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
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