Knauf Fireboard are screwed onto a metal substructure made of self-supporting support profiles made of double profiles CW or UA with additional cover strips. The attachment of the support profiles takes place exclusively on the flanking walls. A top cover made of Firebord is required for fire protection. Between the support profiles (on the planking) an effective fire and sound insulation layer is applied. Depending on the system variant selected, room widths (spans) of up to 4.35 m are possible.