DOUBLE CONNECTED WALLS HWE

Double bonded walls HWE represent a higher degree of use of FILIGRAN-type reinforced concrete constructions. The wall unit consists of two thin reinforced concrete slabs (usually 50–60 mm), which form double-sided lost formwork. Their relative position is fixed spatial lattice beams and a space is left inside for solidification with concrete.
The parts are already included they also carry the distribution reinforcement on both cheeks. After concreting, a structure with properties will be created monolithic walls, with high rigidity and reliable transmission of vertical and horizontal loads (ground pressure, wind etc.).

Materials and construction

Concrete prefabrication: C25/30 to C35/45 (according to the project)
Steel / reinforcement: rod 10 505 (R), BSt 500, KARI network (W) – according to the static design
Truss beams:
They ensure the coupling of both plates for handling and assembly
They transfer the horizontal forces from the fresh concrete during solidification
They increase the rigidity of the part in the assembly stage

Possibility of penetrations and installation of installations: windows, door, passages, electric boxes etc.

Dimensions and parameters

Max. dimension of the part (according to production and transport): up to approx 3,5 m × 12,0 m
Height: according to floor height (the outer plate can be higher by the thickness of the ceiling)
The resulting thickness of the finished wall: 200 / 250 / 300 / 350 mm
Weight: in the most common embodiment 2 × 60 mm cca 300 kg/m²
Lengths and shapes: optional depending on the project, including corner pieces, bevels and irregular floor plans

Implementation and assembly

The parts are installed with a crane on the prepared structure (base plate / lower floor ceiling) do cement mortar beds.
In the vertical position, the walls are secured inclined struts (anchoring to the substrate and the part) for fixation and protection against tipping.
It is inserted into vertical and horizontal joints connecting fitting for the mutual interaction of the components in the structure.
In case of a requirement for waterproofing, it is supplemented swelling sealing tape.
It can be placed in the space between the slabs before concreting divorces (electro, ZTI) and prepare passes.
Solidification is most often done with concrete C16/20 (B20) and concreting is underway layer by layer according to the technological procedure.
It is possible in combination with FILIGRAN ceiling boards monolithing of walls and ceiling at the same time, which brings significant rigidity to the entire structure.

Use

Residential, civil and industrial construction
Basement and underground floor (infrastructure)
Buildings in gaps – the possibility of fitting close to the neighboring building
Velevator shafts, shops, collectors
Pabove ground tanks, technological chambers
Retaining and corner walls and earth pressure transmitting structures

Advantages of the system

Quick assembly with minimal carpentry requirements, concrete and reinforcement work
Smooth surfaces on both sides – often without the need for plastering
High dimensional accuracy and shape variability, openings and penetrations
Preservation of the properties of the monolithic construction - reducing the risk of cracks in the joints
Installation possible even at low temperatures (according to construction technology)

Certification and quality

Design of shape and reinforcement is always solved static calculation for a specific project

Production in a controlled quality system 9001:2015 and according to the relevant ČSN/EN for prefabricated concrete parts