rafters
The rafter system is an important element of the roof structure, the reliability of the future depends on the correct calculation of which.
When developing house projects, an appropriate roof structure is necessarily selected. After all, it is the roof that gives the appearance
The truss structure is the basis for any pitched roof, its "skeleton". She takes on
The roof structure of a building object for various purposes is subject to various loads - the weight of the natural roofing