• Regular bolted joints are designed with quality 8.8 as standardo Bolts DIN 931 / DIN 933o Nord-Lock washers to be installed as well on bolt head side as on nut side.o Nuts DIN 934o Corrosion protection: Hot dip galvanized.o Galvanized bolt connections don’t need additional painting protection.o Mandatory to use the DIN 434 Square washers for UPN profiles.o Mandatory to use the DIN 435 square washers for IPN profiles.o Bolts with diameter