Tray for heating mains: dimensions, GOST. Reinforced concrete trays for heating mains

2024 Author: Howard Calhoun | [email protected]. Last modified: 2023-12-17 10:16

During the construction of 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 underground or above 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 boxes are used, along which pipes of the heating main pass.

Reinforced concrete tray dimensions

Reinforced Concrete Heating Tray is rectangular in shape and has a gutter configuration. The parameters for the type of width, length and height of different models differ from each other, but these values \u200b\u200bare written in GOST. The structures are made of heavy concrete, which, after hardening, are extremely resistant to various types of loads. In addition, these trays are very frost-resistant.

If you use low quality concrete, it will crack and burst in the cold, so whenwhen choosing trays, you should ask what technology the structures were made of:

• ordinary pressing;
• vibrocasting;
• ordinary casting;
• vibrocompression.

The tray for the heating main will be of the highest quality if performed using the vibration technology method. The most important parameters when laying heating mains in trays are the quality of the material and dimensions. Depending on where communications will take place, certain requirements are imposed on the trays.

Among others, it should be noted that the dimensions of the gutters correspond to the pipes. For example, metal pipes should not be close to the concrete walls of the boxes. This requirement is especially relevant if the pipes are additionally wrapped with insulating material. Therefore, the tray for the heating main is selected somewhat larger than the outer diameter of the piping system.

Today, there are certain standards for the dimensions 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 is also limited, as well as the thickness of the walls. In the first case, the value can be in the range from 530 to 740 mm, while in the second - from 40 to 80 mm. The inner surface of the tray is also important when choosing, 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. Trays weigh from 100 to 3000 kg.

Tray steel

The heating main tray must be made using high strength steel. Usually, steel belonging to the following classes is used for this:

• 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 reinforced concrete trays

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

Assignment of trays

Reinforced concrete trays for heating mains are used to protect pipes from damage and rodents, in order to save heat, to protect against flood and groundwater, as well as to protect against chemicals in places of their accumulation and presence. Such trays are necessary so that the pipes do not interact with air, which prolongs their service life.

Trays for heating mains, the GOST dimensions 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 exclude unforeseensituations. The structures are quite simple, so they can be opened in a short time to eliminate possible system breaks.

Used in conjunction with floor slab trays

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

Overlappings are rectangular and made of reinforced concrete or concrete. These products must correspond in size to concrete trays. The concrete tray for the heating main is covered with a slab, which is made of concrete of the same grade as the complaints. This allows you to maintain the integrity of the structure of the box, which will be ready to serve for several decades. With an increase in the thickness and size of the plate, its price increases, since more raw materials have to be spent on manufacturing.

Classification of trays by stacking method

The tray for the heating main, the dimensions of which are mentioned in the article, may differ in the way of laying. Each variety has its own marking. For example, if the gutter is indicated by two letters - KL, this indicates that you have a channel in front of you with ceilings resting on them. If the designation looks like this - KLp, then you have channels from covers with supported trays.

There is also the designation KLS, which indicates that in front of you are channels from trays leaning on each other and connected by channels. Such channels are suitable for moving inside a person whose height does not exceed 180 cm. It is interesting that only a few companies are engaged in the manufacture of such trays in Russia. Before installation, a sand cushion is placed in the ditch, which is necessary for a strong and direct contact of the gutter with the ground surface. When laying a heating main tray, the dimensions of which are mentioned in the article, it is important to use protective rubber seals, which must be between the covers and complaints. Subsequently, the seams are filled with concrete, which allows you to create a monolithic system.

Deciphering the markings

Reinforced concrete trays for heating mains, the dimensions of which must 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:

• manufacturer;
• product weight;
• date of manufacture;
• marke;
• size;
• strength;
• stamp of technical control.

Deciphering the marking is quite simple. Reinforced concrete gutters are marked with the letter "L". Next, you can find the typical size. Through a hyphen, the manufacturer indicates the maximum load. According to the GOST rules, the length of the product may differ from the typical one, in this case, one more number can be seen in the marking after the main parameters.

Conclusion

Because reinforced concrete trays undergo highload and are used in important areas, their manufacture is regulated by state standards. In them you 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 requirements, then the products cannot be considered of high quality, which is why it is unacceptable to use them in construction.