Such a common element of many supporting structures as a channel is a U-shaped profile that can be made of various types of steel, including stainless steel. Channels can differ not only in size (a special table is used to determine each of them), but also in manufacturing technology.
We understand the range of channels
Channels are produced using cold-rolled and hot-rolled technology. U-shaped metal profiles of different brands also have differences in the design of the shelves. Thus, there are channels, the inner edges of the shelves of which are parallel to each other, as well as products, the shelves of which are made with a certain slope on the inside. However, no matter what version the shelves are made in, the entire range of profiles with a U-shaped section is distinguished by high rigidity, combined with low weight. It is these properties that make it possible to successfully use channels of any size for the manufacture of highly loaded structures for construction and any other purposes.
The main advantages of U-shaped profiles include:
- high strength, ensuring resistance to bending loads;
- the ability to successfully withstand not only bending, but also multidirectional loads (rupture, compression, etc.);
- high resistance to shock loads, which can lead to mechanical damage to the structure (a metal channel, which is made with high quality and in accordance with GOST, has practically no weak points in its design that can cause its destruction from various loads).
Parameters of a channel with a slope of the internal edges of the shelves
Classification
Channel types depend on several criteria. In particular, products are divided into the following groups:
- According to manufacturing technology . In this direction, two categories are distinguished: bent and hot rolled. The differences between the products are as follows: hot-rolled channels have a straight or acute angle between the transverse beam and the vertical edges, bent channels have a rounded bend. This category includes welded structures made of two welded angles and H-shaped ones, called I-channels.
- Rolling precision . There are three groups here: A, B, C, denoting high, increased and normal accuracy, respectively.
- Durability . This criterion determines the resistance of the product to dynamic loads. In particular, there are products on the market with regular and increased strength.
In addition, channels are divided into size groups, where the determining criteria are the length and width of the product.
Features of channel 16: dimensions, weight and cost
Channel 16 is widely used for strengthening large-sized structures such as bridges, supports, as well as when pouring the foundations of high-rise buildings. The technical features of a special series of rolled metal products provide for its use in mechanical engineering, carriage building and shipbuilding.
Related article:
Assortment of channels: the ratio of characteristics as a guarantee of reliability. Types, markings and characteristics of U-shaped rolled metal products. Requirements according to GOST, Gosstandart tables. Weight and dimensions of channels.
The main feature is the slope of the edges in the middle of the products, which gives increased bending strength and torsional stability. This product type has three series:
- 16P - used in installation work due to ease of installation;
- 16U – is resistant to vertical loads, which suggests its use in areas with increased seismic activity;
- 16L - due to its low weight, it is used for the construction of monolithic structures and in shipbuilding.
Depending on the design, channels have different purposes
All products comply with specific GOST:
- 8240-97 – hot-rolled channels;
- 8278-83 – cold-formed channels with equal flanges;
- 8281-80 – bent with unequal flanges.
The standard dimensions of channel 16 correspond to the following values:
- height – 160 mm;
- shelf width – 64 mm;
- wall thickness – 5 mm;
- shelf thickness – 8.4 mm.
The weight of channel 16 corresponds to 14.2 kg. There are about 70 m of rolled products in one ton. These indicators directly proportionally affect the pricing of steel profiles. For example, the average price of channel 16 per meter is 520 rubles. Products are produced in lengths from 2 to 12 m.
Helpful advice! The length of the product affects the ease of its transportation. That is why it is not practiced to produce channels longer than 12 m. At the same time, this is the length that is most popular, and special vehicle platforms are designed just for it.
The length of the channel can be different and most often starts from 2 m
Marking according to GOST standards
If we talk about GOST , channels are marked with alphabetic and digital designations. Numerical markings indicate the distance between parallel edges, expressed in centimeters. Letters define additional properties of the product. For example:
- P – parallel arrangement of external edges.
- U – the shelves are located at an angle.
- L – lightweight design.
- E – economic category channels.
- C – special products.
For example, the marking of channel 18AP means the following: a high-precision rolled product with a distance of 18 centimeters between the shelves, which are located at right angles.
Scope of application
As mentioned earlier, channels are used in capital construction. The main purpose of the products is to strengthen concrete structures, which significantly increases the strength and durability of the structure. In addition, channels are used for reinforcing power lines, bridges, industrial buildings and structures.
It is worth noting that perforated products are available for sale. There are special holes designed for quick installation without the use of electric welding. In addition, pipes for quick installation of utilities and cable lines can be located between the shelves.
There are channels made of aluminum alloy, used for the construction of lightweight structures. In particular, internal partitions of interior spaces, shelving, display cases.
Size tables
The size range of channels is quite diverse and does not depend on the manufacturing technology or manufacturer. Standard sizes are used here, which look like this:
- Product height. This is the distance between parallel shelves, measured in millimeters. This parameter varies between 50-400 mm.
- Shelf width. This is the distance from the outer corner of the channel to the tip of the parallel edges. The sizes that play here are 32-115 mm.
- Thickness of the cross beam. Depending on the category, this parameter is 4.4-8 mm.
- Shelf thickness. Depending on the product marking, the thickness of the edges can be 7-13.5 mm.
The length of a standard channel does not exceed 12 meters. It is worth noting that there are products on the market whose length exceeds this value. However, such products are mainly made to order.
With a slope of the inner edges of the shelves. GOST 8240-97
Legend:
- h —channel height;
- b - shelf width;
- S —wall thickness;
- R is the radius of the internal curvature of the shelves;
- t —thickness of the flange;
- r is the radius of curvature of the shelves.
| U series channel number | Dimensions, mm | Weight 1m, kg | |||||
| h | b | S | t | R | r | ||
| no more | |||||||
| channel 5U | 50 | 32 | 4,4 | 7 | 6 | 2,5 | 4,842 |
| channel 6.5U | 65 | 36 | 4,4 | 7,2 | 6 | 2,5 | 5,899 |
| channel 8U | 80 | 40 | 4,5 | 7,4 | 6,5 | 2,5 | 7,049 |
| channel 10U | 100 | 46 | 4,5 | 7,6 | 7 | 3 | 8,594 |
| channel 12U | 120 | 52 | 4,8 | 7,8 | 7,5 | 3 | 10,43 |
| channel 14U | 140 | 58 | 4,9 | 8,1 | 8 | 3 | 12,29 |
| channel 16U | 160 | 64 | 5 | 8,4 | 8,5 | 3,5 | 14,23 |
| channel 15аУ | 160 | 68 | 5 | 9 | 8,5 | 3,5 | 15,35 |
| channel 18U | 180 | 70 | 5,1 | 8,7 | 9 | 3,5 | 16,26 |
| channel 18аУ | 180 | 74 | 5,1 | 9,3 | 9 | 3,5 | 17,45 |
| channel 20U | 200 | 76 | 5,2 | 9 | 9,5 | 4 | 18,37 |
| channel 22U | 220 | 82 | 5,4 | 9,5 | 10 | 4 | 20,98 |
| channel 24U | 240 | 90 | 5,6 | 10 | 10,5 | 4 | 24,06 |
| channel 27U | 270 | 95 | 6 | 10,5 | 11 | 4,5 | 27,66 |
| channel 30U | 300 | 100 | 6,5 | 11 | 12 | 5 | 31,78 |
| channel 33U | 330 | 105 | 7 | 11,7 | 13 | 5 | 36,53 |
| channel 36U | 360 | 110 | 7,5 | 12,6 | 14 | 6 | 41,91 |
| channel 40U | 400 | 115 | 8 | 13,5 | 15 | 6 | 48,32 |
With parallel edges of shelves. GOST 8240-97
| Series P channel number | Dimensions, mm | Weight 1 m, kg | |||||
| h | b | S | t | R | r | ||
| no more | |||||||
| channel 5P | 50 | 32 | 4,4 | 7 | 6 | 3,5 | 4,840 |
| channel 6.5P | 65 | 36 | 4,4 | 7,2 | 6 | 3,5 | 5,897 |
| channel 8P | 80 | 40 | 4,5 | 7,4 | 6,5 | 3,5 | 7,051 |
| channel 10P | 100 | 46 | 4,5 | 7,6 | 7 | 4 | 8,595 |
| channel 12P | 120 | 52 | 4,8 | 7,8 | 7,5 | 4,5 | 10,42 |
| channel 14P | 140 | 58 | 4,9 | 8,1 | 8 | 4,5 | 12,29 |
| channel 16P | 160 | 64 | 5 | 8,4 | 8,5 | 5 | 14,22 |
| channel 16aP | 160 | 68 | 5 | 9 | 8,5 | 5 | 15,34 |
| channel 18P | 180 | 70 | 5,1 | 8,7 | 9 | 5 | 16,26 |
| channel 18aP | 180 | 74 | 5,1 | 9,3 | 9 | 5 | 17,46 |
| channel 20P | 200 | 76 | 5,2 | 9 | 9,5 | 5,5 | 18,37 |
| channel 22P | 220 | 82 | 5,4 | 9,5 | 10 | 6 | 20,97 |
| channel 24P | 240 | 90 | 5,6 | 10 | 10,5 | 6 | 24,05 |
| channel 27P | 270 | 95 | 6 | 10,5 | 11 | 6,5 | 27,65 |
| channel 30P | 300 | 100 | 6,5 | 11 | 12 | 7 | 31,78 |
| channel 33P | 300 | 105 | 7 | 11,7 | 13 | 7,5 | 34,87 |
| channel 36P | 360 | 110 | 7,5 | 12,6 | 14 | 8,5 | 41,89 |
| channel 40P | 400 | 115 | 8 | 13,5 | 15 | 9 | 48,28 |
Characteristics of channel 10: dimensions, weight, cost
The range of channel 10, as a fairly popular rolled metal product, is quite wide. The characteristics of its varieties and types are regulated by GOST No. 8240, developed back in 1989. The properties of products include the parameters of shelves and walls, in particular their height and width, and also the radii of curvature of channels marked 10U are taken into account.
Channel 10 has three subtypes with corresponding markings:
- U – a profile in which the internal shelves are made with a slope;
- P – channel, where the edges of the flanges are parallel;
- E - economical products with parallel placement of shelves.
Helpful advice! Each type of channel has its own designation, for example, 10P, 10U or 10E. The corresponding values are contained in a separate table. Despite the same numerical data, these are different types of products.
The range of channels includes products of various sizes and configurations
The most used in various industries is, due to its size, the 10P channel. It is widely used in individual construction for the construction of load-bearing structures. The number 10 in the marking, in fact, indicates its height, equal to 100 mm, and the letter P indicates the type of profile, while emphasizing the parallel arrangement of the shelves. This type of channel has the following parameters:
- width is 46 mm;
- wall thickness – 4.5 mm;
- shelf thickness – 7.6 mm;
- radius of curvature – 7 mm;
- The radius of curvature at the edge of the shelf is 4 mm.
To determine the weight of channel 10, it is necessary to know the cross-sectional area. This figure corresponds to 10.9 cm². This type of channel is produced in lengths from 4 to 12 m. Longer products are made to order. The weight of 1 meter of channel 10 with a steel density of 7.85 g/cm³, according to calculations, is 8.59 kg. The error in the indicated mass values may be 3-5%. The average price of channel 10 per meter is 356 rubles.
Channels are made by hot-rolled, cold-rolled and by bending metal sheets
Weight
The mass of the channel depends on several parameters. In particular, key roles are played by:
- Length.
- Width.
- Material used.
- Thickness of cross beam and parallel flanges.
There is no need to explain that a 12P made of steel and aluminum alloy will belong to different weight categories with identical external characteristics. In addition, there are multi-shelf products, where the profile implies the presence of side edges of different lengths. Of course, it is possible to calculate the mass of such products, but this requires the use of special formulas.
Channels made to standard sizes weigh from 4.8 to 48.3 kilograms. According to current GOST and European standards, a deviation of 6.5% for each product, provided that the difference in the mass of the total batch does not exceed 4% .
Main parameters of channel 12: dimensions, weight and cost
A metal product called channel 12 with parallel flanges has a body thickness of 7.8 mm and a wall thickness of 4.8 mm. Such products are produced in lengths from 2 to 12 m. Longer copies can be made to order. The popularity of this type of profile is due to its positive qualities, contained in the optimal ratio of weight, strength and relatively low cost.
Profiles made of low-alloy steel are subject to operation at high temperatures and under conditions of increased exposure to chemicals. Also, the products have excellent resistance to compression and bending, but at the same time have poor resistance to torsion.
The weight of 1 meter of channel 12 can be found using the table above or using an online calculator. The price of the product depends on this parameter. According to the table, the weight of channel 12 per 1 meter is 10.4 kg.
Channel 12 - drawing with dimensions according to GOST
Like channels of other sizes, this type of product has additional markings with different characteristics. The most popular is the 12P channel, which has parallel flanges with edges without slope.
The dimensions of the 12P channel are given below:
- width – 52 mm;
- linear meter weight – 10.40 kg;
- length in ton – 95.94 m.
The channel with mark 12 also has other series. For example, 12L is a rolled metal product with dimensions of 120x30 mm, characterized by inclined shelves. The weight of 1 m of such a profile is 5.02 kg, and the footage of 1 ton is 199 m.
Helpful advice! The marking of the channel 12C indicates its special purpose, 12E - an economical series of products with shelves without slope. Their size is standard - 120x52 mm, and their weight is slightly lower - 10.24 kg. Accordingly, a ton of material contains almost 97 m.
Together with the digital value indicating the width of the profile, a letter is placed indicating the structural features of the material
