critical mass.
Sometimes increased load on the structure is created due to a sharp change in weather conditions. The alternation of plus and minus temperatures leads to icing and increasing ice cover. Under such conditions, the pressure on the roof is already not 50 kilograms, but many times more. In addition, it must be constantly taken into account that under freshly matured snow, there can be an ice crust, which carries a certain danger when cleaning, with its sliding effect.
Many roofs are not designed for more than 70 kg/m. sq, therefore, the intervention of special equipment and specially trained people is required in case of suspicion of excess loads.
If with sharp roofs it is more or less clear, then on flat roofs the level of danger can be increased, since the accumulation of precipitation in the cold period and ice on them occur much faster. From such roofs, snow can not slide independently, and only constant control and attracting special services will be allowed to maintain building structures.
What dangers are precipitation to building structures
It can be:
Ice.
Damage to the roof from freezing. Cracks may appear in the roof, and the roof will begin to flow.
Clogging gutters and their destruction.
Sudden gathering of ice and snow.
The threat of security of people near such buildings is great, so the timely cleaning of accumulated precipitation from the roofs will give positive results and protect both the surrounding people and the structure itself from destruction.