Decking and its dimensions: choose the right one. How to economically and safely make a roof from a profiled sheet Metal sheets for a roof dimensions

Profiled sheet is a modern, beautiful, strong and durable roofing material. To accurately calculate the required amount of this coating, you need to know the length, width and thickness of the sheet. In addition, information about the weight and load on the roof is needed. This will make it possible to correctly make rafters and other roof elements, as well as choose a brand of corrugated board that meets the operating conditions in the construction region.

Roof sheet dimensions

The main parameters of the profiled sheet are its length, width, thickness and height of the profile. All characteristics of profiled sheets are determined in GOST 24045–94.

Sheet length and width

There are full and useful length and width of corrugated board:

• full length and width is the distance between the edges of the sheet. Length can vary from 3000 to 12000 mm (multiple of 250 mm), width - from 800 to 1800 mm. At the request of the customer, the length of the sheet can be made less than 3000 mm and more than 12000 mm;
• the useful length and width of the sheet is the full size minus the overlap size. The length of the sheet is chosen so that it is equal to the length of the slope plus the size of the cornice overhang (200–400 mm). If shorter sheets are used, then the material will have to be laid with an overlap, which will reduce the level of waterproofing of the roof. Thus, when the full and useful length of the profiled sheet are the same, this is the best option. The overlap in width is usually one wave.

Sheet thickness and profile height

For roofing, corrugated board with a thickness of 0.55-1.0 mm is suitable. Thinner metal will warp when exposed to snow, wind or hail. It can also be accidentally damaged during installation.

Profile height can vary from 8 to 75 mm. If a wall sheet, which, for example, can be used for the construction of a fence, can have a profile height of 8 mm, then corrugated board with a value of this parameter of at least 20 mm is used for arranging the roof.

Roofing corrugated board has a wave height of 20 mm, and at the junction, a capillary groove is often made on it to remove moisture

Types of profile and its marking

There are the following types of corrugated board:

• wall. It is used for lining change houses, warehouses, car washes (indicated by the letter C);
• roofing (H or PC). Used to cover roofs;
• universal (SN). Suitable in both cases;
• carrier. It is used for the construction of structures operating under heavy loads, and, like the roofing material, has a large profile height. Therefore, roofing corrugated board with a large thickness of metal can be used as a carrier.

Next to the letter is usually put a number indicating the height of the profile. Examples of such a designation: S-18 (wall corrugated board with a wave height of 18 mm), H-75 (roofing material, wave height of 75 mm), NS-60 (carrier profiled sheet with a wave of 60 mm).

A brief marking of a corrugated sheet contains data on its type and wave height

However, there is also a more detailed marking, for example: H-57–750–0.8 AD ML-1202 / ML-1203, where:

• H - the purpose of the material (roofing);
• 57 - profile height;
• 750 - sheet width;
• 0.8 - its thickness;
• a further sequence of numbers and letters indicates the type of applied polymer coating. In this case, this is a double-sided spraying with different characteristics on each side. Sometimes, instead of data on the polymer coating, the length of the sheet is indicated.

Table: characteristics of some types of profiled sheet

When buying corrugated board, it should be borne in mind that the greater the height of the profile, the smaller the width of the sheet.

Despite the fact that different materials are used in the practice of roofing, experts advise choosing profiled sheets NS (N) -60, N-75, NS-35. They have special stiffening ribs and are most suitable for protecting the roof.

The profiled sheet can be simply galvanized or coated with a protective polymer coating. Polymer spraying makes the sheet more resistant to weather conditions and increases the durability of the roof.

Calculation of the size and number of corrugated sheets for roofing

Recall that the useful length of a profiled sheet sheet is optimally equal to its full length. Therefore, to calculate the required number of sheets, there is no need to calculate the roof area and divide it by the sheet area. This is done much easier: the width of the slope with a correction factor must be divided by the useful width of the metal profile sheet.

Calculate the number of sheets required for roofing for a conventional shed roof.

Shed roof allows you to most simply demonstrate the algorithm for calculating the number of sheets of corrugated board required for the roof

For example, let's take a roof with a roof slope width of 12 meters and calculate the required number of sheets of NS-35 corrugated board.

1. We multiply the width of the slope by a correction factor of 1.1. This is necessary to take into account overhangs, waste and the possibility of damage to the sheets during transportation and installation. We get 12 ∙ 1.1 = 13.2 m.
2. To determine the number of sheets, we divide the resulting value by the useful width of the sheet. Since the useful width of the NS-35 sheet is 1 meter, we divide 13.2 by 1 and get 13.2. The result is rounded up and we understand that for the arrangement of the roof we need 14 sheets.
3. We consider the amount of corrugated board in square meters. This is useful for determining the cost of roofing material. We multiply the number of sheets by the length of the sheet (for example, 6 meters) and by the full width of the sheet (for sheet NS-35 it is 1.25 meters). We get: 14 ∙ 6 ∙ 1.25 = 105 m 2.

For a gable roof, a similar calculation must be carried out for each slope. If the slopes are the same, then the resulting value for one of them should simply be multiplied by 2.

If two or more sheets are still laid along the length, the calculation is made somewhat differently:

1. We calculate the area of ​​the roof. The slope has the shape of a rectangle, so its area will be equal to the product of the sides: S \u003d 12 ∙ 6 \u003d 72 m 2 (the transverse size of the slope, together with the cornice overhang, is taken equal to 6 m).
2. We multiply the roof area by a correction factor of 1.1. We get S \u003d 72 ∙ 1.1 \u003d 79.2 m 2.
3. We divide the resulting value by the useful area of ​​\u200b\u200bthe sheet. Let's say that sheets with a length of 3.5 m are used. Then the useful length will be equal to 3.25 m (25 cm is set aside for a longitudinal overlap). We calculate the useful area as the product of this value by the useful width (1 m): S floor \u003d 3.25 ∙ 1 \u003d 3.25 m 2.
4. We calculate the number of sheets, for which we divide the total roof area by the usable sheet area: N \u003d S / S floor \u003d 79.2 / 3.25 \u003d 24.37. So, we need 25 sheets of corrugated board measuring 3.25 x 1.25 m.

You can also make a preliminary calculation of the roofing material using one of the online calculators, of which there are quite a few on the Internet.

Video: calculation of roofing materials using an online calculator

The relationship between the type of profiled sheet, the angle of inclination of the roof and the maximum step of the crate

The technical characteristics of different types of profile determine its use for roofs with certain angles of inclination and lathing pitch.

Table: influence of the profile type on the angle of inclination of the roof and the step of the batten

Profiled sheets marked "C" are cheaper than other brands. Therefore, they are often used for roofing. However, it is still better that in this case the angle of inclination of the roof be 45 o or more. With such a slope, the snow will melt quickly and water will not penetrate through the joints. In addition, when using sheet “C” for roofing, the sheathing must be made frequent or continuous.

roof sheet weight

The weight of the roof is one of the most important indicators that should be taken into account when arranging it. It determines the pressure exerted by the roof on the rafters and load-bearing walls. When making calculations, it is convenient to operate with the weight of one square meter of material. Then, knowing the total area, you can calculate the weight of the entire coverage.

To the greatest extent, the weight of the profiled sheet is determined by the following factors:

Calculation of the weight per square meter of a profile sheet

The weight of a profiled sheet with a polymer coating consists of the weight of metal, zinc and polymer.

To carry out the calculation, we need some initial data:

• steel density - 7.85 t / m 3;
• zinc density - 7.12 t/m 3 ;
• polymer density - 1.5 t/m 3 ;
• polymer coating thickness - 0.05 mm (pural).

Table: zinc coating thickness of a metal sheet depending on the class

The calculation is made according to the formula: M = t ∙ l ∙ h ∙ p, where t is the thickness of the material, l is the length, h is the width, p is the density.

For example, let's calculate the weight of a metal sheet with an area of ​​1 m 2 and a thickness of 0.8 mm with a Z-200 class galvanized coating and a pural polymer coating:

• the weight of a square meter of metal without a galvanized coating with a thickness is 0.8 ∙ 1 ∙ 1 ∙ 7.85 = 6.28 kg;
• the weight of the Z-200 class galvanized coating is 0.0297 ∙ 1 ∙ 1 ∙ 7.13 = 0.21 kg;
• the weight of the pural polymer coating is 0.05 ∙ 1 ∙ 1 ∙ 1.5 = 0.08 kg.

Adding up all the results, we get 6.57 kg.

In general, the weight of a square meter of a roofing profiled sheet is in the range of 5.4–12.4 kg, but most often it falls within the range of 6.0–8.0 kg.

Calculating the weight of a roofing profiled sheet using a table

The weight of the required brand of corrugated board can be quickly found in special reference tables.

Table: weight of a square and running meter of a profile sheet, depending on the brand

You can compare the weight per square meter of corrugated board with other roofing materials. It is almost one and a half times lighter than shingles and four times lighter than slate.

Decking is one of the lightest roofing materials - it is almost four times lighter than slate

The weight of the roofing cake coated with corrugated board

The approximate weight of 1 m 2 of the materials that make up the roofing cake is:

• profiled sheet - 6 kg;
• hydro and vapor barrier made of a polymer membrane - 1.5 kg;
• mineral wool insulation - 10 kg;
• crate of boards 2.5 cm thick - 15 kg.

Adding all the above data, we get 32.5 kg. We use a correction factor of 1.1 - the specific gravity of the roofing cake will be 35.75 kg. Of course, it may vary slightly depending on the weight of the components, but with a standard thickness, load-bearing walls and rafters can withstand loads up to 250 kg / m 2. Thus, with average weights of roofing materials, we have more than a sevenfold margin of safety.

Video: calculation of the number and weight of corrugated board in the Mastat information and analytical system

Strength characteristics of corrugated roofing

The roofing material must be durable, that is, withstand the load in certain operating conditions, without collapsing or deforming. Decking is much stronger than a flat sheet of metal of the same thickness. This happens due to the presence of a certain profile in this material. A profile with a higher height is able to withstand heavy loads. For example, for wall corrugated board C10-1200-0.6 with a support pitch of 1 meter, the allowable load is 86 kg / m 2, and for sheet HC44-1000-0.7 with a distance between supports of 3.5 meters - 182 kg / m 2. Professional sheet H75 makes it possible to make a gap between the supports already 5–7 meters and has no restrictions on snow load. Reducing the number of supports saves material for their arrangement and facilitates the truss system. However, sheets with a high profile height are made of thicker metal, so they are heavier.

Maximum allowable loads

There are 4 options for the construction of corrugated board supports: one-, two-, three- and four-span. The width of the support at the point of contact with the profiled sheet must be at least 40 mm.

When installing roofs, different schemes for fastening corrugated board with the number of support points from one to four can be used.

Table: strength characteristics of corrugated sheets of different brands

Calculation of the strength of the roofing and the choice of the grade of the profiled sheet

The total load on the profiled sheet consists of the pressure of snow and wind, as well as the weight of the deck itself.

For example, let's take the following data:

• gable roof;
• the angle of inclination is 35 about;
• the size of the slope projection on a horizontal surface is 6 m;
• the weight of a square meter of corrugated board is 7.4 kg (this is an indicator of sheet C21-1000-0.7). In terms of the load on the rafter system and load-bearing walls, as well as the price, it is quite suitable for us, but its strength remains to be seen;
• construction is underway in the Moscow region.

The specific snow load is determined by a special map issued by the hydrometeorological center. The entire territory of our country is divided into 8 snow regions. In each of them, the normative snow load is considered the same.

The snow load map allows you to determine the pressure of snow on the roof in various regions of Russia

Table: the value of standard snow loads by region

The construction site is located in the third snow region. The specific snow load here is 180 kg/m 2 . Taking into account the type of roof and the angle of inclination, the load is calculated according to the formula 180 ∙ (60 о - a) / a, where a is the angle of inclination of our roof. It turns out 180 ∙ 25/35 = 128.6 kg / m 2.

The specific wind load on the roof is determined in a similar way. For this, there is another map, which also divides the territory of Russia into 8 regions.

The snow load map allows you to determine the wind pressure on the roof in various regions of Russia

Table: the value of standard wind loads by region

In terms of wind load, the Moscow region is in the first wind region, where the standard value is 32 kg/m 2 . Taking into account the slope of the roof, the aerodynamic drag coefficient will be equal to 0.3. Thus, the wind load on the roof in question is 32 kg / m 2 ∙ 0.3 \u003d 9.6 kg / m 2.

We consider the total load on the roof. It is equal to the sum of the weight of the roofing cake materials, wind and snow loads: W \u003d 7.4 + 128.6 + 9.6 \u003d 145.6 kg / m 2. According to the table of strength characteristics given above, it can be seen that the C21-1000-0.6 profiled sheet with an ultimate load indicator of 195 kg / m 2 is quite suitable for the roof in question. However, we do not recommend using a profiled sheet with the minimum allowable characteristics, but to make a larger margin of safety, as there are situations when there is much more snow than usual, and winds have a force that is much higher than the standard values.

Video: calculation of snow and wind load on the roof

The method of calculating the number of sheets of corrugated board considered in the article allows you to economically use the material and reduce the cost of arranging the roof. The characteristics of various brands of profiled sheets make it possible to choose exactly what is needed specifically for your building. Calculating the weight of the roof and its strength will make your roof reliable and safe for many years.

Corrugated board is a practical, inexpensive yet durable and weather resistant roofing material that is currently considered to be the leader among roof coverings in the private, industrial as well as commercial civil engineering sector. For the construction of more than 60% of country and garden houses, corrugated board is used. The dimensions of the sheet make it easy to cover slopes of any shape, area and slope. It is the versatility that explains the high demand for profiled sheets. In this article, we will tell you what standards regulate quality, in what sizes it is produced, and also how to calculate how much material is required for installation.

Profiled sheeting is a roofing material made from high-quality galvanized steel sheet by cold pressing. In the production process, a smooth sheet is shaped by a powerful press into a wavy shape, the vertical walls of which are, in fact, additional stiffeners that increase the rigidity and mechanical strength of the material. To protect the metal from corrosion, a polymer coating or a special paint is applied to the corrugated board. In accordance with the performance and scope of this material is classified into the following categories:

• Wall. This class of profiled sheet is distinguished by a smaller thickness of the steel base, a lower profile wave height, and therefore a lower bearing capacity. It is mainly used for the construction of fences, fences, as well as wall cladding. For the construction of a roof, wall corrugated board can only be used as a temporary cover during installation work.
• Carrier. The load-bearing corrugated board is different in that it is made of thicker galvanized steel, and the wave height of this material sometimes exceeds 100 mm. It is used for the construction of hangars, garages, containers, as it has a high bearing capacity. This material can be used as a roofing material if it is necessary to cover a large area with a flat or shed roof.
• Universal (roofing). This type of profiled sheet has average characteristics, which are in the interval between wall and bearing material. Most often, it is the universal corrugated board that is used for the construction of the roof. Sufficient thickness and load-bearing capacity of the material, complete with low price, makes it one of the most practical roofing materials.

Important! The quality of a profiled sheet is determined by only 3 parameters: thickness, width and waveform of the surface that meets the standards. The requirements for this material are prescribed in GOST 24045-94, which regulates the standard dimensions and tolerances in the production of corrugated board. Manufacturers certify products voluntarily, but there is no doubt as a roofing material that has a certificate of conformity.

Standard sizes

The dimensions of the corrugated board are another advantage of this material, they allow you to select sheets that are optimally suited for roofing roofing. Different brands of profiled sheets are distinguished by 4 parameters - the thickness of the steel base, the width and length of the sheet, as well as the shape and height of the profile wave. The scope of use and the cost of the material depend on these criteria. For the construction of fences, sheets with a small thickness and length are used, which are conveniently placed between the supports. And for the construction of the roof, corrugated board with a wave height of at least 50-60 mm is used. Roofing material produced on the basis of profiled steel sheet has the following standard dimensions:

1. The length of the corrugated board depends on the scope of this material. Manufacturers use rolling mills that can produce sheets up to 14 m long. The profiled sheet used to cover the roof of residential buildings is usually cut into sheets of 6 m, since increasing the length beyond this indicator makes transportation unreasonably expensive.
2. The width of the profiled sheet is limited by the conditions of production. Coiled thin-sheet galvanized steel entering the press has a standard size of 1250 mm, and what will be the width of the material after exiting the conveyor depends on the shape and height of the wave. The width of the bearing corrugated board of the C75 brand is only 800 mm, and the same parameter of the C8 wall grade is 1200 mm, despite the fact that they are made from the same source material. That is, the width of the material depends on the shape and height of the profile.
3. The thickness of the profiled sheet used for roof decking is 0.45-1.2 mm. This indicator affects the strength, bearing capacity and durability of the material. In addition, the thicker the corrugated board, the more expensive it is.

Note! Roof decking differs from wall decking in the shape and height of the profile. The waves of this material are on average higher, which makes it possible to better drain the melt and rain water that accumulates on the slopes. In addition, it is often equipped with additional stiffeners that increase the strength and load-bearing capacity of the material.

Material calculation

When installing a roof, a situation often arises when there is not enough roofing material. In this case, you have to buy the missing one, as well as fork out for delivery because of some couple of sheets. This introduces nervousness into the process, forcing craftsmen to cut out and save on overlaps, which ultimately increases the cost of roofing work and reduces their quality. To avoid such a nuisance, you need to calculate how many sheets of corrugated board are required for roofing. Calculations are performed as follows:

Experienced craftsmen advise purchasing corrugated board with a small safety margin, it is 10-15% of the number of sheets. The more complicating elements (“cuckoos”, valleys, ribs) in the roof structure, the more margin is made.

Video instruction

Profiled sheet is one of the most common building materials used for roofing and finishing works, for the erection of fences and the construction of frame structures. These are corrugated sheets of galvanized metal, which may or may not have a polymer coating. Knowing the dimensions of the corrugated board for the fence, you can choose the best option for a particular type of work.

Profiled sheet - a versatile material with a wide range of colors

Different types of metal profiles differ in many parameters. The following dimensions are usually indicated: corrugation height, total sheet width, working width, metal sheet thickness.

Profiled sheet marking

All types of corrugated board are divided into 3 categories, depending on the purpose. They are denoted by different letters:

• C - wall profiled sheet, intended for all types of facing works, as well as for the construction of fences. Differs in affordable cost and reliability. The wave is raised by 4-44 millimeters.
• H-roofing profiled sheet. Able to withstand significant pressure loads. The height of the corrugation is more than 44 millimeters.
• HC is a universal profiled sheet that can be used for any work. The corrugation can have a rise of 35-44 millimeters.

It cannot be said that the profiled sheet for various purposes has standard sizes. Different brands of products differ in their dimensions and other characteristics. For example, the dimensions of the profiled sheet for the fence will be different from the dimensions of the roofing corrugated board.

As examples, we will analyze the most popular and affordable types of metal profiles, such as C8, C10, C20, C21, indicating their features and sizes.

Dimensions of corrugated board grade C8

C8 is considered one of the most economical options. It is widely used for the construction of temporary structures, fences, sheathing wall surfaces. Due to the low height of the corrugations, C8 can be used for filing suspended ceilings. Sheets do not take up space from the internal volume of the room. The light weight of the C8 sheet makes it possible to use light wooden frames for its installation. This reduces the cost of construction.

For roofing work, C8 profiled flooring is not recommended due to its insufficient rigidity.

C8 sheet dimensions:

• Overall width - 1.2 meters;
• useful (working) width - 115 cm;
• corrugation height - 8 mm;
• wave pitch between adjacent ribs - 115 mm.

Other types of wall corrugated board can be used for roofing, subject to certain conditions.

The size of the profiled sheet for the fence grade C10

This is a galvanized sheet with a small wave height, which allows you to create complex design and design solutions.

Scope of profile sheet C10:

• Finishing work on wall structures.
• Buildings are sheathed with C10 material inside, suspended ceilings are made.
• As temporary fencing at construction sites and other facilities.
• C10 sheets are used for construction.

If sheet C10 is used as a roof element, then it is necessary to ensure a significant angle of inclination of the roof. This is necessary in order to avoid possible weight loads in the form of snow, which could push through the metal profile.

C10 dimensions:

• Overall width - 1.16 meters;
• metal profile thickness - 0.4-0.8 mm;
• corrugation height - 10 mm;

Dimensions of profiled sheet brand C20

These are durable sheets of galvanized metal, in the section having the shape of a trapezoid or wave. It is used in various areas of construction:

• For roofing work. The step of the crate when using C20 should be no more than 40 cm.
• C20 is used for the manufacture of sandwich panels.
• Manufacturing of rigid structures. As a basis for mounting C20, a reinforced profile should be used.
• Sheathing of walls of buildings, garages, hangars, workshops and other buildings.
• Arrangement of partitions inside buildings.
• C20 is used for the manufacture of reliable fences.

Sheet dimensions C20:

• Overall width - 1.15 meters;
• useful (working) width - 110 cm;
• thickness of the metal profile - 0.45-0.7 mm;
• corrugation height - 18-20 mm;
• wave pitch between adjacent ribs - 137.5 mm.

Dimensions of profiled sheet C21

These are sheets of a trapezoidal profile. Standard sheet lengths are 6, 3 and 2 meters. Despite the fact that this profiled sheet belongs to the category of wall materials, its scope is much wider:

• Cladding of walls and facades of buildings.
• The construction of fences from C21 allows you to create durable and rigid structures.
• C21 allows you to build lightweight buildings using frameless technology.
• Installation of a roof with a sparse crate. C21 panels have a high corrugation, therefore they have an increased load-bearing capacity. It is used for any slopes of a roof.
• High-quality sandwich panels are made from C21 sheets.
• Sheathing of wooden structures, pavilions, garages, outbuildings.
• Beautiful and durable fences are being built from C21, including fences for industrial enterprises.

Sheet dimensions C21:

• Overall width - 1.051 meters;
• useful (working) width - 100 cm;
• metal profile thickness - 0.4-0.8 mm;
• corrugation height - 21 mm;
• wave pitch between adjacent ribs - 100 mm.

Whatever type of profiled sheet you choose for your needs, first find out their dimensions in order to make a structure with a minimum amount of waste. Purchase corrugated board with a margin of about 1 linear meter, as the sheets will overlap each other. You may need a margin of more than 1 meter if, for example, a long fence is being built.

Modern corrugated board is a universal building material that is in rather high demand. It is also used as a base for overlapping and strengthening building structures, as roofing, wall cladding and for many other tasks. A metal sheet bent into corrugation looks neat, has a simple and reliable profile, can be painted in almost any color and is brilliantly easy to install.

And, if you paid attention to this particular material, you need to choose the type that is suitable for the desired task. And for this it is important to know what sizes of corrugated sheets are needed, to what extent they are strong and with what height of the profile. And, depending on these three important parameters, corrugated board is divided into specific types and types, which we will now tell you about.

The largest range of technical metal sheets today is presented in the form of profiled and flat sheets.

We can say that this is one of the best materials for low-rise construction, which is great for roofing, as well as for building fences, creating ceilings and wall cladding:

As a basis for a modern profiled sheet, thin-sheet rolled products with an aluminum or zinc coating are used, and the manufacturing process takes place according to two different technologies - TU 14-11-247-88 (ac) and TU 14-11-236-88.

Advantages of corrugated board over other materials

Profiled floorings (profiled sheets, profiled sheets) are sheet corrugated profiles with corrugations of various shapes repeating along the width of the sheet. They are produced by cold bending of thin cold rolled sheet.

Such a coating is not without reason called a multifunctional building material. It's all about the availability of different types, which differ in terms of application, profile shape and metal thickness. The thickness of the metal in the profiled sheet varies from 0.35 to 0.9 mm, and the width - from 600 mm to 1150. In the factory, the height of the waves is made from 20 to 130 mm, as indicated by the special marking on the package. The length of the sheet is often the one preferred by a particular manufacturer or specially ordered by the buyer.

Such a roof is valued for such qualities:

• Ease. The weight of a square meter of corrugated board is from 3.9 kg to 24.1 kg. Thanks to this, it is possible to significantly reduce the volume of supporting structures, and there is no need for a serious support.
• Anti-corrosion protection and the possibility of a decorative coating. The best products from leading manufacturers have a service life of 45 years.
• The possibility of repeated use, which cannot be said about a soft roof.
• Large selection of fasteners and their colors.
• Machinability. The corrugated board is cut and drilled with conventional construction tools.

By the way, corrugated board is often compared with metal tiles as a material similar in manufacturing and operation process. The same base, the same cold press, only the look is different. In fact, there is a huge difference between them! It's all about the so-called "dead zones" of the metal, because of which it is difficult to cut. For example, if you do not pre-order the cutting of the coating in the factory for a specific project, then you cannot avoid a large overrun. In addition, it is quite difficult to join individual pieces of metal tiles together in order to achieve an even and tight seam, but with corrugated board everything is much simpler.

And finally, such a roofing has excellent mechanical strength and flexural rigidity along the corrugations. And this is not an empty phrase: such technological qualities make it possible to build safe and durable structures. Therefore, let's summarize and name the three main qualities of corrugated board: durability, fire safety and environmental friendliness.

And the townsfolk appreciate this material for private construction for the price, economy, simplicity and ease of installation. Let's see through the eyes of a practice: the sheets are light, comfortable, cut with ordinary metal scissors, they are easy to store and transport. Any home master will cope with the installation of corrugated board, you just need to read the useful tips on our website. In addition, in the process of repairing corrugated boarding, it is easy to replace its individual fragments and even use old ones - reuse for a new roof.

Here is an educational video on the subject:

Additional coating and corrosion protection

Modern corrugated board is produced by cold rolling from high-quality galvanized steel. Zinc is necessary here, because it protects well from the effects of the external environment, but in addition it needs to be protected with polymer coatings. Modern coatings provide not only an attractive appearance, but also significantly improve its mechanical performance, protect against weathering and give durability.

Basically, this is either galvanization, which remarkably protects against corrosion, or aluminum-galvanization, when the sheet is coated with a mixture of zinc and aluminum. This is a more economical coating option, but also less durable. The matter is that cheap aluminum reduces protective properties of a professional flooring. That is why such sheets are additionally covered with another decorative layer, for example, polyester.

And the most budgetary corrugated board, which is often found on the domestic market, is produced without a color coating at all. Not only does it look unpresentable, but the quality of the material is low. But to create an overlap for large areas, aesthetics are not needed, but low cost is a priority. Slightly different from this option is galvanizing with the addition of silicon, but still better.

Produce corrugated board with a special polymer coating. Indeed, without a coating, a galvanized sheet wears out quickly, and it constantly needs to be cleaned of dirt and rust. Therefore, for a roof, this is not an option, and it is better to give preference to profiles with an outer layer of pural and similar coatings.

The color of the coating itself is important not only as an aesthetic aspect, but also for designers. For example, an industrial building must be maintained in the chosen corporate style. And the color polymer coating also has the following types:

• Glossy polyester which looks great and protects well from corrosion. It is often used for corrugated exterior walls and facades. Polyester is enough to resist the occurrence of corrosion and not necessarily to be resistant to mechanical damage, of which there is little. Therefore, such profiled sheets are often ordered for industrial buildings, which usually have more than one floor. But if you choose corrugated board for finishing your own home, think about the fact that branches and other debris will be carried by the wind, and therefore scratches are more likely here and it is not worth saving.
• Pural– more expensive coverage. It is made on the basis of polyurethane and polyamide. Provides high reliability and excellent resistance to ultraviolet radiation and low temperatures. For roofing corrugated board it is better not to find.
• Plastisol- the most durable of all types of coating, 200 microns thick. It is based on polyvinyl chloride, and in the factory, relief embossing with a notch is applied to such a coating, for especially difficult climatic conditions.

Less common on corrugated board is a coating such as acrylic, PVC and PVDF, which also have their own advantages:

If we are talking about roofing, the thickness of the zinc coating and the method of its application are of decisive importance. If this is not enough, any scratches on the roof will lead to rapid corrosion. The type of rental is also important, which affects the durability of the future roof:

Rigidity requirements and corrugation shape

Modern corrugated board is sold with different sheet sizes and profiling shapes. It is not difficult to choose a corrugated board specifically for the roof, adopt a simple principle: the higher the corrugation, the stronger the roofing will be.

But, if you approach the matter with all responsibility, first calculate the loads of the future roof and only then see how the selected metal thickness and profiling height correspond to such parameters.

So, today corrugated board is produced with this form of corrugation:

1. Wavy, which has a cross section in the form of a sinusoid. The wavy form is the earliest, it appeared at the end of the 19th century. Such a corrugated roof has a particularly aesthetic appearance, which is so appreciated by designers. The waves themselves are sinusoids or more complex conjugated circles.
2. Trapezoidal, which provides the corrugated board with maximum rigidity and load-bearing capacity. This form of metal rolled sheet appeared in the 20s of the 20th century. The profile in the form of a trapezoid turned out to be more durable in practice, with a high bearing capacity and ease of installation. And until today it is the most popular form of corrugated board, which is produced with a corrugation height from 2 to 208 mm.
3. Cassette, with a section and a corrugation shape in the form of the letter "P", which is great for strengthening wall structures. Profiled sheets with this form appeared relatively recently and are intended specifically for use in wall structures.

See how visually these views differ:

The height of the corrugated board profile is also different: it is 12, 14, 18, 20, 30, 35 and even 65 mm. On the packaging of the corrugated board itself, the height of its profile is indicated. The main requirement for this parameter is that the sheets are rigid and high enough. And the higher the profile, the harder the corrugated board itself will be, which is the secret. But the low profile, up to 12 mm, is more often used already for outbuildings.

You will be interested to know that corrugated board has a certain relationship between the dimensions of the sheet, profile and corrugation height. For example, sheets with a height of 30-55 mm have a thickness of 0.25 to 0.5 mm, and sheets with a height of 12-20 mm have a thickness of 0.5 mm.

And, finally, corrugated board is also distinguished by the presence of grooves. For example, when you overlap sheets, and they have a capillary groove, it should be under the sheet - this is an additional element that will help remove moisture from the roof.

Types of corrugated board: wall, load-bearing or roofing

Modern corrugated board is in demand in construction and architecture, and is especially appreciated in prefabricated technologies. It is used not only for arranging roofs, but also for finishing walls, facades and much more, and such a profiled sheet is thinner than it is necessary specifically for roofing.

That is why it is so important to understand its types:

If we consider in more detail the scope of use of corrugated board, it is made for such areas:

1. Wall decking used for wall cladding and cladding of various fences. Usually the profiling height is not more than 20 mm.
2. Roof decking designed to cover the roof, from simple to complex shapes. The standard height of the corrugation is 20-45 millimeters.
3. Bearing corrugated board with a height of 45-160 mm is produced specifically for creating ceilings for warehouse and industrial facilities.

So that buyers do not get confused, wall corrugated board is designated with the letter “C”, roofing “CH” or a separate abbreviation bearing “H”, and there is also a separate type of corrugated board with a trapezoidal shape, which is indicated by the letter “T”.

The number that will stand next to the main letter means the height of the profile, although some manufacturers can additionally also indicate the thickness of the metal, the type of coating and their trademark:

Let's look at each type separately.

Wall decking: lightness and rigidity

Today, the letter "C" marks all profiles with a wavy and trapezoidal shape with a height of 8 to 44 mm. Such profiles are used for wall fencing, sandwich panels, partitions and fences. The main function of the C-profile is protective and decorative.

C8– wall decorative corrugated board. It has a profile height of 8 mm, which is considered the most suitable relief of the cladding, and all thanks to the short repeat period. And the rigidity of the sheet is achieved not by the shape of the profile, but by the small bending radius of the sheet and the increased slope of the side shelves. European counterparts - T6 and T8.

C10 already included in the list of profiled sheets, which are included in GOST 24045-94. For the manufacture of this type, not standard blanks with a width of 1000 and 1100 mm are used, but unusual ones, with a parameter of 1250 mm. Thanks to this, sheets are obtained with a thickness of 0.35 to 0.8 mm. It is C10 that is more often used for fences that imitate the texture of wood and other ideas of modern designers. Also C10- the main material for sandwich panels.

C13– thin sheet galvanized steel for the roof and walls. This corrugated board is actively used in fencing, cladding, prefabricated panels and structures. Moreover, the fence, due to increased rigidity, can already be built above 2.5 m. The working mounting width of such sheets is 1100 mm. And in this case, color polymer coloring on both sides is already allowed. European counterparts - C15, T14 and RAN-15.

C17- a more durable profiled sheet for the fence and roof, which is additionally used for the internal and external cladding of metal buildings and fencing areas from fire and lightning. This profiled sheet also differs from the previous options in the presence of a groove for water drainage, which accidentally seeps into the junction of adjacent sheets. Mounting width C17- 1090 mm. European analogues of profiled sheets C17, 18 and 20 – T18 and T20, RAN-20, MP20.

Such a roofing looks great on slopes of a simple form, but has some limitations: the minimum angle of inclination should be 14 degrees, with the exception of some types of corrugated board, where both 8 and 9 degrees are acceptable. And also there is a special corrugated board for almost flat roofs with a slope of 3-4 degrees.

C18- more or less high-quality corrugated board with small stiffeners. They eliminate the main drawback that metal roofing usually suffers from - the flapping of a flat sheet with every gust of wind. For the sake of this, this type of metal profile was endowed with excellent adhesion and tight sealing of narrow corrugations. There is also a groove for drainage of moisture. Mounting width - 1150 mm. Analog - Finnish profile RAN-19R and Orion.

Another view C18 - C18(wave). As you may have guessed, this profile has a wavy shape. This gives it a large bending radius and, at the same time, too little rigidity. Because of this, the maximum installation area does not exceed 1100 mm. Analogues: B18-1000, A18-1000, MP 18 and RAN-18R.

C20- a slightly stronger version than the previous one. Analogues: T20 and RAN-20.

C21- this is a wall profile that complies with GOST 24045-94. It has a regular, honeycomb-like trapezoidal structure. It gives the product versatility in use and quality in fit. Mounting width - up to 1000 mm.

HC35- this is one of the most popular metal profiles for walls, fences and roofs of outbuildings. The stiffeners here have a depth of 7 mm. Due to this, such a profiled sheet is suitable for arranging fixed formwork and covering with a crate up to 1.5 m.

HC44 and for coatings, and for walls, and for fences. It is made from a sheet with a width of 1400 mm and strength that corresponds to a profiled sheet. H114 with a width of 750 mm. Such a coating is laid at a crate step of up to 2.5 m.

Another option - NS44 TU, as an imitating analog NS44-1000, where for external similarity there are also stiffeners on wide and narrow shelves. But here the workpiece is smaller in width, due to which the profile periods are reduced from five to four, the angle of inclination at the side shelves is also reduced, and the dimensions are for wide and narrow ones.

C44 manufactured in accordance with GOST 24045-94. There are no additional stiffeners here, and the relief lines look neat and simple. The mounting width is 1000 mm, and such a profiled sheet is used for walls, roofing and wall cladding. You can lay such sheets on the crate in increments of 2 m.

Load-bearing wall profile: boundary values

A separate type of corrugated board - marked "NS". To some extent, it is too good for ordinary wall decoration and is rather weak in order to make floors out of them. But there are many areas where exactly these are needed: high solid fences, wall railings and even some roofs.

H750- bearing corrugated board. Due to the fact that it is included in GOST 24045-94, even inexperienced designers successfully use it. The only drawback of this type is the absence of the 1100 mm rolled blank required for it.

H900- a more durable sheet metal profile, which factories today produce according to their specifications. It is allowed to lay it on a crate step, which does not exceed 3 meters.

Bearing corrugated board: strength and thickness

For the construction of interfloor ceilings, profiled sheets with corrugations with a height of 57 mm or more are used. If the spans are more than 3 meters, then choose a corrugation from 57 to 75 mm, if more - then from 75 mm and a corrugated board thickness of 0.7-0.8 mm. Such corrugated board is produced with additional stiffeners for a higher bearing capacity.

Bearing corrugated board is used for intermediate floors, reinforcing fixed formwork, supporting structure and, of course, roofing. In addition, such sheets are also used as an element of the supporting structure of the frame of a house or building:

H60- bent sheet corrugated board for load-bearing structures for soft roofing, fixed formwork and metal roofing. As a basis, a galvanized sheet with a width of 1250 mm is taken, in which the rolled grade is not lower than 220. It is also installed on supports no wider than 3 m. GOST - 24045-94. Its analogue, made from a structural blank, is today used as a replacement for the H57-750, which is considered less reliable.

H75- the most popular corrugated board, which is actively used in steel structures for any climatic zones. It can even be laid on a crate, which is installed in increments of up to 4.5 m! And they make H75 from rolled steel grade 220-350 according to GOST 52246-2004.

H114- metal profile, which is used as a ceiling. With a width of 600 mm, H114 has the highest load-bearing capacity of any steel deck. It is made of steel with a thickness of 0.7-1.0 m and a width of 1250 mm. Also suitable for fixed formwork.

Its subspecies H114 750 with a workpiece width of 1400 mm, it significantly limits the possibilities of using such a corrugated board and increases the width of the overlap with one sheet, much more than H114-600. More at H114- the highest trapezoidal corrugation, the parameters of which are determined by the GOST 24045-94 standard. Due to this, such sheets are already laid with a support step of up to 6 m. H114 - RAN-113.

H153- this is a bearing profiled sheet of European quality, otherwise called "Europrofile". For him, the permissible step of the crate is up to 9 meters! That is why it is used both for roofing and for arranging interfloor ceilings, and when maximum load-bearing capacity is needed, but without a serious increase in the weight of the entire structure. Analogues: T150.1 and RAN-153 which is only available in white.

H158- the highest and most durable europrofile, which is produced in Russia. It is produced according to European standards. Analogue for H158 750 - T.160.1.

By the way, the bearing corrugated board has two subspecies: bearing and self-supporting. The carrier is needed in the construction of pools and in other private construction, and the self-supporting one is used at large industrial facilities.

In custody

Let's summarize: modern corrugated board is produced in different thicknesses, coatings and sheet widths. And for each of its tasks, its type and type is suitable. It is only important to purchase the product really with the parameters that were declared, and this is not always the case.

"Handicraft" corrugated board in practice may be thinner than necessary, and less protected from corrosion. Needless to say, what problems will this turn into in the future? Especially when it comes to covering.

The exact conditions under which the corrugated board is produced, and what kind of control takes place over its quality, determine the accuracy of the profile geometry, and the reliability of joining the previous assembly of sheets, and the future strength of their adhesion. Usually, large manufacturers are looking for good metal suppliers and issue a normal certificate for their products, which, by the way, you can demand from the seller.

Approach the issue of choosing corrugated board responsibly, and it will serve you for many years!