These products, which are used as support molds in vertical chimneys opened for different purposes, are manufactured using quality manufacturing steels in line with static values. These products, which are used in drainage systems and water discharges, are also offered to our customers as hot-dip galvanized in order to preserve their strength for many years. The production of buttress boxes in tunnels to prevent collapses on horizontal floors is produced from hea, ipe, npi, heb or hem products of different derivatives according to the structure of the earths crust.