We calculate the rafter system

Burned clay tiles in its total mass is one of the most severe roofing coatings. This weight is a consequence of great thickness and, accordingly, the strength and durability of the material. It is through exorbitant weight to the roofing flooring that special attention should be paid to the construction and preliminary calculation of the rafter system. This calculation takes into account the total weight of the coating and the wind and sedimentary features of the regions in which the coating for the home will be built.

The factor of using the attic coating is very important, so if the attic is equipped in a residential attic, then the roofing system is insulated using sheets or matches of fiberglass or mineralized cotton wool, which does not significantly affect the total weight of the structure, but fundamentally changes the design of the roof of the roof.

Also, an additional load on the roofing system gives the elements of the sheathing and decoration of the frame of the rafters (sheets of drywall plates, fugues and balls of gypsum mixtures). If you compare the heavy rafter structure and light (for further coating with tin or metal tiles), then for the first case, the rafter elements should have the thickness of the cross section twenty -five percent more than for the second. In the same way, for a heavy system, rafters with a length and height of eight by sixteen are used, in a light structure six for sixteen.