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Main idea of the Lewis technology is the following – to make the thinnest possible and light structure appropriate for floor deck from wooden beams while saving peculiarities of bearing capacity, stability and long life, pertaining to mass concrete. Lewis-made profile in the shape of the swallow’s tail at first function as a framework that remains, and after concrete setting it serves as cable. Lewis technology performs all the functions, necessary for floor decks.
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Chart of Lewis
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Treatment of the profile surface
| Technical specification |
| Width of the plate |
630 mm |
| Active width |
610 mm |
| Length of the plate |
1220 mm, 1530 mm, 1830 mm, 2000mm |
| Support moment |
Wx=3,0 cm3/m1
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| Inertia moment |
Ix=3,6 cm4/m1
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| Steel thickness |
0,5 mm |
| Profile height |
16 mm |
| Profile proper weight |
0,058 kN/m2 (5,8 kg/m2)
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| General plate thickness |
16 mm, Lewis profile + 34 mm
fine stone concrete B 25 or
cement grout ZE 20 = 50 mm |
| Lewis plate proper weight |
94 kg/m2
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| Lewis bearing capacity according to standards |
500 kg/m2 |
Wide strip, zinc coated steel with content of chrome.
Zinc coating thickness – 275 g/m2 pursuant to standard DIN17162 – group Z 275
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lewis - 1
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lewis - 4
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Traditionally used in private buildings erection. When Lewis technology used, water-proof, stable and ever-lasting basic floor is made, at the same time providing favorable terms for wooden beams exploitation.
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Lewis construction is connected with floor heating. Lewis profile has a function of heat-reflection, heat insulation is laid between the beams.
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lewis - 2
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lewis - 3
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Lewis structure with saving wooden floor cover.
| Peculiarities |
Soundproofing |
Rw=65 dB
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LNW=49 dB
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Lewis structure without wooden floor cover.
| Peculiarities |
Soundproofing |
Rw=65 dB
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LNW=52 dB
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Lewis thin-layer non-cable in block floor structure.
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Lewis floor structure is the optimal solution:
- at cottages erection;
- at old buildings revival;
- at construction of interim floors in industrial and storage premises;
- in any place with lack of possibility to use heavy lifting devices.
| Technical specification |
| Width of the plate |
630 mm |
| Active width |
610 mm |
| Length of the plate |
1220 mm, 1530 mm, 1830 mm, 2000 mm |
| Length of intermediates |
800-7000 mm |
| Thickness of the plate |
0,5 mm |
| Profile height |
16 mm |
| Width of the flange |
37/32,5 mm |
| Specific weight |
5,8 kg/m2 |
| Minimal height of concrete floor |
from 30 to 35 mm, with regard
to area of usage
and necessary loading parameters |
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Working loading of accomplished thin-layer non-cable in block floor structure
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Equalized distributed loading
| Floor deck thickness |
Distance between the beams |
Working loading, kN/m2 |
| 50 mm |
600 mm |
30,2 mm |
| 50 mm |
900 mm |
19,5 mm |
| 50 mm |
1200 mm |
13,8 mm |
| 50 mm |
1500 mm |
9,7 mm |
| 50 mm |
2000 mm |
6,1 mm |
| 50 mm |
2500 mm |
4,1 mm |
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Concentrated loading
| Floor deck thickness |
Distance between the beams |
Working loading, kN/m2 |
| 50 mm |
600 mm - 1000 mm |
7 mm |
| 50 mm |
600 mm - 1500 mm |
3 mm |
| 75 mm |
2000 mm - 2500 mm |
3* mm |
| 75 mm |
2000 mm - 2500 mm |
7* mm |
* Requires additional cabling.
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Options of usage:
- Water-proof floor;
- Segregate deck;
- Stone, ceramic covering, tessera on wooden structures;
- Soundproof floor deck;
- Specific deck constructions.
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Non-cable floor Lewis
