Concrete products for ventilation

Concrete products for ventilation
Betonnen afwateringsgoten

Drainage channels
  1. Concrete products
  2. Pigs
  3. Conical holes

Conical holes

Length (cm)Width (cm)Thickness (cm)
80
50
10
⬇ 5 cm
250
50
10

Intersection holes: 1,7 cm

Conical holes
Conical holes
Conical holes in concrete slat