To make the rafter fit snugly to the beam, you need to attach it to the place of attachment and note where the cut will be made. If one additional support is used, then the distance will be 12 meters, and for two - already 15 m. The width of the rafters can be increased by introducing additional supports. The vamps can only work if the distance between the supports does not exceed 6.5 meters. When installing the rafter system of a gable roof, the use of hanging rafters is advisable where there are no intermediate supports. The advantage of such a roof is its low weight. The ends of the rafters should rest on the walls of the structure, and their middle part on the walls or supports, so their elements work like beams - on bending. Intermediate column supports are also suitable. If there is an average load-bearing wall, then it can be used as a base for lay rafters. The choice of one of the types of rafters depends on the size of the roof and the design of the house. Since this design creates a substantially bursting force in the horizontal plane, a wooden or metal tightening device is required at the base of the rafters. Hanging rafters rest on the extreme supports, so they work both on compression and on bending. There are only two types of rafters - hanging and layers. They can withstand the weight of the roof, and the weight of what has accumulated on it, so they are chosen with a margin. Rafters - this is the main structural element of any gable roof. In most cases, knowledge of any complex mathematical formulas is not required, since the most popular types of roofs are assembled from rectangular or triangular shapes. Before making a gable roof, the entire area of the future structure is divided into simple elements, and calculations are carried out for each of them, after which the result is added. It is worth saying that in the case when rolled roofing materials or soft tiles are used, the length of the slopes will be reduced by 70 cm. Please note that parapets, overhangs, and firewall walls are also required.
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