
Двойной каркас ЛСТК"©
Double Wall System LGSF©
Please note: ONLY for owners of SFS Int. equipment a License is issued for the construction and production of building frames using a Double wall system (no exceptions)
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It is better to see once
On the example of the construction of an apartment building


And now more about the system "Double Wall system LGSF"
The double wall is filled with any type of lightweight concrete. Clearly shows the full filling of the entire space
Combining the "Double wall LGSF" and various heaters, lightweight concrete, fillers, we offer the desired wall thickness. LGS profile is put “in break”, creating a double contour of the building, independent from each other.
Using any type of isolations: mineral wool, basalt wool, ecowool, etc.), as well as any type of lightweight concrete (foam concrete, polystyrene concrete, aerated concrete, etc.)
Just want to dispel two myths:
1. There is exactly as much metal on a double frame as on a single frame (in rare cases, 7-10% more). Due to the distribution of loads from one on two circuits (according to all necessary calculations for seismic, wind and snow loads).
2. The final cost is not higher, but often lower than on a classic single frame with wool insulation. As a result, we get a capital energy-efficient monolitic building at the price of frame technologies.

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The steel frame is completely poured with concrete, closed under reliable protection with cladding plates. What can be even more reliable, strong and durable?!
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In the Light gauge steel frame Double walls, lightweight porous concrete acts as a filler and isolation. No thermal bridges. As a result, we have a steel-concrete monolithic building.
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The frame is competently designed and manufactured from galvanized steel, on high-precision, robotic equipment LGSF.

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Double wall system LGSF© forms a wall of the required width and is poured with any tipe of lightweight concrete.
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A framework (which is simply impossible to incorrectly assemble and incorrectly installe) and lightweight concrete that is protected from external environmental influences - that`s all ...



Concrete filled all the voids of the frame. Now the excess can be removed.

Often we have question is about the behavior of the zinc coating of structures LGSF in the environment of lightweight concrete and the possible formation of corrosion.
The center of cellular concrete (St. Petersburg) conducted comprehensive studies on the safety and corrosion resistance of galvanized structures in foam concrete. LGSF has the zinc coating of class 275 and has a thickness of 20 μ m (GOST R 52246 2004). With an average corrosion of 0.25 µm / year, the durability of LGSF, based only on the durability of anticorrosive zinc protection, taking into account the absence of cracks, will be at least 80 years. Since the low carbon steel used for the manufacture of LGSF in an alkaline foam concrete environment has good corrosion resistance, this further increases the service life of such structures. The service life of residential and public buildings defined GOST R 54257 2010 more than 50 years. This result is recorded in the STO 82866678 3.01.01 2013 and published in the authoritative industry publication " Eurostroy It should be noted that the formation of corrosion on steel with a zinc coating is possible only if there is a constant access of moisture and oxygen dissolved in it.
In the Scientific Works of the III All Russian (International) Conference on Concrete and Reinforced Concrete (Moscow, 12 16 May 2014) in 7 volumes. T.5 “New efficient concretes and technologies.
Light and cellular concrete refers to the study of the properties of monolithic foam concrete in enclosing structures during the construction of the exterior walls of the technical floor of a residential building in the city of Vladivostok. Foam concrete absorption recorded at 110% whereas absorption of moisture by polystyrene concrete (EPS concrete) is less than 10%. Polystyrene composite concrete has clear advantages over other types of lightweight concrete due to its low moisture absorbency, which significantly reduces the risk of corrosion. This is due to the fact
that polystyrene concrete has a more dense structure, unlike other types of lightweight concrete (talking about a density of 350 - 400 kg/m3). Air entrainment is minimal.
Moisture absorption by polystyrene concrete is less than 10% versus 110% in foam concrete .
What are the advantages of a Double wall system LGSF?
Easy to build, reliable to operate.

Fire
- Steel Double frame non-combustible
- Polystyrene concrete:
* flammability group G1 in accordance with GOST 30244-94 (slow- burning, does not support combustion);
* Flammability group B1 according to GOST 30402-96; moderate smoke generating ability according to GOST 12.1.044-89
Water

- The double steel frame with zinc coating is not afraid of water. Metal Zinc coating - Zn of at least 275 g / m2 with a yield strength of at least 350 MPa
- Polystyrene concrete is also moisture resistant - positive buoyancy (does not sink in water). When humidity changes, polystyrene concrete does not deform. Moisture does not affect the heat-insulating properties of polystyrene concrete and does not cause the formation of bacteria and mold in it.







Cold / Heat
- Double frame of LGS eliminates the formation of termal bridges (due two parallel walls that do not touch each other around the entire perimeter)
- EPS concrete - a construction product in thermal conductivity even surpasses wood: polystyrene concrete structures are 0.015 W / micron warmer than wooden
- EPS concrete with a thickness of 30 cm replaces about 1.5 meters of masonry in terms of thermal conductivity
- EPS concrete in LGS Double frame does not interfere with air exchange, that is, the walls are able to “breathe”, and due to the high vapor permeability, they regulate air humidity. As a result, a favorable microclimate is established in the interior, close to the microclimate of wooden houses
- In the case of using Greenboard as a permanent formwork, they are not only a sheathing material, but also a wonderful additional insulation.

Miscellaneous
Double frame LGSF produced on CNC machines is:
- Perfect geometry
- No shrinkage
- High strength of the structure (absolutely not inferior, but in many ways superior to brick structures)
- Seismic resistance up to 9 points (due to the bearing steel frame of the articulated type)
- Erection speed ~ 1.5 - 2 months
- Affordable price
- Do-it-yourself construction without any special skills.
- The complete exclusion of through cracks on the walls for the entire operation of the building
- Flat surface of both external and internal walls
- Easy fastening to the walls of facades, household appliances, furniture, etc.







Another manner of use of the Double wall Light gauge steel frame
Protecting constructions for multi-storey construction from 4 to 40 floors

This huge training complex is also built using our Double wall system



We also use the double frame in the arches