Contents
We often hear and see what roofs, sheds, fences are made of profiled sheet. What kind of material is it that has such a wide range of applications. What are its arches and types, what sizes. And how do the dimensions of the profiled sheet affect its application.
What is a professional sheet
A profiled sheet is a building sheet material that is made from thin sheet steel. A relief is formed on the workpiece by cold stamping, and then a protective coating is applied. The relief is called a profile. Hence the name of the material – profiled sheet. That is, a sheet with a profile. You can also find such a name as corrugated board. Some people think that corrugated board and corrugated board are different materials and there is a difference between them. And here it is not. No difference. It’s just that in GOST two brands are described as “for flooring”. Hence, apparently, the name corrugated board came from.
“Bent steel sheet profiles with trapezoidal corrugations for construction” – the name according to GOST 24045-2016. Conventionally, we can say that if necessary, we choose roofing profiles (corrugated board) to cover the roof, and if necessary, sheathe the walls – wall profiles (profiled sheet).
In general, this material has a lot of names. You can meet the “sheet profile”, metal profile. The “profile sheet” is less common. There is also a name from the catalogs – profiled steel sheet. It’s all about the same stuff.
So, a profiled sheet is a steel sheet with a formed relief. A protective multi-layer coating is applied to it. The number of layers and types of coatings differ and affect the final characteristics of the product. For durability, resistance to fading, to high or low temperatures, to chemical and mechanical stress. In general, many important properties depend on the coating and the quality of its application.
The profiled sheet is different in purpose and it differs in relief. In the sense that the height and width of the wave differ, the distance between the peaks, and the shape is always a trapezoid. This is spelled out in GOST 24045-94. Only in some types (with increased bearing capacity) ledges – shelves are added on the side faces, and additional grooves are formed in the crest and recess. However, the profile shape is a trapezoid.
Grades of corrugated board
Typically, corrugated board is made of sheet steel with zinc and aluminum-zinc coating. If an aluminum-zinc coating is used, AC is put in the marking, if zinc is used, nothing is put. If zinc is applied electrolytically, then EOCP is installed. Also, the sheet can be coated with a layer of aluminum (letters AL in the marking) or aluminosilicon (AK). These coatings provide better protection, but they are expensive.
In addition to various “primary” coatings, steel sheets are used in various thicknesses. In combination with a different profile, it has a different bearing capacity, respectively, it has a different purpose and scope. By purpose, profiles are divided into types (GOST 24045-2016):
- H – for load-bearing flooring of coatings that perceive the weight of the roof with insulation and the load of climatic influences;
- NS – for flooring and wall protections;
- C – for wall fences that perform load-bearing and enclosing functions.
Sometimes there is such a decoding of the designations of the corrugated board, where the type H is the bearing one (for the bearing flooring of the coatings that perceive the weight of the roof with insulation and the load of climatic influences). He is the heaviest, the toughest. Roofs are made from this corrugated board under high snow and wind loads.
NS – bearing wall. Another name is universal. Less “hardy”, but can be used on the roof with low loads on it. It is also possible to build load-bearing walls from it (with sufficient thickness and depth of relief). He is often “let” on fences that do not have crossbars between the posts.
C – wall profiled sheet. Used for sheathing frame walls. It is used in the construction of garages from corrugated board, utility rooms. The same type, but of sufficient thickness, can be attached to the fence if there are crossbars between the posts. For roofing, this material is not recommended. Unless there is almost no snow and wind. And then, the crate should be frequent, with small gaps.
Profiled sheet marking and its decoding
Profiled sheet marking is also described in GOST. It contains all the necessary data, except for weight. And so, there are all sizes of the profiled sheet, the name of the protective coating on both sides. But in order to read the transcript, you need to know at what position which characters, what they display. The appearance of the marking of the profiled sheet in the figure.
The first position is the sheet type. It is spelled out in the previous paragraph: C – wall, HC – universal, H – for flooring. The specific area of application is not indicated, but this information is usually given by manufacturers.
Profiled sheet dimensions and material
The second position will also not cause many questions. Here are the dimensions of the profiled sheet in millimeters. Only the order of magnitude is unusual. The height is given first. This refers to the height of the profile. Then comes the width and thickness of the sheet of metal. The length is not specified, it is usually discussed upon delivery, as it can vary widely. For example, H44-1000-0,8. This is a carrier profile with a wave height of 44 mm, a sheet width of 1000 mm, made of a metal sheet with a thickness of 0,8 mm.
In the third position are the letters by which you can determine the material of the workpiece. That is, what primary protective coating was applied to the metal sheet:
- If the steel is galvanized, it costs nothing.
- Electrolytic galvanization – EOCP.
- Aluzinc coating – AC.
- Aluminum coating – AL.
- Alumino-ceramic – AK.
For example, H57-750-0,8 AL. Everything is clear with the dimensions of the corrugated board: sheet height 57 mm, width 750 mm, steel thickness 0,8 mm. The letters AL denote aluminum coating. This is probably understandable too.
Paintwork
The fourth and fifth positions reflect the type of applied paintwork. All types of paints and primers that GOST permits are shown in the table. It also displays the resistance to chemical attack, depending on the type of primary protective coating on the metal.
| Name and designation of paint | Primer designation | Coating thickness in µm | Resistance to aggressive environments when applied to zinc coating | Resistant to aggressive environments when applied to aluzinc coating | Resistance to aggressive environments when applied to aluminum coating |
|---|---|---|---|---|---|
| Without cover | non-aggressive | slightly aggressive with restrictions | slightly aggressive with restrictions | ||
| Enamel GF-2017 | 10-12 m | non-aggressive | slightly aggressive with restrictions | slightly aggressive with restrictions | |
| Polyethersilicone enamels ML-1202 | EP-0200 | 25-34 m | weakly aggressive | weakly aggressive | weakly aggressive |
| Acrylic silicone enamel AS-1171, AS-5122 | EP-0200 | 25-30 m | weakly aggressive | weakly aggressive | weakly aggressive |
| Organic paints OD-KhV-221 | AK-0138 | 40-50 m | weakly aggressive | weakly aggressive | weakly aggressive |
| Epoxy primer EP-0140 | 70-80 m | weakly aggressive | weakly aggressive | weakly aggressive | |
| PVC compounds PL_HV-122 | AK-0138 | 180-220 m | weakly aggressive | non-aggressive with restrictions | non-aggressive with restrictions |
But the standard was developed a long time ago, and GOSTs are rarely updated. During this time, more reliable polymer coatings than paints appeared. Roughly speaking, a profiled sheet with a polymer coating does not apply to standard ones. But sheets with a polymer coating are more resistant to fading, better tolerate weather, ultraviolet, more resistant to mechanical stress. So don’t say they are bad. Expensive. Yes. But performance is better.
Here are some more coverages:
- Pural. Referred to as PUR. High resistance to mechanical stress, abrasion.
- PVDF. Polyvinylidene fluoride. High resistance to ultraviolet. Good for roofs.
- PVC (or PVC). Polyvinyl chloride. High degree of protection against corrosion. Good in regions close to the sea.
- AC. Acrylic. The most inexpensive of polymer coatings. In relation to the above, it is inferior in terms of resistance to fading and the degree of protection.
In general, the very marking of the profiled sheet and what it hides was considered. The most interesting thing is that usually only the first two positions are indicated. For example, C 18-100-0,9, HC 44-100-0,6. The rest must either look in the description, or learn from sellers and dealers.
Profiled sheet dimensions and weight
In general, enterprises produce profiled sheets not only according to GOST, but also according to TU. Technical specifications are technical conditions in which the manufacturer puts down his dimensions and quality requirements. It’s not that hard to register them. But this is not GOST and anything can be there. If you see specifications in the marking or in the accompanying documents, it is better to read it so that there are no surprises. And in the standard there are not so many profiles and sizes of the profiled sheet, which is why TU is used. Users require other sizes and profiles. The table shows the grades and dimensions of the profiled sheet according to GOST, and the drawings and appearance are added to the figure. By the way, sheet thickness with * is not a standard.
| Profiled sheet designation | Width | Thickness of metal, mm | Weight 1 meter long, kg | Weight per square meter, kg |
|---|---|---|---|---|
| H-75-750-0,7 | 750 | 0,7 | 7,4 | 9,8 |
| H75-750-0,8 | 750 | 0,8 | 8,4 | 11,2 |
| H75-750-0,9 | 750 | 0,9 | 9,3 | 12,5 |
| H114-600-0,8 | 600 | 0,8 | 8,4 | 14,0 |
| H114-600-0,9 | 600 | 0,9 | 9,3 | 15,6 |
| H114-600-1,0 | 600 | 1,0 | 10,3 | 17,2 |
| H114-750-0,8 | 750 | 0,8 | 9,4 | 12,5 |
| H114-750-0,9 | 750 | 0,9 | 10,5 | 14,0 |
| H114-750-1,0 | 750 | 1,0 | 11,7 | 15,4 |
| NS35-100-0,6 | 1000 | 0,6 | 6,4 | 6,4 |
| NS35-100-0,7 | 1000 | 0,7 | 7,4 | 7,4 |
| NS35-100-0,8 | 1000 | 0,8 | 8,4 | 8,4 |
| NS44-1000-0,7 | 1000 | 0,7 | 8,3 | 8,3 |
| NS44-1000-0,8 | 1000 | 0,8 | 9,4 | 9,4 |
| C10-899-0,6 | 918/899 | 0,6 | 5,1 | 5,7 |
| C10-899-0,7 | 918/899 | 0,7 | 5,9 | 6,6 |
| C10-1000-0,6 | 1022/1000 | 0,6 | 5,6 | 5,6 |
| C10-1000-0,7 | 1022/1000 | 0,7 | 6,5 | 6,5 |
| C18-1000-0,6 | 1023/1000 | 0,6 | 6,4 | 6,4 |
| C18-1000-0,7 | 1023/1000 | 0,7 | 7,4 | 7,4 |
| C15-800-0,6 | 940/800 | 0,6 | 6,5 | 6,0 |
| C15-800-07 | 940/800 | 0,7 | 6,55 | 6,9 |
| C15-1000-0,6 | 1018/1000 | 0,6 | 6,4 | 6,4 |
| C15-1000-0,7 | 1018/1000 | 0,7 | 7,4 | 7,4 |
| C21-1000-0,6 | 1000 | 0,6 | 6,4 | 6,4 |
| C21-1000-0,7 | 1000 | 0,7 | 7,4 | 7,4 |
| C44-1000-0,7 | 1000 | 0,6 | 7,4 | 7,4 |
In the table, everything seems to be clear. The dimensions of the profiled sheet are also indicated as prescribed in the standard: profile height, sheet width and metal thickness. Length – by agreement or according to the capabilities of the manufacturer. Questions may be where the width is indicated through a fraction. For example, 1022/1000. The first digit is the full width for wall cladding, the second is the working width for roof mounting. As you can see, this is a dual-use material. It can be applied both on a roof, and to a covering of walls.
It is worth saying that if the profiled sheet parameters do not comply with GOST, this does not mean that the material is bad. It is necessary to look at the quality of the coating, the rigidity of the sheet. In any case, it is worth looking for reviews on the products of a particular manufacturer. Because even standard ones can be made not so hot. It’s all about the quality of steel and coatings.
How to define quality
First of all, an external examination. The quality of applying paint, polymer or galvanizing is the first indicator. There should be no sags, streaks and bald spots. GOST allows for abrasions and small scratches that do not damage the integrity of the protective layer. That is, if the scratch has not reached the metal, this is normal. During transportation, this happens all the time. The main thing is that the coating is intact.
One of the indirect indicators of the quality of a profiled sheet is its weight. Reference values are indicated in GOST (available in the table). If the weight is significantly lower, this means that a thinner sheet or less dense (and cheaper) metal was used.
Direct evidence of the reliability of the manufacturer is the thickness of the sheet. If the declared thickness corresponds to the real one, this is a good sign. How to measure sheet thickness? With an electronic caliper. Not as expensive a tool, but easier to use. If you have a regular one, you can take measurements with it. But keep in mind that the actual thickness – with a layer of paint or polymer – should be at least a little (by a few micrometers) more than the declared one. This difference will be shown by an electronic device. A mechanical one will not cope with such a task.