Taking this requirement for heavy loadings a step further, Zero has developed an aluminium composite filler containing aluminium oxide and silicon carbide which can be used to fill the void beneath the threshold. This gives added strength to the threshold. Ideal applications include heavy commercial traffic in warehouses, manufacturing buildings, schools, cafeterias, car dealerships, hospitals and industrial buildings. V3 full body strength is available to special order only and can be supplied with all Zero thresholds. Supplied as standard undrilled with no holes (NH).