How to accurately calculate roofing profiling - instruction
Professional sheet is a modern roofing material, which is a corrugated galvanized steel sheet with a polymer or paint coating. It is appreciated for reasonable price, durability and practicality, therefore it is widely used in private low-rise housing construction. In addition, knowing how to calculate roof sheeting and properly cut, you can significantly save on roofing work. There are special programs that help to quickly determine how many sheets will be needed to overlap roofing ramps, but these calculations can be done independently without using a calculator. In this article we will describe how to independently carry out an exact calculation of the required amount of professional sheet.
Design
It is necessary to begin the calculation of the required amount of professional sheet with the design of the roof, the creation of a diagram or a drawing. During this process, it is necessary to accurately determine the number, shape, size, slope of the roofing slopes, since it depends on these parameters how many sheets of corrugated flooring are required, and what brand can be used. Depends on a design:
- Thickness of a professional leaf. On structures with a slope of less than 45 degrees, the snow lingers on the slopes, creating an additional weight load on the floor and the roof frame of the structure, therefore, they use profiled sheeting with a large thickness. The steeper it is, the thinner the decking can be used to overlap it. Sheet of thick steel billets has a higher strength and carrying capacity, but it costs more.
- The magnitude of the vertical and horizontal overlaps. In the calculation of the material will necessarily include a coefficient reflecting the amount of slope of the roof, as it depends on the layout of the coating. Sheeting stacked overlap to the joints between it turned out tight. The steeper the roof slopes, the less recommended overlap. For structures with a slope of 12 degrees, it is recommended to observe an overlap of 25-30 cm, which reduces the usable area of one sheet and increases the consumption of material.
Обратите внимание! Design и точный расчет необходимого количества профлиста помогает сократить расходы на кровельные материалы, избежать ошибки при раскрое и минимизировать отходы. Упростить вычисления поможет онлайн-калькулятор, в который нужно просто ввести размеры, число и уклон конструкции. При определении оптимальной формы и вида конструкции учитывают климатические условия региона строительства и формы сооружения.
Calculation using the calculator
A modern calculator program, which is in the public domain, can count in a few seconds how much professional sheet is needed to construct a structure. To do this, simply enter the original data: the number of rays, their shape, size, and slope. The programs allow you to perform the calculation quickly and accurately enough, in addition, they have additional functionality:
- Fast and accurate calculation of the necessary materials for the roof of complex shape.
- Automatic construction of the roof scheme and the implementation of the optimal cutting cover.
- The ability to change some parameters and compare the results in order to reduce material consumption and costs.
- The ability to accurately determine the required number of additional elements of the roof of the professional sheet (ridge profile, plugs, junction bars, valleys, wind slats).
Note that the calculation made by machine, has high accuracy and allows you to quickly visualize the project of the roof. The more complicated the roof design, the greater the error in manual calculations, therefore, to calculate the required amount of materials for multi-skid structures, it is better to perform using a calculator program.
Main settings
The principle of calculating the required number of sheets to cover the roof is based on simple mathematical formulas, the calculation of which can be easily performed without using a calculator. To do this, you need to know the exact dimensions (length and width) of the roof, taking into account the overhang, as well as their slope. Further calculations are based on the following parameters:
- Square stingray. It is determined using trigonometric formulas depending on its form. If the surface of the roof has a rectangular shape, to perform the calculation of the area of the roof, you need to multiply its width by the length. If the roof is asymmetric, the calculation is performed separately for each ramp to avoid errors in determining the required amount of profiled sheet.
- Area sheet profiled. In the course of calculating the required amount of material, the useful area of the corrugated sheet, and not the full one, is taken into account. This indicator reflects the size of the profiled sheet covering minus the overlaps; it depends on the brand, number, height of the roofing waves and the pitch of the structure. The smaller the waves of the material and the smaller the slope, the smaller this indicator and the greater the consumption of corrugated flooring.
Important! When calculating the required amount of profiled sheeting, it is not recommended to use the useful area of the material specified by the manufacturer, since it is an average indicator that does not take into account the roof slope. The calculator program performs calculations more precisely, since it calculates this indicator of the professional sheet in accordance with the design of the roof.
Counting technology
Even without using a calculator for calculations, you can quite accurately determine how many sheets of corrugated board will be required to overlap the roof. To avoid an error, you must accurately measure the length, width and slope. Further calculations are made according to the following scheme:
- First, the area of the slope is determined. If the roof is a double-slope, it has a rectangular shape, and its parameter can be calculated by multiplying the width by the length of this geometric figure.
- Then determine the total area of the roof, adding the area of individual parts. If the roof is symmetrical, then make it easier.
- Calculate the useful area of the sheet profiled, taking into account the size of the horizontal and vertical overlap.
- Determine how much material is needed by dividing the total surface of the roof by the effective area of a single sheet. This figure is rounded up.
- They estimate how many sheets are needed for the horizontal row of the roof, dividing the width of the slope by the useful width of the profiled sheet.
- Estimate how many sheets need horizontal rows. For this, the length of the slope is divided by the useful length of the material.
- In conclusion, calculate the required number of additional elements, given that their standard length is 2 m, and the recommended overlap is 10-20 cm.
Experienced craftsmen argue that there is a way to facilitate the calculation of corrugated flooring to overlap the roof. To do this, you must purchase a professional sheet, the length of which corresponds to the length of the slope. This technology allows to reduce horizontal overlaps, as well as reduce material consumption.
