Tray for heating main: dimensions, GOST. Trays ferro-concrete for heating mains

When constructing heating mains, the main pipes, through which hot water flows, are laid in special protective trays made of reinforced concrete. The pipeline system can be located below or above the ground, however in each of these cases the components must be reliably protected from the effects of low temperatures and moisture. For this, special trays and ducts are used, through which the pipes of the heating main pass.

Dimensions of reinforced concrete trays

The tray for the heating duct of reinforced concrete has a rectangular shape and has a trough configuration. Parameters by type of width, length and height of different models differ among themselves, but these values are prescribed in GOST. The structures are made of heavy concrete, which after hardening are extremely resistant to loads of different types. In addition, these trays are very frost-resistant.

If you use low quality concrete, then it will crack and burst in the frost, so when choosing trays, you should ask what technology the following structures were made:

• Ordinary pressing;
• Vibration;
• Ordinary casting;
• Vibrocompression.

Tray for the heating main will be the most qualitative, if carried out by the method of vibration technology. The most important parameters when laying heating mains in trays are the quality of the material and dimensions. Depending on where the communication will take place, the trays are subject to certain requirements.

Among other things, one should note the correspondence of the dimensions of the gutters with the pipes. For example, metal pipes should not be close to the concrete walls of the boxes. This requirement is especially important if the pipes are additionally wrapped with insulating material. Therefore, the tray for the heating main is selected in several large dimensions in comparison with the outside diameter of the pipeline system.

To date, there are certain standards for the size of the trays. For example, the length can vary from 720 to 2970 mm, as for the width, it varies from 570 to 2460 mm. The height of the gutter, as well as the thickness of the walls, is limited. In the first case, the value can be in the range from 530 to 740 mm, whereas in the second case it can range from 40 to 80 mm. The inner surface of the tray is also important in the selection, it can vary from 450 to 2180 mm, while the height of the channel of the inner surface can be equivalent to a limit of 300 to 1200 mm. Weigh trays from 100 to 3000 kg.

Steel for trays

The heat tracing chute must be manufactured using high strength steel. Usually, steel is used for this, which belongs to the following classes:

• A-I.
• A-III.
• Bp-I.

It is used in the first stage to form a metal frame, which is covered with high- or medium-density concrete. This allows you to get reinforced concrete structures with different parameters for laying in the ground.

GOST of reinforced concrete trays

Ferro-concrete trays for heating mains, the dimensions of which were mentioned above, should be manufactured in accordance with state standards 23009-78. Concrete should be made of Portland cement of M-400 grade or higher, in addition, sulfate-resistant Portland cement should be used. Concrete mixtures are also subject to strict requirements, which are prescribed in GOST 26633-91.

Assigning Trays

Reinforced concrete trays for heating mains are used to protect pipes from damage and rodents, in order to save heat, to protect them from flood and groundwater, and to protect them from chemical agents in places where they accumulate and are present. Such trays are necessary to ensure that the pipes do not interact with air, which prolongs the period of their operation.

Trays for a heating main, the GOST standards of which are mentioned in the article, can be used even in seismically hazardous areas. When the gutters are covered with covers, this allows you to eliminate unforeseen situations. The constructions are quite simple, therefore in a short time they can be opened to eliminate possible system discontinuities.

Used together with trays floor slabs

The concrete tray for the heating main must be used in tandem with the slab. It is located on top of the gutter, and it is required that when filling the soil, foreign elements do not get inside. Otherwise, the meaning of the idea is lost, because the pipeline system should not be subjected to additional loads.

The overlaps are rectangular in shape and made of reinforced concrete or concrete. These products must correspond to the size of concrete trays. The concrete tray for the heating main is covered with a plate, which is made of concrete of the same brand as the complaints. This allows you to maintain the integrity of the box structure, which will be ready to last several decades. With an increase in the thickness and dimensions of the plate, its price rises, since it is necessary to spend more raw materials for manufacturing.

Classification of trays by the method of styling

The tray for the heating main, the dimensions of which are mentioned in the article, can differ by the way of laying. For each variety, its own labeling is applicable. For example, if the gutter is indicated by two letters - KL, this indicates that there is a channel in front of you with overlapping on them. If the designation is as follows - KLP, then before you channels from the lids with leaning trays.

There is also the designation CLS, which indicates that in front of you channels from the trays, leaning against each other and connected by the channels. Such channels are suitable for moving inside a person, whose growth does not exceed 180 cm. It is interesting that only a few firms are engaged in the manufacture of such trays on the territory of Russia. Before installation, a cushion of sand is laid in the ditch, which is necessary for the durable and direct contact of the gutter with the ground surface. When the heating duct tray is laid, the dimensions of which are mentioned in the article, it is important to use protective rubber seals, which should be between the covers and the complaints. Subsequently, the seams are poured with concrete, which makes it possible to create a monolithic system.

Decoding of the marking

Ferroconcrete trays for heating mains, whose dimensions should be selected taking into account the pipes used, are marked in accordance with GOST 13015-83. The inscriptions on the products must contain information about:

• The manufacturer;
• Weight of the product;
• Date of manufacture;
• Brand;
• Sizes;
• Strength;
• Stamp of technical control.

Decipher the marking is quite simple. Reinforced concrete troughs are marked with the letter "L". Then you can find the standard size. The hyphen indicates the maximum load through the hyphen. According to the GOST rules, the length of the product may differ from the standard one, in this case one more figure can be seen in the marking after the main parameters.

Conclusion

Due to the fact that reinforced concrete trays undergo a high load and are used in important areas, their production is regulated by state standards. They can find the quality of the concrete used, as well as the operating and installation conditions. If the trays do not meet at least one of the items presented, then the products can not be considered qualitative, which is why it is unacceptable to use them in construction.