Features and benefits
Features
- Low dead weight
- Thin Floor thickness (from 50 mm)
- High permissible load
- Spans (centre to centre) up to 2500 mm
- High impact and airborne sound insulation
- Fire resistance up to 120 minutes
Benefits
- Flexible system construction
- Manufactured from high quality steel
- Sustainable and cost reducing solution
- Easy to install
Technical details
- Nominal width: 630 mm
- Effective width: 580 mm
- Length range: 800—7000 mm
- Steel gauge: 0.5 mm (0.4, 0.6, 0.7 mm available)
- Height of profile: 16 mm
- Flange width: 38/34 mm
- Weight (0.5 mm): 0.058 kN/m2
Steel Quality
S320GD + Z275/Z100 N-A-C according to NEN-EN10147. Other qualities available upon request.
Load bearing capacity & Design information
The LEWIS dovetailed profile has optimized geometry as a result of which the concerted action between the LEWIS metal sheeting and the fine gravel concrete or liquid screed ensures the highest possible load-bearing capacity.
Permissible uniformly distributed load
| span L in (mm) | slap depth D in (mm) | permissible load Qk in kN/m2 (excl. partial factor) |
| 600 | 50 | 36,2 |
| 900 | 50 | 22,7 |
| 1200 | 50 | 14,8 |
| 1500 | 50 | 10,6 |
| 2000 | 75 | 11,3 |
| 2500* | 75 | 8,2 |
Assumptions
- Concrete strength class C20/C25
- Partial factors ζγG = 1,25 en γQ = 1,5 (consequence class CC2)
Permissible concentrated load
| span L in (mm) | slap depth D in (mm) | permissible concentrated load Qk in (kN) excl. partial factor | |||
| no free edges | free edges | ||||
| unreinforced | reinforced* | unreinforced | reinforced* | ||
| 600 | 50 | 3,8 | 5,7 | 2,3 | 3,3 |
| 900 | 50 | 3,6 | 5,5 | 2,2 | 3,2 |
| 1200 | 50 | 3,5 | 5,4 | 2,1 | 3,1 |
| 1500 | 50 | 3,4 | 5,3 | 2,0 | 3,1 |
| 2000 | 75 | 4,4 | 6,5 | ** | 3,6 |
| 2500* | 75 | 4,2 | 6,3 | ** | 3,5 |
- * Reinforcement mesh ∅5-150 (Q131) or ∅6-200 (A142)
- ** Failure mode transverse bending is not considered for these spans
Assumptions
- Partial factors ζγG = 1,25 en γQ = 1,5 (consequence class CC2)
- Load area dimensions 50 mm × 50 mm
- Concrete strength class C20/C25