What is corrugated board: types, description, technical characteristics + marking

Often just called "corrugated," corrugated board is a multipurpose material that is extensively used in packaging, construction, and other industrial applications. Its structure, which consists of two flat linerboards and a fluted corrugated sheet sandwiched between them, is what makes it unique. Its lightweight design allows for exceptional strength and durability, making it perfect for a variety of applications.

Corrugated board comes in a variety of forms, each designed to meet particular requirements. One fluted layer sandwiched between two linerboards makes up single-wall corrugated board, which provides a basic level of strength ideal for shipping boxes and packaging. Double-wall corrugated board has an extra layer of fluting, which increases its strength and capacity for cushioning, making it appropriate for larger objects and more demanding packaging specifications.

Multiple fluted layers provide maximum strength and protection in triple-wall and even heavier grades of corrugated board. These kinds are frequently utilized in applications where durability is crucial, such as industrial storage and large-scale shipping. The weight of the contents, the circumstances of shipment, and the level of durability required all influence the type of corrugated board that is chosen.

Corrugated board’s technical attributes include its Edge Crush Test (ECT), which indicates stacking strength; its Flat Crush Test (FCT), which determines resistance to compression; and its Burst Strength (BS), which measures resistance to puncture. To make sure corrugated board satisfies the performance requirements required for its intended use, these specifications are essential. Corrugated board is frequently marked by manufacturers with symbols that denote its type, strength ratings, and occasionally recycling information, assisting users in choosing the right material for their requirements.

Types Corrugated board comes in various types, including single wall and double wall. Single wall has one fluted layer between two flat linerboards, while double wall has two fluted layers between three linerboards.
Description Corrugated board is a material made of paper-based layers. It"s structured with a fluted (ridged) layer sandwiched between flat layers (linerboards). This design provides strength and durability while remaining lightweight.
Technical Characteristics Corrugated board is known for its excellent strength-to-weight ratio, making it ideal for packaging and shipping. It offers good cushioning properties and can withstand varying levels of pressure and impact.
Marking Corrugated board is typically marked with information indicating its type, dimensions, and sometimes its strength rating. This helps users identify and select the appropriate material for their packaging needs.

"With its characteristic wavy shape, corrugated board is a versatile roofing material that provides strength and durability for a range of applications. The various varieties of corrugated boards, their physical characteristics, technical details, and marking systems for identification are all covered in this article. Understanding these materials and their markings will help you select the best roofing solution for your needs, skillfully balancing cost, durability, and aesthetic preferences, whether you’re thinking about corrugated metal, fiberglass, or PVC options."

The structure of corrugated metal

In fact, roofing tin elevates profiled sheets, which are in high demand in construction for restoration and repair work. The material is based on standard cold-rolled steel that has undergone hot galvanizing. Every brand of corrugated metal is double-sided galvanized.

Its extent is determined by the thickness of the sheet metal used as the foundation for the production of corrugated sheets. She fluctuates between 0.4 and 1.2 mm. As a result, the building material’s bearing capacity will increase with thickness.

It appears rather thin to us, but steel is profiled for more reasons than just aesthetics. Rigidity is greatly increased by convex and concave corrugations, which also greatly increases resistance to external and structural mechanical loads. The material is tougher the higher the profile.

The scope is determined by stiffness, which is based on the sheet thickness and profile height. Hofrolists are employed in the building of fences, roofing, and non-removable formwork assemblies for monolithic structures.

Together, they construct floors beneath the flat roof and sheathe freshly constructed and repaired walls. A variety of profiled metal types are required for the aforementioned work.

Naturally, there is no need for decoration when it is concealed behind a corrugated board insulation system or roofing cake. Option that is galvanized is used in these situations. However, the stamps need to be well-designed and protected; their exterior is open for inspection. This is accomplished by covering a metal sheet with layers, each of which carries out a specific function.

Tin is covered in three to ten layers, depending on the production process and the brand of material. Polymer coatings, both decorative and protective, are among them.

We have already mentioned the minimum set of the multilayer system, which is steel that has been galvanized on both sides. The highest version includes colored and transparent shells, primers, and chrome protection.

Classification signs of corrugated board

Note right away that there isn’t a clear corrugated metal unit with multiple uses. Certain criteria make it impractical to use, such as a hard, expensive material when a less expensive one would work just as well. Generally speaking, the area of use specified in the technical passport and marking is advisory and somewhat "blurred."

The type and height of the profile serve as the primary classification indicator of the profiled sheet, making it visually accessible even to those who are not familiar with the intricacies of production.

Its shape can be trapezoidal, rectangular, or wave-like in the cut. Frequently, two or more profile types are combined into one brand, which further adds to the rigidity.

There are metal tiles among the profiled building materials. This metal sheet is actually the same one, but it has transverse and longitudinal corrugations. The mounting of the metal tile and the installation of corrugated board are not the same, even though they have similar characteristics and structures.

The purpose of profiled steel

Naturally, more than just the profile is considered in the unit on variety. It matters what the metal corrugated sheet’s dimensions and thickness are. The functional purpose of the profile is influenced by geometric data.

  • Wall. The production uses thin tin with a thickness of 0.4 mm. Sheets usually have a low profile, from 0.8 to 2.1 cm. Designed for a vertical installation: for wall lining, fences structure, t.e. used where there is no tangible load.
  • Roofing. The manufacture uses steel with a thickness of 0.4 – 0.7 mm. Profile in roofing material from 2.0 cm to 10.0 cm. In low -rise construction, sheets with a corrugation of 3.5 cm are most often used. However, there are times when, purely with design purposes, they use either a more flat or more convex material.
  • Carrier. Release from tin 0.7 – 1.2 mm sheets with a profile height from 7.5 to 10.0 cm. To enhance the bearing capacity, this corrugation of this variety of material is supplemented by specialized grooves. It is used in the construction of ceilings, including under a monolithic concrete roof.

The brands from the "border" Hofra height are obviously global. For instance, sheets with a 2.0 to 2.5 cm profile can be used for fence construction as well as roofing. Additionally, steel panels with a profile between 7.0 and 8.5 cm are appropriate for building the supporting structure as well as for applying the coating.

It’s best to consider both price and the presence of a decorative shell when selecting a brand from competing offers. Building an expensive fence or using a material with a decorative color coating as a base beneath a pouring concrete screed are not reasonable construction methods.

It is noteworthy that the roofing variety possesses a particular characteristic. There is a capillary groove that extends from the side where the subsequent sheet overlaps it during installation.

Furthermore, it ensures that the entire set of habitations needed to arrange the roof is released, including the droppers, yendovs, skates, pediment and cornice strips, and adjacent planks.

Geometric data of sheets

It is insufficient to simply understand what a wall profile or roofing system is in order to make an informed material selection that addresses particular issues.

In order to determine the material consumption, we also need the following basic geometric parameters:

  • Length. The sheets are delivered to the construction or repair objects with a sharp. It"s convenient, t.To. No need to make overlaps along the transverse edge of the panels, fewer seams – less possibility for leakage. Cut with a step of 0.5 or 1.0 m, depending on the equipment settings.
  • Thickness. Affects the bearing abilities and weight of the material. The mass of the roofing, distributed to 1 m of projection, is usually indicated in the technical documentation by the manufacturer.
  • Width. More precisely, two widths. One of them is a common, which is a real width of a corrugated panel, the second is useful, used in the calculation of the required amount of material.

The overall width and the useful magnitude of the side overching—which is used to lay corrugated steel on roofs or ceiling beams—differ.

The height of the corrugation is mostly determined by the width. The material’s width decreases with increasing altitude. The separation between the waves and the existence of extra grooves situated in between the metal profile’s primary components have an impact as well.

The material labeled C8 measures 1.2 meters in width in its entirety and 1.15 meters in useful length. The professional NS 35 has a useful width of 1.0 m and a full width of 1.06 m. The complete width of the rush brand H75 is 0.8 m, usefully 0.75 m.

In the event that a low-sloping roof structure is designed with profiled sheets, the beneficial width value is reduced by an additional corrugation, t.To. When styling, it is necessary to block not just one, but two waves.

Consider the general, or Gabarit, width if the design is not required for the structure, as in the case of fences built with brick pillars in between exactly one panel. In every other situation, the computations must be helpful.

Protective and decorative coating options

Galvanizing is applied to profiled sheet in order to prevent rust during production. Both the outer and inner layers are applied, totaling 275 grams applied on both sides, spread over 1 m 2 of materials.

Her molecules rapidly bond with air molecules, and the galvanizing is unstable. It is corny withdrawn after 5 years without further protection, as manufacturers provide minimum warranty periods for such materials.

The material is shielded from damage and the anti-corrosion barrier itself when the polymer membrane overflows. keeps the molecules from vanishing and also greatly enhances the roofing tin’s appearance.

The following choices are among the polymer shells that are utilized in the creation of profiled sheet:

  • Polyester. The most common type of shell protecting galvanizing and the material itself. The re. Behaves well in areas with a temperate climate. It happens with a glossy layer of 25 μm, and a matte layer of 35 μm.
  • Pural. This is a chemical symbiosis of polyurethane and polyamide, which is extremely resistant to the action of UV. In the marking of corrugated sheets with this coating, Pural is affixed. The thickness of the panel shell is standard, is 50 μm.
  • Plastic. The main component of this variety is polyvinyl chloride (the well -known PVC). Denoted by Latin letters PVC and PVC are applied with a thickness of 200 microns, used in regions with a complex climate.
  • Polydictorionad. This is a mixture of polyvinylfluvetoride with acrylic, resistant to chemical aggression, characteristic of next to chemical plants and boiler facilities. In the documentation and in the labeling, it indicates the PVF shell thickness in the range of 40 – 75 μm.
  • Print. Attracts an aesthetic component imitating the texture of valuable wood, masonry or brick masonry. Profiled sheets with such a shell are more expensive, they look better, but practically cannot be renovated if the coating is restored to restore.

Complementing the listed types of coating components that enhance both practical and aesthetic qualities are profiled metal manufacturers. The formulas are not revealed, and these additions are kept under wraps.

Many manufacturers use a laminated shell to guard against mechanical damage to the majority of polymer coatings. Its application raises the coating’s cost by 7–10%, so the manufacturer applies it to this layer only after consulting with the client.

The polymer membrane’s color is chosen based on the RR tables (created by Ruukki) as well as the widely recognized table of RAL shade and ring gradations.

Marking – brief description

The profiled metal’s marking contains all of its information. You can quickly select the necessary material even in the absence of a visual inspection if you understand the meaning of each letter and digital symbol. For instance, when putting an order on a website, this is done.

In actuality, the labeling is a code that indicates the kind of material and its properties. Let’s examine what they mean by a particular instance.

Assume we enjoyed the content found in 18-0.6-750-2500:

  • WITH – the first letter denoting the type and purpose of the material. In the Russian marking, the letter C is assigned to a wall profiled metal, n – the carrier, the universal, used in roofing, in the structure of fences and in the sheathing.
  • 18 – The figure after the letter. This is the height of a ribbed profile or a smooth wave. It mainly determines the sphere of use of corrugated steel.
  • 0.6 – the thickness of the steel sheet used in the production. Talks about the bearing capacity of the material.
  • 750 – the size of the full width of the sheet. Do not forget that in the calculations of the amount of material for the roof or structure of another structure, the beneficial value of the width is used.
  • 2500 – The length of the profiled panel.

We enumerate. This corrugated wall is purchased for a fence or for use in a home’s walls. Using verandas, wood sheds, farm buildings, and other similar structures as roofs is permitted.

Made of 0.6 mm thick steel sheet, the material is quite durable and can withstand wind and snow loads. The height of the corrugation is just 1.8 mm. It is 2.5 m long and 0.75 m wide.

Tips to help the buyer

A thorough understanding of the subtleties involved in material selection and marking is only one aspect of the situation. Don’t make a mistake when purchasing the future owner will benefit from these helpful suggestions from seasoned roofers:

  • Buy material for work from one supplier. Immediately calculate the expense to purchase from one batch. So that you do not have to long and painfully look for one sheet of corrugated tin of a similar tone and thickness.
  • Purchase elements and fasteners together with the roofing. You can, of course, then in another store, but the shade may differ. If this was not provided for design, the effect can be absolutely unexpected.
  • Pay attention to the integrity of the packaging. There should be no damage. It is possible that under the gap there is already a microcrack in the polymer shell. This means that there is the possibility of the appearance of the hearth of rust.
  • Consider the sheets and dose. When identifying the smallest scratches or scuffs, feel free to contact the seller to replace.
  • Buy repair paint to the tone of the corrugated coating. It will come in handy during installation and after, if the damage left by branches or vandals is detected. Do not buy coloring aerosol compounds.

If you want to avoid wasting money, it is worthwhile to follow these suggestions. You cannot, of course, follow the suggestions made unless you have extra savings that you can readily part with.

Special tools are not needed for corrugated steel. Dust is immediately washed from its surface by the rain. When sliding down slopes, snow doesn’t leave scratches or divorces.

If continuous contaminants are found, it is advised to wash with a soap solution and wipe with a gentle cloth.

A versatile material with many uses in packaging, construction, and other industries is corrugated board. Its characteristic wavy pattern is lightweight and strong at the same time. Corrugated board comes in a variety of forms, each intended for a particular use.

Corrugated boards with a single wall, double wall, or triple wall are the most popular varieties. Single-wall boards work well for displays and light-weight packaging. For larger objects or shipping containers, double-wall boards are utilized because they provide greater strength. Triple-wall boards are used for heavy-duty packaging and storage because they offer the highest level of durability.

Depending on the type and intended application, corrugated board has different technical characteristics. Usually, a fluted corrugated medium is layered between layers of flat linerboard to create these boards. The board’s strength and cushioning capabilities are determined by the size and thickness of its flutes.

Important information like material specifications, weight restrictions, recycling symbols, and manufacturer details are marked on corrugated board packaging. Comprehending these indicators guarantees appropriate management, preservation, and repurposing of the packaging components.

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Denis Shcherbakov

Professional roofer with 20 years of experience. I know everything about the installation, repair and maintenance of various types of roofs. I will be happy to share my knowledge and experience with you.

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