Saint-Gobain’s Dutch gypsum-systems arm at Vianen supplies board encasement systems that bring loadbearing steel up to a required fire resistance. It is the only holder currently listed as geldig in the KOMO register under BRL 2880, Systemen voor het brandwerend bekleden van lijnvormige stalen bouwconstructies, with KOMO attest 40067/23 issued by SKH on 16 April 2023 and valid to 2028. The systems are declared against Dutch and European fire-resistance classification rather than general drylining performance.