How to calculate professional flooring on the roof: the size of sheets

Professional flooring, professionalist, corrugated artist, metallosifer is all the names of one class widely used in the construction of cladding materials from a cold-rolled galvanized corrugated steel sheet.

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Consumer popularity they won due undoubted advantages:

  • low price;
  • a slight weight that allows you to install with small labor costs;
  • ease of installation;
  • high operational qualities;
  • durability.

It must be said that modern professional flooring has long ceased to be just a sheet of profiled iron.

Today, this material has several layers of various protective coatings Of the polymer plastic materials that significantly increase its durability protecting against adverse natural and atmospheric impacts that improve heat and sound insulation that increase decorative properties.

Dimensions of sheets of professional flooring for the roof

First, it should be said that the standard marking profiled sheet Indicates its main purpose for use in construction and height of the wave, on which the load capacity of the material depends:

  1. C - walls. The digit with the designation shows the height of the wave, which for this species can be from 8 to 21 mm. It finds use as a wall facing material for non-residential structures of frame type: warehouses, sheds, garages. It can also be used to erect fences and fences.
  2. Ns - universal With additional ribs of rigidity. It can be used both for cladding walls and as their structural elements. The height of the corrugation of this type of professional leaf - 20 ~ 60 mm.
  3. N - Right, increased hardness, independently performing the functions of the construction frame. It can also be used to manufacture the beaming formwork of walls and overlaps in concrete work. Wave height - 57 ~ 115 mm.

Dimensions of the wave

For roofing A professional sheet with a wave height of at least 35 mm should be applied, that is, starting from the brands of NS35 and above. At the same time, the sheets of the brand N are used for the manufacture of the Large Roofing Roofs. For individual housing construction, the most suitable brand NS35 ~ 44.

At the same time, the leaf with a bolt height of the corrugation should be applied where there is more snow and wind load on the roof. The methodology for their calculation can be found in applications G and D to SP 20.13330.2011 "Loads and Impact". There you can also find cards of snow and wind impacts in various regions of the Russian Federation.

For example, for the Moscow region in accordance with the calculation of this procedure on the roof with an angle of inclination of 40 °, which is at a height of 5 to 10 m, the snow load will act about 125, and the wind - 15 kgf / m². In sum, it gives 140 kgf / m². For the regions of the Far North, this value can reach 600 ~ 750 kgf / m².

Width

It should be distinguished width general and useful. The latter is determined by the width of the corrugation for the vertical flystone sheets. Usually this value is a width of a single metal wrestler. Modern profiles have a special form of extreme waves for overlapping sheets, and the assembly width is indicated in their marking.

Let's say in the designation of the NS44-1000, the last digit - 1000 indicates the useful width of the corrugular in mm. In technical specifications, another figure, for example, 1044, can also be indicated. It shows the overall width of the proflist.

Sheet thickness

The thickness of the roof professional flooring is usually from 0.36 to 1.2 mm. It depends on it, on the one hand, the strength and carrying capacity of the material, on the other - its weight, as well as the price. Therefore, when choosing a material, you should navigate the optimal values. Values \u200b\u200bup to 0.45 mm are characteristic of economy class products. To use as a roofing material, choose a sheet thickness not lower than 0.45 ~ 0.5 mm.

The corner of the slope (tilt) roofs of the corrugated

In the force triangle of the distribution of loads on the roof the corners of the roof rods are played a big role. to the base line.

A gentle low roof is the main impact on the weight of the snow on it, and when the slope of more than 60 ° can already be taken into account for any roofing. For angles from 25 to 60 °, the weight of the snow load is taken equal to 70% of the maximum. But but the coolest roof will be subject to considerable loads from the wind: with increasing inclination from 15 to 60 °, they are enhanced by more than 5 times.

For the roofs of a corrugated floor, characterized by small holding properties for snow, the load from it can be ignored already starting with the angles at 45 °.

Single car

Feature of a single roof system It is that the entire amount of loads and opposition to them must fully provide a rafter system. If in a bartal roof the side loads on one row of rafters are partially compensated by the other, then there is no such counteractive roof from a profile of such a counteraction. Therefore, so as not to make a powerful rafter system, for the roof of this type, a small angle of the slope relative to the baseline is chosen, not exceeding 30 ° C.

Double

Diva-type roof type several of its configurations:

  • symmetric and asymmetric, with different angles of slopes or offset of the skate away from the central axis;
  • multi-level, or with longitudinal lanterns;
  • half-haired;
  • loars mansard.

Duscal roof house projects usually provide for the presence of an attic or indoor room. In order to obtain an acceptable height, the angle of inclination of the slopes increases sometimes up to 60 °, while reinforcing the solo system to compensate for wind loads. But as the experience of many generations of builders shows, the most optimal over the amount of influences and loads with a range of tilt angles for a simple bartal roof is 35 ~ 50 °.

How to calculate the number of professional flooring on the roof?

How to calculate how much need professional flooring on the roof? The most simple will be calculation of a single roof. For him you should know the total length of the side of the roof:

L \u003d w / cos (arctg (h / w)) + s1 + s2 + 4 cm, where

  • H - the height of the skate on the roof base;
  • W - the width of the base;
  • S1 and S2 - the length of the scenes from the same side. The length of the soles is usually taken in the range from 20 to 50 cm.

Dividing this value to the length of the sheet of professional flooring and rounded in the large direction, we obtain the preliminary value of the horizontal series of roofing. Sheets of roofing material are stacked with overlap depending on the angle of inclination:

  • 20 cm - less than 15 °;
  • 15 cm - 15 ~ 30 °;
  • 10 cm - more than 30 °.

The total length of the required material in the vertical row will be equal to the accounting of horizontal goals:

LO \u003d (R - 1) * 2 * P + R * WM, where

  • R is the number of horizontal rows of the proflist;
  • P - the width of the overlap indicated above;
  • WM - the width of the corrugated person.

If the resulting value is exceeding the total length of the sheets from the preliminary calculation, another row of shortened sheets should be added, after re-calculating. Reduce the height of the horizontal series by a significant increase in the inlet of the corrugations is not recommended - this will increase the overall weight of the roof. It is better to shorten them in one row.

Under the same method, the number of vertical series is calculated by dividing the length of the roof of the roof on the useful mounting width of the corrugated person, taking into account the vertical outdoors equal to the width of the same wave.

For a bartal symmetric roof The calculation of the roof of the roof is made similarly for each slope. The width of the base w is divided in half. The calculation of the roof of a more complex configuration is performed by dividing it into fragments. In this case, such fragments may have the shape of triangles, trapezium, which significantly complicates the calculation. To relieve it, there are specialized computer programs both stationary and online operating, for example, on this site.

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