Perforated steel sheets Perforated steel sheets are used for ventilation and light transmission, mainly in agricultural buildings such as livestock stables. Perforated sheets can also be used for acoustical absorption. Borga’s perforated sheets have good strength-to-weight ratio. Pattern R3T5 Hole type Round Hole diameter 4 mm Triangular pitch 7 mm Open area 29.6% Color variation Standard Colors Cherry Red 3009 White 9106
