Oensingen manufacturer of cable ducts, trays and support systems holding nine live VKF recognitions, every one in Untergruppe 703 Brandschutzkanäle (Tragsysteme). Its published work is on Funktionserhalt — keeping a safety circuit energised through a fire for its rated period, which is what a smoke-extract fan, a firefighting lift or an alarm system depends on when the compartment it passes through is burning.