How to calculate the height of the ridge roof

When building any building, one of the most significant moments is the correct calculation of the height of the ridge of the roof, as well as its area. With a low ridge height on the roof a large amount of snow can accumulate, which will create an additional load on the entire structure. On the other hand, with a sufficiently high ridge and a large surface area, the windage of the roof increases, which can be a problem with strong winds. Therefore, it is important to know how to calculate the height of the ridge of the roof, preventing its premature destruction.

Roof design features

When designing any building, it is important to correctly calculate roof parameters. Here all possible loads should be taken into account, as well as the required amount of roofing materials. In this case, one of the main parameters will be the correct slope of the construction ramps. In typical gable roofs, slopes usually have a slope of 12–45 degrees. The direct dependence of this angle of inclination on the loads created by the weight of the roof on the entire structure of the roof of a building is known.

Note! It is necessary to make additional strengthening of the truss system, which will entail additional construction costs. If you reduce the slope of the slopes, then there will be an increase in the load on all structural elements due to precipitation.

It is equally important to correctly calculate the rafter system. It is caused by the transfer of the total load from the rafters to the bearing walls of the building. In turn, truss legs are determined by the size of their cross section and length. Such structural elements are selected on the basis of what the actual loads are on the roof, taking into account the angle of the slopes. To ensure the required margin of safety, experts recommend slightly increasing the results of calculations of the thickness of the rafter legs.

Since the roof configuration may be different, the calculation of the required parameters will be made depending on some features. For the correct calculation of the height of the roof should always take into account the number of slopes and its shape. Neglect of such characteristics will lead to errors in the calculations. Without such data, it will be impossible to determine the area of ​​the roof, as well as to calculate the required amount of materials for roofing. The height of the ridge affects the length and configuration of the rafters.

Main settings

Constructing your own house, each owner will definitely face the calculation of the height of the roof level. Before determining such a parameter, it is necessary to consider the following nuances:

• the number of skates;
• the presence of a residential attic or attic;
• slope angle, taking into account possible precipitation;
• selected roofing material.

In this case, it is necessary to take into account the simple dependence of the amount of precipitation and the slope of the slopes. The amount of material required for roofing can be determined by pre-calculating the height of the roof. In practice, a slope of 45 degrees implies an increase in the cost of the roof by 1.5 times compared with the construction of a flat ramp.

It is believed that the regulatory requirements for the building determine the proportions and height of the roof ridge. Meanwhile, such a parameter can be calculated, knowing the actual dimensions of the walls of the structure. The calculation of the height of the ridge can be determined using the simplest geometric formulas. To do this, you need to know the width of the structure, as well as the angle that determines the slope of the roof slopes.

Calculations

Parameters such as the height of the ridge of the roof and the angle of its slope are directly related. In addition, the selected roofing material also affects the angle of inclination of the roof. For example, soft tile can be laid on the roof, which has a slope of 11–90 degrees. Ceramic tiles require a gradient of 60 degrees.

It is also necessary to take into account the aesthetic component, so you should provide that the height of the ridge of the roof of the building matches the height of the building. The fact is that an overly flat or too high roof can adversely affect the appearance of the structure. Considering the existing climatic conditions, the best option is considered to be the angle of inclination of the roof, which is 35–45 degrees. The roof, which has a flatter structure, will be subject to increased loads due to precipitation.

If we take the height of the ridge as one of the legs of a right-angled triangle, then the other will be half the width of the building. Accordingly, the length of the slope will be considered hypotenuse. In accordance with the trigonometric formula, the length of the leg in such a triangle will be equal to the length of the second leg, multiplied by the value of the tangent of the angle at the base. For example, take a building width of 6 m with a roof slope angle of 40 degrees. Referring to the Bradis trigonometric table, we determine the tangent of an angle of 40 degrees. It will be equal to 0.83. It turns out that half the width of the house - 3 meters must be multiplied by 0.83. As a result, we obtain the height of the ridge of the roof of such a building, which will be 2.49 m.