Designations of foundation blocks. FBS concrete blocks dimensions, weight and markings

Figure 1 — Appearance of FBS blocks

Solid foundation blocks (FBS) are reinforced concrete products, they are part of the foundation that distribute the load on the base.

The blocks provide the ability to perform quick installation and are less susceptible to the influence of external factors compared to a monolithic foundation. Blocks for foundations and walls have:

• strength;
• wear resistance;
• long service life.

To learn in detail about the dimensions and weight of FBS blocks, learn to decipher the markings and understand how foundation blocks are laid, we recommend that you read the publication in full or go to the section that interests you.

FBS are manufactured in the shape of a parallelepiped. For production can be used:

• heavy concrete;
• medium density silicate concrete.

Concrete blocks are not reinforced. Various technologies are used to produce concrete blocks for the foundation, the most common are:

• natural drying (100% strength is achieved on day 28);
• steaming (forced drying to obtain 100% strength in a short time. A block located in the steaming chamber for a day acquires strength from 70% and above).

The most important ingredient in a block is high-quality concrete. The end part of the FBS has grooves that are filled with mortar during installation work.

Figure 2 - Form for filling

The block manufacturing process is as follows:

1. Prepare a concrete mixture using cement, aggregate and water (the solution is mixed using paddles).
2. Load the solution into the block mold (by hand or using ).
3. Compact the solution (used to compact the solution). The concrete compaction process takes a few minutes.
4. Remove the finished blocks after 24 hours (removal occurs earlier if hardening accelerators are used).

To prevent the block from drying out, cover it with plastic wrap and occasionally water it with water. This is necessary for the block to gain strength.

Types and markings

Reinforced concrete products are manufactured in accordance with. They are:

• FBS - solid;
• FBP - hollow;
• FBV - solid with a cutout (designed for passing communications under the ceiling and laying jumpers).

Figure 3 — Structure of block marking symbols

Using an example, consider a block marked FBS-12-Z-6t. When marking, decimeters are used, so the decoding of the marking sounds like this: FBS is a solid block, 1180 mm long, 300 mm wide, 600 mm high, made of heavy concrete.

The letter designations at the end of the brand are deciphered:

• t - heavy concrete;
• n - on porous aggregates (expanded clay concrete);
• c - dense silicate.

In addition to markings, stamps of the manufacturer (including quality control department) are indicated on the block. Pay attention to this when purchasing.

Specifications

Figure 4 - Dimensions of the FBS concrete block

These products must:

1. Made from compressive strength concrete class B7.5 (concrete grade M100) or B12.5 (concrete grade M150). It is possible to produce blocks from concrete with a compressive strength class that differs from that presented in Table 2. For heavy concrete, the indicators are no less than B3.5 (M50) and no more than B15 ().
2. Be frost-resistant (F50).
3. Be waterproof (W2).
4. Be dense (2200 - 2500 kg/m3, heavy concrete).

Table 2 - Technical specifications

Block brand	Concrete class by compressive strength	Consumption of materials		Block weight (average density 2400 kg/m3), t
		Concrete, cubic meters	Steel, kg
FBS24.3.6-T	B7.5	0,406	1,46	0,97
FBS24.4.6-T	B7.5	0,543	1,46	1,30
FBS24.5.6-T	B7.5	0,679	2,36	1,63
FBS24.3.6-T	B7.5	0,815	2,36	1,96
FBS12.4.6-T	B7.5	0,265	1,46	0,64
FBS12.5.6-T	B7.5	0,331	1,46	0,79
FBS12.6.6-T	B7.5	0,398	1,46	0,96
FBS12.4.3-T	B7.5	0,127	0,74	0,31
FBS12.5.3-T	B7.5	0,159	0,74	0,38
FBS12.6.3-T	B7.5	0,191	0,74	0,46
FBS9.3.6-T	B7.5	0,146	0,76	0,35
FBS9.4.6-T	B7.5	0,195	0,76	0,47
FBS9.5.6-T	B7.5	0,244	0,76	0,59
FBS9.6.6-T	B7.5	0,293	1,46	0,70

Step-by-step instructions for laying the foundation

To begin laying concrete blocks for the foundation, dig a pit (trench). To ensure that installation does not cause inconvenience, it is important to find out the dimensions of the FBS blocks (Table 1) and dig a wider trench. The bottom is cleared of rock, irregularities are smoothed out, and the base is filled with sand. In sandy soil it is not advisable to do this work. In order for the laying of a concrete block foundation to be successful, it is necessary to prepare the foundation.

Preparing the base

Figure 5 - Concrete block foundation

For a sand base you will need a wooden beam, 50 - 100 mm in height. Make the sand embankment 200 mm wider than the base of the foundation. After installing the wooden beam (be sure to check the evenness of the surface), moistened sand must be poured inside the frame and compacted.

To increase the area of ​​the base, the initial row is laid wider than the main part (you can use FL foundation slabs or fill the base with a monolithic one).

The gap between laying slabs can reach 700 mm. Next, lay the first row of FBS in such a way that the seams located vertically are above the pillows.

Laying blocks

To begin installing a foundation made of FBS blocks, you need to understand how to lay the blocks. Installation work begins with marking. The stakes are installed according to the drawing, and the thread is pulled along them. To make laying the row easier, first place the blocks at the corners and intersections. Fill the vertical seams with mortar or tamp down as much as possible with earth. The space between the blocks that appears during installation is filled with concrete and leveled until a monolithic insert is formed between the blocks.

The layer of mortar between the top and bottom rows must be at least 15 mm. Vertical seams are tied with a layer of concrete 250 - 600 mm. To strengthen the dressing between the rows, use reinforcement. During laying, do not forget to make a hole for the sewer pipes.

Advice! When laying the foundation, use such types of concrete foundation blocks as FBS24.4.6-T. Their length will allow you to rationally distribute the load on the body of the slab, reduce the number of seams, and save time (select the width and height at your discretion).

Sizes and prices

Depending on the size of FBS blocks, manufacturer and region, the price may vary.

For example, an FBS block with dimensions 880 x 300 x 580 FSK "Tores" in the city of Ufa costs 655 rubles per piece, and the company "Stroykomplekt" in Moscow offers the same product for 843 rubles. per piece

Table 3 - Dimensions and average price per piece in Moscow

FBS 4-3-3	358 rub.
FBS 4-3-6	612 rub.
FBS 6-3-6	863 rub.
FBS 6-4-3	848 rub.
FBS 9-3-6	640 rub.
FBS 9-4-3	831 rub.
FBS 12-6-3	836 rub.
FBS 12-6-6	RUB 1,742
FBS 24-5-3	RUB 2,253
FBS 24-5-5	RUB 2,612

Advice! When purchasing concrete blocks, in addition to the price, ask the seller how many days the block took to gain strength.

Figure 6 - Appearance of a reinforced concrete product for a foundation 200 x 200 x 400

Foundation block 200 x 200 x 400, the price of which is 55 rubles. per piece, is not a type of FBS blocks. It is made of concrete grade M100 and has a frost resistance rating of F50. But due to its small size, experienced builders do not recommend using it at the base of the foundation.

The advantage of foundation blocks 200 x 200 x 400, the price of which is pleasing to the eye, is the ability to lay the foundation in places inaccessible to vehicle access. The weight of one block is in the range of 30 - 35 kg, and for a one-story building (cottage, bathhouse, barn), concrete blocks for a foundation of this size are just right.

Conclusion

FBS blocks are popular among professional builders. There are many varieties of concrete blocks, the main indicator of the size of the FBS is the width (for the construction of the foundation, this indicator is primarily important). Having learned to decipher the FBS brand, you can determine in a matter of seconds what size the concrete block for the foundation is, what concrete it is made of and whether it matches the price.

Today, when building a foundation, most developers use a material such as concrete blocks. These products do not require formwork, and their high strength indicators are achieved thanks to the factory technology of vibration and steaming of concrete. When building houses on weak soil, foundation pads are used to support the blocks. These are wide prismatic plates, which reduces the pressure on the ground. In addition to the construction of prefabricated foundations, blocks of different sizes are used for the construction of retaining walls, fences, platforms and overpasses.

Description of the foundation block

The product is in great demand today in the construction of residential or industrial buildings.

And this is not surprising, since this building material has the following advantages:

1. Construction work occurs quickly, and this does not affect the quality in any way.. When building a foundation by pouring concrete into formwork, you must wait 4 weeks for the structure to gain the necessary strength.
2. All sizes are standardized. This allows you to accurately calculate the required amount of material.
3. No need to purchase additional material. Now you can forget about formwork boards, additives against freezing and setting of concrete.
4. Blocks can be selected taking into account specified characteristics– resistance to water, frost and aggressive liquids.
5. Long service life. If you install it correctly and follow the operating conditions, the completed structures can serve you for about 100 years.

On video foundation blocks:

They are made from B12.5 M150 concrete. Resistance to frost and water of concrete is assigned taking into account the operating mode of the structure and climate conditions. If the site has acidic or alkaline soils, then you need to choose the right type of concrete. In this case, you will have to use blocks with crushed stone. This will give the product resistance to acid attack.

As for frost resistance, this criterion is very important for Russia. The base blocks are made so that they can withstand a certain number of defrosting and freezing cycles. To increase this indicator, various additives must be added to the solution.

It will also be interesting to know what grade of concrete is needed for a strip foundation:

But what grade of concrete is needed for the foundation of a two-story house is described in this

Dimensions according to GOST

The dimensions and price of fundamental blocks depend on their belonging to a specific assortment unit. For example, a BF block differs from FL not only in price, but also in size and shape of the product. When choosing the appropriate size of material, it is necessary to take into account whether the block belongs to a specific unit of the assortment.

FBS dimensions

According to GOST 13579 - 78, the range of blocks includes 14 standard sizes. But the most important characteristic of size remains width, and the other rows are length and height. FBS blocks are classified according to length into types: 2380, 1180 and 880 mm.

In the photo - FBS blocks:

The height of the products can take two marks - 580 and 280 mm. The last size is typical for products with a length of 1180 mm. The range of blocks in width is divided into 4 standard sizes: 300, 400, 500, 600 mm. Here's how to do it right

The smallest FBS fundamental block has dimensions of 880x300x580 mm. But the largest product can take such dimensions as 2380x600x580 mm.

FBV dimensions

In the photo - FBV blocks

The dimensions of the FBV are very similar to the dimensions of the product presented above. And this is no coincidence, because two types of materials have the same GOST 13579-78. But what distinguishes them is the assortment.

The FBV block has three standard sizes, which differ only in width (40.50 and 60 cm). The height of the product can reach 58 cm, and the length – 88 cm.

FBP dimensions

The range of this hollow block contains 3 standard sizes, the difference between which is the width. It can take the following values ​​- 400,500 and 600 mm.

The length is standard and is 2380 mm, as is the height - 580 mm.

Dimensions of BF products

The range of this material includes 53 standard sizes. BFs differ from each other in size and shape. According to these parameters, the blocks are divided into 6 types: 3 of them have a T-shaped shape, two are presented in the form of a cross section. They are shaped like a trapezoid with double the height.

The peculiarity of the profile shape is determined by the digital markings of the fundamental ones - BF1, BF2 and so on.

Each of the 6 standard sizes is produced with its own cross-sectional dimensions:

• BF1 – 200x160x30 mm;
• BF4 – 520x200x300 mm;
• BF6 – 400x240x600 mm.

As for the length of the BF blocks, it is constant. Each material with a unique profile is produced in the form of a measured segment, the length of which is from 1.45-12 m. At the same time, the lengths of 4 standard sizes will vary in the following range: 1.45-6 mm. Standard sizes BF5 and BF6 are obtained in the form of measured segments with a length of 10.3-12 m. But how good a 20x20x40 foundation block is, information will help you understand

Dimensions of FL products

The range of tape blocks includes 126 standard sizes, divided into 10 types, which have the original width of the supporting part. This parameter will change in increments of 200-400 mm.

In this case, the size of the width of FL blocks can be 600-3200 mm. The height of the material is divided into 2 standard sizes - 300 and 500 mm. At the same time, a height of 500 mm is found in products with a width of 20,000 mm. The length of the material is divided into 4 standard sizes, which range from 780 to 2980 mm.

Thus, the size of the largest tape product is 3200x500x1180 mm, although some manufacturers can find products with dimensions of 2000x500x2980 mm. The smallest block has dimensions of 600x300x1180 mm. There is a variety that is also used in the construction of walls.

The video shows the dimensions of the foundation blocks:

What is the composition of concrete for a foundation of 1 cubic meter and how to choose the right composition will help you understand this

What is the composition of the foundation solution and how to choose it correctly is described in the video in this

Manufacturers and cost per piece

It is difficult to accurately determine the cost of a foundation block. Each manufacturer sets its own price. It may vary depending on the brand of concrete.

The cost in Moscow is:

• FBS-6-6-6t – 1,100 rubles/piece;
• FBS-12-6-6t – 2,200 rub./piece;
• FBS-24-6-6t – 4,100 rub./piece;

As for manufacturers, there are also a lot of them. You need to choose only proven brands.

These include:

• Dörken;
• Mustang;
• Golden mandarin Quadra.

Foundation blocks are a popular building material with which you can achieve a durable structure while saving money on the purchase of unnecessary auxiliary products. A wide range allows you to choose the ideal option for your region. The structure made from blocks will be distinguished by its high strength and long service life.

Foundation wall blocks are products made from heavy, dense silicate and expanded clay types of concrete, intended for the construction of prefabricated foundations, basement walls, plinths and underground construction. They are recommended to be purchased if you need to quickly install underground structures; in terms of strength characteristics and load-bearing capacities, they are second only to monolithic reinforced concrete ones. The scope of application includes both private low-rise construction and high-rise buildings.

FBS have a solid rectangular cross-section and loops that facilitate the process of transportation and installation. They are designed primarily for weight loads, are not reinforced, according to GOST 13579-78, metal is used only for embedded elements. High strength properties are achieved by using heavy grades of concrete (from 1800 to 2400 kg/m 3 depending on the brand) and compacting the mortar when pouring. Dimensions, along with other parameters, are also regulated by GOST 13579-78.

Deviations from the design dimensions cannot exceed ±13 mm in length and ±5 in height and width; good geometric accuracy of FBS is considered their important advantage, allowing to avoid errors during the construction of structures. The weight is not regulated, unlike the minimum permissible density of the mortar. In practice, it varies from 0.25 to 2 tons and is necessarily taken into account when calculating the number of blocks loaded into a machine for transportation and when checking load-bearing capacities.

General performance characteristics include:

• Compressive strength class of concrete, the minimum permissible value is B3.5 for FBS made of expanded clay concrete, B12.5 for dense silicate concrete, the upper limit is B15. On average, this corresponds to 100 to 200 kgf/cm for the blocks themselves.
• Specific gravity – up to 2400 kg/m3.
• Frost resistance – 50 cycles.
• Water resistance - from W2. If it is necessary to enhance the hydrophobic properties, the surface of the products is treated with appropriate compounds.
• Durability declared by manufacturers is within 60-120 years.

Features of using blocks

Laying is carried out on the ground or a pre-prepared sand base; important technology requirements include the absence of snow or water at the bottom of the trench. The dimensions and weight of the foundation blocks exclude the possibility of their independent installation without the use of lifting equipment; even before the start of construction, it is necessary to ensure the availability of convenient access. The corner elements of the masonry, including internal partitions, are installed first; they act as beacons for the remaining rows and, as a result, require careful checking of the level and markings. Vertical and horizontal seams are tightly filled with mortar, FBS are placed offset, ideally by half, but not less than 25-60 cm.

Moving and lowering is carried out from a crane; even before starting work, the condition of the hinges should be checked; they must be free of concrete. At the preparation stage, the surface of the products is cleaned of dirt and slightly moistened. In order to save money, you can purchase foundation blocks without hinges (manufactured by agreement), but their lifting and laying will be impossible without the use of special gripping equipment. The need to reinforce the prefabricated strip with metal depends on the height and purpose of the structure being built; during the construction of basement walls, every second row is reinforced.

The minimum thickness of the horizontal concrete layer is 15 mm, vertical joints are filled on both sides and cleared. Important requirements include compaction of the mortar when filling joints; voids are fraught with displacement of the base or base during operation. All openings for communications are thought out in advance and laid at the installation stage. To enhance the durability of the structure being built, all joints are treated with hydrophobic compounds, and the top row is waterproofed by analogy with monolithic reinforced tape. In order to eliminate the risk of low-quality products, the presence of a passport is checked, including the manufacturer’s details, markings, date of manufacture, main performance characteristics confirmed by laboratory tests and the standard number.

Cost of FBS blocks

Marking	Dimensions, mm	Element volume, m 3	Weight, t	Price, rubles
FBS 9.3.6-t	880×300×580	0,146	0,35	870
FBS 9.6.6-t	880×600×580	0,293	0,7	1415
FBS 12.3.6-t	1180×300×580	0,197	0,48	1010
FBS 12.6.3-t	1180×600×280	0,191	0,46	950
FBS 24.3.6-t	2380×300×580	0,406	0,97	1740
FBS 24.6.6-t	2380×600×580	0,4815	1,96	3460

Size and cost are inextricably linked; they range from 500 rubles for additional products to 4,000 for large-sized ones. FBS 24.4.6 is in maximum demand; it is optimal when it is necessary to quickly install a prefabricated strip foundation or basement walls.

The price is influenced by the brand of concrete, the region of construction (the closer the manufacturer, the lower the delivery costs) and manufacturing technology.

Prices for blocks obtained by accelerated stripping are lower than those cast in ready-made molds; they are characterized by a slight draft. Another criterion is the method of drying used: steamed ones are more expensive, while those that gain brand strength naturally. The latter is due more to the urgency of completing the order than to the improvement or deterioration of performance characteristics; many builders give preference to products that harden for exactly 28 days.

FBS is an abbreviation for reinforced concrete blocks. The abbreviation stands for foundation concrete solid. Such blocks are made from heavy types of concrete and are used to create strip foundations and erect walls. High, creating special strength for the finished product, allows you to use foundation blocks in the construction of plinths for various objects, choosing the required dimensions. They are convenient to use in the construction of garages equipped with inspection holes and cottages. The construction of greenhouses, warehouses, farm premises for keeping animals, and various industrial facilities cannot be done without them. With the help of FBS blocks, massive plinths are constructed for buildings that create a large load on the base of the building.

Small-sized species are used for the construction of temporary road signs. Sometimes they are used to prepare devices for placing small advertising or information boards.

For the convenience of consumers, who widely use them in modern construction, wall foundation blocks are manufactured in various sizes approved by GOST.

When concrete products are poured at the factory, they are reinforced using mounting wire. The end part of concrete products of this type has specially created grooves, which are filled with mortar when laying. During installation, they are installed using a crane and secured together with cement mortar.

What sizes can there be?

Reinforced concrete blocks are produced in accordance with standards that provide for their use in the construction of industrial and civil buildings. FBS blocks have the shape of a parallelepiped. They can be poured with a height of 300 or 600 mm. GOST approved the width of the product. It can be 300, 400, 500 and 600 mm. Their length is 600, 800 or 900 mm. Length sizes of 900, 1200 or 2400 mm are also approved.

All sizes are indicated on the marking, which consists of a set of certain letters and numbers. The higher the numbers in the marking, the greater the weight of an individual specimen.

Heavy types of these concrete products are used for plinths. When constructing walls and partitions, lighter types are used that can be laid manually.

A product marked FBS 24-6-6 t indicates that it is:

1. Wall foundation block.
2. Its length is 2400 mm.
3. The width of the finished product is 600 mm.
4. It has a height of 600 mm.
5. The designation in the form of the letter “t” indicates that a brand of heavy concrete was used for production.
6. It is made in the shape of a rectangular parallelepiped.
7. Its density is not less than 1800 kg/m³.

The type of FBS bearing this marking is the most common among buyers. FBS 24-4-6 and FBS-24-5-6 are two more types of products whose sizes have become the most popular in the construction market.

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How to choose FBS for building a basement?

To calculate the amount of material required to create a plinth and select products of the right size, you need to know the height of the upper part of the finished plinth and its lower part. It is important to determine the width of the foundation and its total length. This will help, using simple mathematical calculations, to calculate the amount required for the work. For calculations, you can use the calculator on construction sites.

When working with large-sized products, use a crane. Small specimens, weighing up to 100 kg, are mounted manually.

To perform basement work, use FBS blocks 9, 12 or 24. The numbers indicate the length. The higher it is, the greater the load that the structure created from them can withstand.

Their installation is carried out staggered, using the same technology that is used for laying bricks. They are laid on cement mortar, four or five rows in height, making all the necessary dressings of the internal and external walls. After finishing the masonry, a reinforced belt is created around the entire perimeter and the ceiling is installed on top. After the wall is erected, the structure is treated with tar, creating a layer of waterproofing.

When choosing FBS foundation blocks for construction, the entire process of constructing a building that will stand firmly for a long time is accelerated.

The dimensions of standard reinforced concrete structures allow you to calculate the required amount of materials to create a basement floor.

FBS foundation blocks: how to correctly determine the required dimensions and calculate the required number of products for the quick and error-free construction of a reliable prefabricated foundation for your home

A good home always begins with a strong foundation, and this axiom underlies the design and technology of constructing strong and durable buildings.

In modern construction, prefabricated and combined foundations are becoming increasingly popular, which significantly reduces the cost of the “zero” cycle of building a house without loss of strength. For this purpose, FBS blocks are used, the dimensions and strength of which make it possible to select all elements in full accordance with the design parameters.

In order for the choice of foundation blocks to be correct, it is necessary to take into account that the foundation must not only support the weight of the building, but also distribute it evenly over the ground.

Technical properties and features of FBS blocks

The manufacturer must ensure exact compliance of the strength and geometric characteristics of the blocks with the requirements of GOST 13579-78, because any deviation can subsequently lead to rapid destruction of the building. FBS foundation blocks are a parallelepiped made of heavy expanded clay or silicate concrete with a density of at least 1800 kg/m³ without voids, with technological preforming for vertical reinforcement of the masonry with mortar. The strength class of concrete is not lower than B 7.5.

The manufacturing technology involves compacting concrete on vibrating tables, and special flasks provide the specified dimensions and a dense, smooth surface. Products with a violation of the geometry will subsequently not allow the construction of even masonry, and the thickness of the seams will be greater than the standard values ​​(2-5 mm), which can damage the entire structure. A high-quality, dense surface serves as a guarantee against premature cracking and destruction even in a damp environment.

GOST for FBS blocks regulates the manufacture of products with a length of 2380, 1180 and 880 mm. In this case, the width varies from 300 to 600 mm with an interval of 100 mm, the height can be 280 and 580 mm. Products with a height of 280 mm are practically not used in modern foundation construction due to the low load-bearing load at almost the same price, so many manufacturers do not include them in their range.

Overall dimensions in decimeters are included in the markings, rounded up to a larger value. For example, the FBS 24.4.6 block has actual dimensions of 2380x400x580 mm. The letter “C” in the block type designation means that the structure is solid. This is the largest product in the offered range, which allows for the fastest possible construction of the foundation, but also has the maximum weight when manufactured from heavy grades of concrete (M 100, M 200) - 1.96 tons.

It is also necessary to take into account that the weight of FBS blocks, even the smallest ones, reaches 260 kg, which requires the use of heavy special equipment when working with them.

Some manufacturers offer these types of products of lighter weight, despite the “T” marking of heavy concrete. In this case, they are made either from expanded clay concrete and must be marked with the letter “P”, or from silicate “C”, or were not compacted enough during the production process and may have voids and pores. Therefore, when purchasing, check the brand and weight of FBS foundation blocks and make sure you have a document confirming the quality.

Large-sized FBS blocks are used, in addition to prefabricated strip foundations, for the construction of basement floors and unheated technical structures.

Selection of foundation block sizes

The dimensions of the product, along with its compressive strength class, are determined by:

• strength of the structure being built,
• technological process of assembling elements,
• timing of the “zero” cycle work,
• block price.

The sizes of FBS blocks are selected depending on:

• type of soil, its strength and stability,
• thickness of walls and ceilings,
• the weight of the building, determined by its dimensions and building materials,
• the required structural strength of the foundation,
• type of masonry,
• foundation area.

When selecting sizes and calculating the number of blocks, 4-5 pieces per wall length are considered optimal. For example, for a standard 10-meter wall of a house, 4 blocks 24 dm long would be preferable than 8 pieces 12 dm long.

The more unstable the soil, the larger the dimensions of the load-bearing elements. For example, to build a foundation on clay and loamy soils, which themselves exert pressure on the structure, large-sized FBS 24.6.6 blocks should be used. And for sandy dry soils for laying to a depth of 60 - 70 cm, medium ones are suitable - FBS 12.6.6-t. The same direct relationship between dimensions and the calculated load on the base.

It is a mistake to assume that the width of the blocks is always equal to the thickness of the walls. Wall protrusion on one side is allowed up to 10 cm, and if the protrusion is two-sided, then up to 6 cm on each side. Blocks of different sizes are usually used for the most dense laying and optimal ligation of seams. Foundation blocks made in accordance with GOST 13579-78, due to their high dimensional accuracy and straightness, when properly laid, can minimize the curvature of the combined foundation and serve as an excellent guide for subsequent wall laying.

Small-sized FBS blocks

According to industry standards, products are produced in lengths of 400 and 600 mm for oversized structures. We even offer blocks made of heavy concrete according to specifications with dimensions of 400x200x200 mm for low-rise light houses made of wood and foam blocks. They optimally combine high strength and low weight (on average 31 kg). Such products are indispensable in the absence of special equipment for independent laying of foundations on sandy soils.

Non-standard foundation blocks include FBS 6.6.6 foundation blocks, which are gaining increasing popularity due to their versatility of use for:

• construction of walls of cellars and basements,
• foundations, including columnar ones, for country houses and small cottages,
• in combination with cast strip foundations and as a main element.

They are made from heavy grades of concrete, which ensures high strength and allows walls of any height to be built from them.

Why do you need to know the mass of foundation blocks?

GOST for FBS blocks, in addition to overall dimensions and strength characteristics, provides for weight standardization (in reference format). This is necessary for express quality control, because the standard value of concrete density cannot be determined under construction site conditions.

This parameter will also be required for the correct selection of special equipment for laying blocks, loading and unloading operations, as well as for transporting materials. FBS blocks, the weight and dimensions of which determine the rate of loading products into a vehicle, are transported by 10- and 20-ton vehicles. Having such information at your disposal, you can minimize your costs for transporting such bulky and heavy products. In addition, many companies charge considerable sums for equipment downtime in case of unforeseen situations.

Having chosen a prefabricated foundation, you need to take a responsible approach to the choice of its structural elements. After all, the quality of FBS blocks, the correct calculation of their quantity and size will determine the reliability of the house and its service life.