In individual construction, rafters are often installed by their own hands, but this process takes a lot of time and is considered very laborious. Therefore, you can not make mistakes during installation in any case. From the correct implementation in the future will depend on the strength and reliability of the entire roof. Depending on the type of installation chosen, the order of work may be slightly different, but the principle remains the same, which involves the creation of a reliable frame for the roofing and roofing. Before the installation of the rafter system, you should determine the shape of the top of the house and the coating. The distance between the bars and their section will largely depend on these parameters.
When going to install rafters with your own hands, you need to know that there are layered and suspended structures. In the first case, the bars rest on the special supports and walls of the structure. Racks can be placed in the center or in two rows, while allowing the width of the entire rafter system to be increased. With regard to suspension structures, then with this option, the ends lie on the tightening in the form of a horizontal bar. It, in turn, rests on walls or a wall beam. Thus, the rafter's legs will not be able to part ways.
If the rafters are carried out by their own hands, then it is necessary to know at least approximately the front of the work. It is recommended to begin with the manufacture of the truss frame stencil . It is done with the help of boards, which are arranged in the form of scissors. Free edges are placed on the supports, and the transverse crossbar fixes the resulting angle. By this pattern, the rest of the rafters are performed. They are fastened together by nails or self-tapping screws. Two finished farms are installed on opposite edges of the structure. From one skate to the other, a cord is stretched, allowing to level the other rafters.
When the installation of rafters with their own hands, depending on the effect of different forces, the optimal ways of connecting the elements to each other are selected. For reliability, staples, clamps, bolts, crossbars, struts and the like are used. At the top, the connection is made by a spike in a half-tree or a slotted way. Also the bars should be well fixed in the wall part with a spike or tooth. It is strictly forbidden to make a cutting closer than thirty centimeters from the edge of the tightening, otherwise the reliability of the design will be in question.
The rafters are further strengthened with their own hands using bolts and clamps. The latter are much more reliable in this regard, because metal fasteners violate the integrity of the wood, causing rotting and reducing strength characteristics. In the rafter's leg, the bolt is also cut into the half-tree, and also reinforcement is done at the expense of the nagel. Do not interfere with the additional reinforcement of this node with a staple. In the presence of compound puffs, the splice is made by an oblique or straight tooth, and the metal covers are tightened with bolts.