1 - floor with a minimum thickness of 150 mm
2 - cable tray
3 - cables with a diameter of max. 21 mm
4 - fireproof Flame Cabel Coating; on both sides of the floor,
  length L = min. 300 mm, depth k = min. 30 mm,
  thickness g2 = min. 1.2 mm
5 - Flame Cabel Coating, on both sides of the floor,
   dimensions: f = min. 50 mm, e = min. 50 mm, g1 = min. 0.6 mm
6 - mineral wool, density 50 kg / m3, thickness w = max. 40 mm