Decking 0 7 mm wt. Technical characteristics of the profiled sheet for roofing - dimensions, types and advantageous advantages of the material. Types of profiled sheet depending on the coverage

Profiled sheet is a thin-sheet material that is produced by cold-rolled method with extrusion of longitudinal waves on it. The latter can be in the form of a direct wave, crest or trapezoid. A huge advantage of a profiled sheet is its:
- fast and fairly simple production;
- ease of installation;
- Relatively light weight.

At the same time, profiled sheets, especially those that are of a high class, are rigid and do not sag under the weight, both their own and the maximum allowable for them. All this makes the profiled sheet a popular material for fences, installation of garages, other utility rooms, as well as for roofing. When choosing profiled sheets, its weight plays an important role.

Profiled sheet weight

The standard parameters of a profiled sheet are from 5 kilograms of weight for each square meter. However, this figure is more than arbitrary. The higher the quality of the profiled material, the higher, respectively, will be the weight of the sheets that are made from it.

It is important! The minimum weight of 1 square meter of profiled sheet is just over 4 kilograms, and the maximum is more than 21 kilograms. Sheets with the largest weight are most often universal, but are mainly used for fences.

The roofing profiled sheet has an average weight, although, at times, the use of thicker profiled sheets for sloping roofs is justified. The profiled carrier sheet has more weight.

The strongest is the profiled sheet, in which the weight of a running meter is equal (or close) to the weight of one square meter.

Indicators that affect the weight of profiled sheets

Each manufacturer indicates for which area the use of one or another profiled product will be justified. It is for the convenience of consumers that there are no standard sizes for these sheets.

In general, the indicators that affect the total weight of corrugated board are as follows:

• metal thickness
• layer of galvanized coating
• wave height

Attention! Modern manufacturers are increasingly mastering the methods of manufacturing light-alloy steel, the weight of which is quite light, and the quality is high. At the same time, such material can cost an order of magnitude more expensive than a similar profiled sheet made of thicker steel.

The entire profiled sheet has a certain marking, namely:

• C - wall
• H - carrier
• NS - universal

GOST necessarily contains the sheet width parameters, as well as the wave height. For example, HC35-1000 is a bearing wall profiled sheet with a wave height of up to 35 mm and a width of 1 meter. The weight of each square meter of such a sheet will be 6.4 kilograms to 8.4 kg.

Typically, the manufacturer indicates the weight of his product on the packaging. It also talks about the weight of not only a square, but also a running meter. The weight of the entire package may be indicated.

It is very important to know the weight of the profiled sheet before proceeding. The roof load must be calculated correctly, otherwise serious problems may arise in the future.

However, corrugated board is considered a relatively light material, so it is often used for laying on the roof. Read more about corrugated roofing. The article will help you to perform the correct installation.

Corrugated board weight table 1 m2

If the profiled sheet is made in accordance with GOST, then different manufacturers of the same brand will have the same parameters. The table below shows grades and weights.

Standard deviations are considered

• In length - up to 10 mm
• Wave width - 0.8 mm
• Wave height - 1.5 mm
• By weight - 20 - 100 grams

Weight value for the quality of profiled sheets

The weight of profiled sheets is indicated not only so that the builder knows how many kilograms he has to lift, but also to determine the moments of inertia and moments of resistance of the profiled sheet.

These geometric parameters are not customary to calculate, they are reference and are needed only in order to choose the right material, taking into account the tasks that will be assigned to it, as well as the climatic conditions under which the profiled sheet as part of the building structure will be operated.

The moment of inertia and the moment of resistance is calculated from the length of the axes. To achieve the specified result, both axes must be parallel to the planes of the upper and lower flanges of the profile. These parameters are also indicated in the extended sheet of each profiled sheet.

In general, when choosing a profiled sheet, it is necessary to take into account not only the marking (H, HC, C), but also its weight. For example, a difference in sheet thickness of 1 millimeter gives a difference in weight of more than 16 kilograms. Thus, the profiled sheet HC35-1000 has a thickness of 0.4 to 0.8 millimeters, and the minimum weight of each square meter does not even reach 4.5 kilograms. Whereas H153-840 has a maximum thickness of 1.5 mm and a weight of more than 21 kilograms.

Usually, the weight of 1 m2 of corrugated board is 5-7 kg. The lightness of the material is one of its main advantages.

In this article, we will talk about the main advantages that can be obtained due to low weight, as well as the main parameters of some grades of material. Decking is made from thin steel sheets that have passed the profiling stage - extruding longitudinal recesses using special rollers. To know how much a profiled sheet weighs, it is necessary to take into account the thickness of the metal that was used in production.

The profile can take various forms:

• trapezoid;
• wavy;
• rectangular.

The weight of a corrugated sheet is determined by the thickness of the steel base, the type of profile (corrugations) and the height of the protrusion of the profile above the main plane.

The corrugated board has high rigidity, and this allows you to mount it without the use of additional frames. At the same time, the sheet does not sag and retains its resistance to dynamic loads. And in view of the fact that the weight of corrugated board 1 m2 is relatively small, this can significantly reduce the load on the foundation and supporting structures.

Decking - sheet weight and related benefits

The advantages of a profile sheet include the following:

• the specific gravity of corrugated board is about 5-7 kg per 1 sq.m., while a similar area of ​​natural tiles weighs up to 42 kg;
• strength and long service life. Many manufacturers give a guarantee for their products for a period of 10 years;
• since the corrugated board weighs 1 m2, it is possible to achieve resource savings by lightening the supporting frame;
• the appearance of corrugated board allows you to achieve unprecedented beauty of the created structure, and due to the wide range of color solutions and profile shapes on the market, you can realize the most daring design solutions;
• the low weight of galvanized corrugated board and the correct calculation can significantly speed up the installation procedure. In addition, to work with a metal profile, you can do without the involvement of special equipment for lifting large loads.

As can be understood from the above, the high popularity of the material is due to its excellent specific gravity, as well as performance. The weight of the painted corrugated board makes it easy to carry out restoration and repair work.

So, for example, when reconstructing an old roof, you can use the C8 metal profile, which, in comparison with asbestos cement, significantly reduces financial and labor costs for replacing and strengthening the truss structure. And if you take into account the low cost of the material, then corrugated board often becomes the only alternative option for installing and repairing the roof.

As mentioned above, the weight characteristic of the metal profile depends primarily on the thickness of the steel base. So, for example, with a steel thickness of 0.5 mm, the weight of a square meter of corrugated board will be about 3.8 kg. At the same time, with a 2-fold increase in the sheet thickness, its weight can be 17 kg (this is due to an increase in the total surface area due to the shape of the profile and the reinforcement of the material with stiffening frames). In addition, it also depends on the wave profile and its height. Modern methods of production of metal profiles make it possible to achieve a reduction in the weight of the sheet without loss in strength and reliability.

How to choose the right corrugated board, in detail on the video:

Characteristics of different brands of corrugated board

For clarity, consider some of the most common brands of corrugated board:

1. H60 possesses the increased indicators of rigidity and durability. This roofing corrugated board is used when covering fences, walls of non-residential premises, barriers, as well as when carrying out roofing work. Often this brand is used as fixed formwork. There are stiffening ribs along the main part of the sheet, which allow the sheet to cope with high dynamic and static loads. H60 is also used in the construction of industrial facilities. To protect against the action of aggressive atmospheric factors, H60 corrugated board is coated with galvanization and a polymer layer. Polymer coatings are designed to protect steel from temperature extremes, moisture and accidental mechanical damage. With a sheet thickness of 0.7 mm and a width of 1.25 m, one square meter of corrugated board has a weight of 8.8 kg, with a thickness of 0.8 mm - 9.9 kg, with a thickness of 0.9 mm - 11.1 kg.
   

   
   

2. Profiled H75 used for roofing work. The material is characterized by high strength and rigidity, and due to the special shape of the profile, the sheets can withstand severe loads over a long period of time. This brand of corrugated board is used for the construction of horizontal and vertical planes that will be subjected to constant loads (i.e. formwork, intermediate floors, etc.). Due to galvanization and the presence of a polymer coating, H75 corrugated board is practically not affected by such negative factors as snow, rain and chemicals. This professional sheet perfectly resists long-term static loads. However, it does not deform. Due to the long service life, H75 corrugated board is also used for the construction of large industrial facilities. How much does a sheet of corrugated board weigh? With a thickness of 0.7 mm and a sheet width of 1.25 m, a square meter of material weighs 9.8 kg. With a thickness of 0.8 mm - 11.2 kg, and with a thickness of 0.9 mm - 12.5 kg.
3. Profiled C21 also made from galvanized steel sheets (read: ""). In order to give the entire area of ​​the sheets greater rigidity, they undergo trapezoidal molding. This material is used for various works. But the main area of ​​\u200b\u200buse of the C21 brand is the construction of fences and various partitions (more details: ""). The corrugated board has high rigidity, which helps prevent sagging of the structure. In view of this, there is no need to install additional elements in the frame of the structure. Due to the lower mass of the material, handling is greatly simplified. So, with a sheet thickness of 0.55 mm and a standard width of 1.25 m, a square meter of material weighs only 5.9 kg, with a base thickness of 0.7 mm - 7.4 kg.
   

   
   

4. Profiled C8 has a trapezoidal profile. The height of the corrugation is only 8 mm, which is why this brand is called a "flat" metal profile. This material has found wide application in the construction of partitions and walls, fences and various lightweight structures. C8 corrugated board is one of the best types of material for erecting a fence around a private area. At the same time, C8 corrugated board is not used as a roofing material and load-bearing structures. An exception is the carrying out of repair work and the use of corrugated board as a temporary cover for bare sections of the truss system. Decking sheet weight - 4.92 kg with a base thickness of 0.55 mm and 6.17 kg with a thickness of 0.7 mm.
   

   
   

5. Profiled C10 and C10-1100 are made from sheet metal grade 01. The profile height of such a profiled sheet is only 10 mm, and the standard width is 1180 mm. With a thickness of 0.4 mm, a sheet of corrugated board has a weight of 3.63 kg per 1 square meter. With an increase in thickness to 0.5 mm, the weight increases to 4.46 kg.
6. Decking brand HC35 are made of galvanized steel or sheet metal grade 01. The total width of the sheets is 1060 mm. How much does corrugated board weigh: with a base thickness of 0.4 mm, a square meter of corrugated board has a weight of 4.19 kg, with an increase in thickness to 0.8 mm, the weight increases to 7.9 kg.

A wide selection of shades and profile shapes allows you to implement almost any architectural and design solutions.

When erecting various buildings and structures, it is very important to take into account the mass of building materials, especially when constructing a roof, because, in addition to its own weight, it must perceive loads from wind, snow and water during rain. If the roof covering is made of profiled steel, then you need to know the weight of the profiled sheet. In addition, it is necessary to understand what factors this value depends on, and why it is needed.

The weight of a profiled sheet depends on several factors:

• features of steel alloy;
• material thickness;
• profile configuration;
• sheet dimensions.

The following factors affect the weight of the product:

1. The weight characteristic of a profiled sheet largely depends on the characteristics and composition of the raw materials used for its manufacture. The production technology of this material is constantly being improved, the composition of the alloy is improving, which makes it possible to obtain a lighter product without losing its technical characteristics.
2. Another condition that affects the mass of the product is its thickness. The greater the thickness, the greater the mass of one sheet. This sheet material is produced in accordance with GOST number 24045-94, according to which profile sheets are made with a thickness of 0.06-0.1 cm. However, some manufacturers produce products with a thickness of 0.045-1.018 cm.
3. Also, the weight of a corrugated sheet depends on the height and pitch of the ridge. If two products of the same dimensions and steel thickness have different characteristics of the height and pitch of the ridge, then the weight of these elements will be different. This is because with a higher profile per unit area there is a greater amount of sheet steel, and consequently, the weight of the product increases.
4. Also, the mass of the material depends on the configuration of the wave. The profile can be of the usual wavy shape, made in a trapezoid or rectangular. So, a sheet with a wavy corrugation will have less mass than a product with a trapezoidal profile configuration.
5. The mass of corrugated board depends on the width of the product. Moreover, it should be borne in mind that this value is indicated in two versions: full and working. The last of them is given taking into account the overlap of the sheets. According to GOST, sheets are made with a width of 64.6 cm to 106.0 cm. The manufacturer himself made sure that the wide sheets were not very heavy, therefore, the wider the sheet, the lower the wave height.

The need to determine the mass of material

The mass of the profiled product is especially important to know if you are going to cover the roof with this material. Knowing how much corrugated board weighs is necessary in order to calculate the load from the roof on the foundation, the supporting structures of the building. To perform the necessary calculations and determine the desired values, you need to know exactly how much the profiled sheet weighs.

When choosing a roof covering, very often the choice is made in favor of a profiled product, since it is quite strong, durable and light in weight. One m2 of corrugated board (even of the largest thickness) gives a minimum load on the roof and other structures of the building. Due to the high rigidity of the metal profile, the coating will not sag and deform under snow and wind loads. Due to the low weight, the load on the truss system is reduced.

Sheet dimensions and weight

The highest quality corrugated board is manufactured in accordance with GOST number 24045-94. This regulatory document regulates the main dimensions of the metal profile and its mass. Each type of profiled products has its own marking. The first letter in the designation indicates the scope of the material, for example, C - wall, H - load-bearing, HC - universal. The letter designation is followed by a number that indicates the height of the profile corrugation.

The specific gravity of the corrugated board can be found in the table below:

As can be seen from the table above, C8 corrugated board, whose weight is minimal, is the lightest among profiled sheets. In general, the weight of 1 m2 of a metal profile is not so big when compared with other roofing:

• the weight of 1m2 of cement-sand piece tiles is 25 kg;
• the mass of a square meter of roofing slate is 12 kg;
• the required amount of natural tiles to cover one square of the roof weighs 50 kg;
• if we compare slate roofing and corrugated board, the weight of the first coating is much larger and amounts to 52 kg.

That is why, if the question arises, which light roofing material to choose so as not to unnecessarily load the truss system and the supporting structures of the building, the choice falls on the metal profile.

As you can see, among all the advantages that corrugated board has, weight and rigidity can be called the main ones. However, when choosing a roofing corrugated board, it is not necessary to give preference to a sheet with the greatest thickness. It is necessary to strike a balance of the necessary rigidity and sufficient lightness. For household and one-story structures, you can choose a product with a thickness in the range of 0.05-0.06 cm. The roof of a two-story private house can be covered with a metal profile 0.07-0.08 cm thick.

The corrugated board is a light roofing, as 1 m2 of a sheet weighs about 5 kg on average. This positive characteristic made the durable material popular. The exact weight of the profiled sheet for each brand is determined individually. Let's figure out what this indicator depends on, and make an overview of popular brands of this material.

Influencing factors

Many determine the weight of a corrugated sheet by its size. This is not entirely true, since 2 products of the same dimensions, but of different brands, have different weights. This value is determined by the thickness of the material, the shape and size of the wave, as well as the mass of the steel alloy from which it is made.

Most often it is made of galvanized metal, but alloys can be used. Each raw material has its own weight and plays one of the main roles in shaping the mass of the finished product. Modern technologies make it possible to use alloys of different metals in the production of profiled sheets. Due to this, the manufacturer tries to reduce the cost of the material, but not to the detriment of its strength.

Another important factor is the thickness. There is a standard GOST 24045-94, according to which manufacturers manufacture products of 0.6–1 mm. Sometimes in retail outlets there are products of 0.45–1.18 mm.

Products of any brand has a wave. The higher its height, the heavier the product will be. So why is the weight of a square meter of corrugated board of the same thickness, but with different wave heights so different? It all depends on the amount of metal falling on 1 m2 of the product. More steel or alloy is used to make a high wave than a low profile, and therefore the overall result will vary.

In addition to height, the wave differs in its shape. The profile of a professional flooring is made rectangular, a trapeze or a traditional wave. If we take, for example, an instance with a profile in the form of a trapezoid, then its weight of 1 m2 will exceed the mass of a similarly sized wavy product.

And the last factor that needs attention is the width. There are two concepts such as working area and full. These two definitions differ in the width of the overlap. A product manufactured in accordance with GOST has a full width range of 646–1060 mm. The width is affected by the same indicator of wave height. The higher the wave, the narrower the product, but the weight of 1m2 is greater.

Overview of popular brands

To find out how much a profiled sheet weighs, let's look at several popular brands often used in the construction of roofs and fences.

Brand C21

C21 profiled sheet is made from galvanized sheet metal. Rigidity is given by waves made in the form of a trapezoid. Most often, this brand is used in the construction of fences and partitions. The increased rigidity of the profile does not allow bending, which reduces the consumption of material for the additional manufacture of frame fasteners. You can find out the weight of the profiled sheet c21 with different thicknesses of metal from the table. For example, the mass of 1 p / m with a thickness of 0.6 and a width of 1250 is 6.4 kg. If we take the weight of 1 m2 of a product with the same parameters, then it will also be equal to 6.4 kg.

Brand H114

Let's determine the weight of the H114 corrugated board, which is often used for the construction of roofs. It is used in regions where bad climatic conditions prevail. The material is able to withstand heavy snow load, strong gusts of wind. The large weight of H114 corrugated board determines its high strength, which allows it to be used in the construction of non-separable formwork for monolithic structures. We will calculate the mass of corrugated board n114 according to the thickness of the steel, which has a range of 0.7–1.2 mm. If you look at the table, you can see that the sheets of this brand are much heavier, for example, compared to the c21 brand.

Take, for example, a sheet with a thickness of 0.7. According to the table, the weight of corrugated board n114–750 is 8.3 kg / 1 p / m. Now let's find out the severity of 1 m2 of the product. We return to the same table, where we see that the mass of corrugated board n114 with a size of 1 m2 exceeds 1 p / m and is equal to 11.10 kg. If you take it from steel with a thickness of 1, then its mass will be even more impressive. For example, the weight of corrugated board n114–750–1.0 is 15.6 kg/m2.

The H114 brand is produced with a working area of ​​600 and 750 mm. Strength is provided by trapezoidal profile shapes. Due to the smaller dimensions, less load falls on a 600 mm wide sheet, so the upper crossbar of the wave consists of 1 stiffening rib.

Brand C8

The appearance of the waves of the profiled sheet c8 resemble the shape of a trapezoid. The profile has a height of 8 mm. The table below indicates the weight of c8 corrugated board, depending on its thickness. Take, for example, profiled sheet s8-1150 with a thickness of 0.4. From the table you can see that 1 m / p - 4.45 kg, and 1 m2 - 3.87 kg.

The profiled sheet c8 is used in the construction of light structures. These can be partitions, fences of private plots and other fragile structures. The use of profiled sheet c8 as a roofing is unjustified. It is durable, but not strong enough to withstand heavy snow loads. The professional sheet c8 gained popularity among summer residents due to its low cost without compromising good performance.

Brand H75

H75 corrugated board is used as a roofing. The increased strength profile is able to withstand heavy loads, both in a vertical and horizontal position. Produce professional flooring H75 from galvanized sheet steel. The products are produced in different sizes. If we take, for example, a product with a thickness of 0.7 mm and a width of 1250, then 1 m2 will equal 9.8 kg. The mass of 1 m2 with a thickness of 0.9 will already be 12.5 kg. For the convenience of determining the weight of the H75 brand product, tables are similarly used.

Brand NS35

NS 35 corrugated board is made from galvanized sheet metal or galvanized metal with a protective polymer layer. The material is used to cover roofs with a slight slope, in the construction of prefabricated buildings, fences and other structures. Trapezoidal waveforms give the material increased strength, with a relatively small mass. If we take from the table the material of the largest thickness of 0.8 mm, then 1 m2 is equal to 8.4 kg. The thinnest professional sheet - 0.4 only 4.45 kg / m2.

From the examples considered, we can conclude that, with its high strength, the profiled sheet has a low weight, and it is necessary to know it in order to correctly perform the calculations of the roof truss system.

One of the multi-purpose and widely used modern building materials is corrugated board.

Since the material has a relief surface, which makes it the owner of exceptional longitudinal and transverse rigidity, it is used almost everywhere.

Its other qualities are also captivating: strength, ductility and corrosion resistance.

What is corrugated board made from?

For the manufacture of corrugated board, the same material is used as for the metal tile - a steel sheet.

It's just that this sheet is rolled by cold rolling through other machines and the appearance of the corrugated board is different.

If the metal tile is an imitation of ceramic tiles, then the corrugated board imitates slate.

Then a layer of zinc is applied to the surface of the sheet to protect it from corrosion and a layer of polymer anti-corrosion coating.

Depending on the purpose of operation, corrugated board is usually divided into several types:

1. Mark "N". In its marking, the presence of the letter H indicates that it is a "bearing" material. The thickness of the steel sheet is the largest possible. The wave height is also maximum.

   In order to make this material even more rigid, additional grooves are made on its surface. Grade H has proven itself well in the manufacture of heavy cargo containers, as well as in the construction of hangars, garages, warehouses, workshops, fences, and other facilities and structures.

   It is this corrugated board that is most often used for the outer cladding of the walls of buildings, the manufacture of gates, fences. Sometimes such a corrugated board is used in roofing work.

   But this happens very rarely, since such material weighs a lot.

2. Professional flooring "NS". That is, a load-bearing wall material. Such material is the most versatile of the types of corrugated board. The thickness of such a profiled sheet is averaged.

   It also has a wave surface of medium height. The profiled material of the brand "NS" is distinguished by increased rigidity, and can be used for finishing ceilings, walls, ceilings of any kind, as a roofing material.

3. Mark "C". Already by marking it is clear that this is a wall corrugated board. And for wall decoration, it is these profiled sheets that are most often used. The small thickness of the product greatly simplifies installation.

   As a rule, such corrugated board is used in conjunction with various heaters: polystyrene foam, ecowool, mineral wool or natural heaters.

   Produced profiled sheet brand "C" medium and small thickness. The height of the corrugation is average, which makes this material very convenient for roofing.

   A roof made of this material is durable and reliable. It easily withstands any load under any impact.

   Such a bearing element is often used as flooring on scaffolding: such material can easily withstand a large weight load.

General characteristics

The thickness of the sheets is from 0.4 mm for wall corrugated board to 1.5 mm for bearing corrugated board.

The presence of additional stiffeners, as well as grooves, make this material very resistant to various aggressive environments and any kind of load.

But this material, despite its high mechanical strength, is one of the lightest building materials.

The professional flooring of the H brand is used in construction everywhere.

It is also often used in restoration and repair work.

If corrugated board is used for finishing roofing, then this is a material of grade H or HC.

It is able to easily support the weight of a person (which is very important during installation) or any thickness of snow cover.

Load, mechanical or chemical influence, has practically no effect on profiled sheets.

The presence of a galvanized coating and a polymer film make steel sheets not susceptible to moisture, sudden changes in temperature, and corrosion.

It is possible to transport and mount a professional flooring at any weather.

Installation of corrugated board does not require complex construction tools and special equipment.

Material weight

The weight of a steel profiled sheet depends on its thickness, the thickness of the zinc and polymer coatings.

After all, each material has its own weight.

Self-tapping screws for fastening

The fastening of the profiled steel sheet to the elements of the crate is carried out using self-tapping screws.

Or, as the builders say, self-tapping screws.

A self-tapping screw is a type of fastener, which is a steel rod with a head and a triangular external thread.

In the process of fastening, such a screw independently cuts a thread inside the hole.

This type of fastener differs from screws and screws in that the thread is applied to the entire cylindrical surface of the rod.

To date, the range of self-tapping screws for fastening the profiled sheet is very wide.

And you should know that for each type of work there is a separate type of self-tapping screws, which differ in their parameters and characteristics.

That is, on the roof and a self-tapping screw for mounting on the fence - these are different fasteners.

And if you get the wrong fasteners, it is difficult to guarantee the strength and reliability of fastening the sheets.

Self-tapping screws are made of high quality stainless or galvanized carbon steel.

The self-tapping kit also includes a gasket made of neoprene.

The presence of such a gasket allows you to make the attachment point airtight.

Most manufacturers of fasteners, in order for the design of the fence or roof to have a more presentable appearance, cover the head of the self-tapping screw with polymer paint.

The paint used is the same as when painting sheets.

Therefore, after installation, the self-tapping screw is almost invisible.

Types of self-tapping screws for fastening

In total, there are three types of self-tapping screws for fastening a profiled sheet:

1. For fastening products to wooden frames. For such a self-tapping screw, the thread pitch is rare, which makes it possible to ensure the strength of the fastener. Such a self-tapping screw can be screwed without problems even into the hardest wood.
2. For fastening the product to metal. Also, such a self-tapping screw is used if it is necessary to attach a profiled sheet to a structure that is affected by strong wind loads. The thread pitch on such a self-tapping screw is also rare. But in the manufacture of a drilling tip, a special sharpening is made, which, during the work, eliminates the violation of the structure of the material.
3. For fixing additional and ridge elements on the roof. These screws are very long.

All three types of self-tapping screws are equipped with a special drill tip, thanks to which it is not necessary to pre-drill a hole in the fastened elements.

And the hex head is easily fixed in the screwdriver's chuck, which greatly simplifies the work process.

Weight and cost of screws

The weight of self-tapping screws and their cost depend on their diameter and length.

A measure of the weight of a self-tapping screw is a kilogram per 1000 fasteners.

Depending on the length of the product, the weight of one thousand self-tapping screws can range from 18.5 to 41.67 kg. That is, one self-tapping screw can weigh from 18.5 to 41.67 grams.

When fixing the corrugated board on the roof, 9 self-tapping screws are consumed per sheet.

To fix the sheet on the fence, 6 self-tapping screws are enough.

Since the sheets are overlapped, some self-tapping screws hold 2 sheets at the same time.

Prices for self-tapping screws also depend on the size, and are in the range of 1.6 - 3.0 rubles per unit.

Do-it-yourself video about a roof made of corrugated board.