From the name it is clear that this product is used for building the base of the building. As a rule, most often, especially for individual construction, the tape type of the foundation is chosen, since it allows to equip a full basement room suitable for various purposes. In addition, according to experts, installation of foundation blocks on average costs 2,000 rubles / m3 cheaper than the construction of the formwork and the manufacture of monolith by pouring concrete solution.
When it is advisable to use
- If there is free space on the construction site. Blocks are of considerable weight, and their movement by hand is impossible. Therefore, you have to use a crane.
- With time deficit. The assembly foundation is mounted quickly, it is only necessary to prepare a place for laying the blocks. At the same time, for the construction of a monolithic tape base, it is necessary to erect a fence( formwork), make a reinforcing "skeleton", knead and pour the mortar, take measures to heat it and wait for the concrete to solidify.
- When performing work in adverse weather conditions( for example, in the fall, during a period of severe precipitation), which make it difficult to make a foundation by pouring.
- With insufficient qualification of employees. The construction of a monolith requires knowledge and experience, and the installation of blocks in a trench does not present difficulties.
- If on the performance the tape will be done not continuous, but intermittent. This type of foundation provides additional savings on materials.
Characteristics of blocks
Such block characteristics as size and weight are in direct relationship. Their production is regulated by State Standards. For example, for foundation products - GOST 13579 from 1978.
According to it, the length of the blocks lies in the range of 0.8 - 2.4 m;width 0,3 - 0,5 m;height 0,3 - 0,6 m. Weight of foundation blocks - from 340 kg to 2 tons.
All blocks are named in accordance with the article. For example, product 8-3-6 is manufactured with such characteristics( length x width x height) in "m" - 0.8 x 0.3 x 0.6.Approximate cost - 740 rubles / piece.
It is clear that with this designation, the numbers in the product name indicate its dimensions, expressed in "dm".The abbreviation stands for "F" - foundation;"B" - the block;"C" is solid.
For example, the product FBS 24-5-3 corresponds to the dimensions of 2.4 x 0.5 x 0.3 m, has a weight of 800 kg and costs about 920 rubles / pcs.
For sale are reinforced concrete foundation blocks of various manufacturers. Therefore, they may differ somewhat both in typical sizes and in the brand of used concrete.
For M100( class 7.5), the following data can be given:
- length - from 78 cm to 2.38 m;
- width - from 30 to 60 cm;
- height - from 30 or 58 cm.
- Weight - from 320 kg to 1.96 tons.
- Price within the limits of 445 - 2 670 rub / pcs.
Recommendation
We should try to use longer blocks. Then the number of their joints will decrease, the amount of work on installation, sealing of seams will decrease. And if you consider that you have to pay for every hour of using the crane, it will significantly reduce the cost of construction.
