When builders build the loading walls of the buildings, they seem to be automatically already done with a margin of about 200%, of course there are times when, when building the building, half the cement and other building materials, and then after some time the structure will collapse from the wind, or even itself yourself, such cases are also found. The design of the roof must be correctly calculated, everything should be individually here, you can not rely on the calculation of those. People who built a roof, for example, a neighboring house. Well, of course, if your house is 6x6m, then there is, as it were, without options, any cropped board can approach the manufacture of rafters. But we will not consider this option and we will take, for example, a house for 250 square meters. m, in this case, if you make an incorrect roof calculation, then this can turn into big problems for you in the future.
Before designing a pitched roof, you need to, firstly calculate the rafter structure. For calculation, you can attract a designer-designer, he will be able to check the bearing capacity of the supports, will also be able to decide which rafters need to be used.
In this case, to predict in advance what the rafter structure will not work out. To here I repeat everything individually. If you are building a house in size 6×6 m, then here the technology is worked out and problems with the rafter structure are unlikely to arise. The loads that the rafters will be taken can be divided into two types of temporary and constant, the constant one can include its own weight of the roof, the seasonal nature of T. e snow, rain. Minimum load per 1 sq. m which should withstand the rafters is 200 kg, in winter this indicator can be doubled.
Floor tiles for the kitchen should be primarily characterized by increased resistance to damage to. K in the kitchen, sharp objects that can damage the tile often fall on the floor.