A New Standard on Thin Sheet Steel Products with Protective-Decorating Coating Has Been AdoptedOn September 21st, the National Standardization Body has adopted a new DSTU (State Standard of Ukraine) 8802:2018 "Thin sheet steel products with protective-decorating coating for construction. General technical specifications" which will come into force on January 1st, 2019.
The new standard will replace DSTU BV 2.6.9:2008, i.e. the old standard with GOST steel decks will be automatically cancelled on January 1st.
The thin sheet steel products include metal tile, steel deck, internal wall cassettes and seam roofing.
According to the basic requirements of the new standard:
- minimal product thickness is 0.45 mm (taking into account all protective layers);
- thickness tolerance - not more than 0.03 mm.
- 25 µm polyester coating for exterior use, 35 µm - matt polyester coating plus zinc 225 g/m2 or 140 g/m2 (subject to a 10 year guarantee from the roll supplier);
- for interior use, subject to the availability of an organic coating, 15 µm polyester coating plus zinc 100 g/m2.
The minimum hardness of a polymer coating - H
Metal tile, seam panels and steel decks with a height of up to 30 mm can be profiled from steel DX51D and S220-350, steel deck higher than 30 mm and internal wall cassettes - only from S250-350. Furthermore, steel decks of 30 mm and higher as well as internal wall cassettes should have the tables of geometric characteristics (load tables).
Product with a polymer coating should have a marking with the following:
- name of the manufacturer;
- product name;
- product thickness;
- steel grade;
- zinc grammage;
- polymer coating type and thickness.
ProfSteel Т-75A 0,75 S320 Z100 PE15
SuperSteel Monterrey 0,45 DX51D Z225 PE25
DSTU 8802:2018 is the only standard that regulates the requirements on the zinc coating grammage and is not contrary to the requirements of the harmonized European standards, therefore it may be considered as the standard clarifying the requirements related to DSTU EN 508-1, 14782.
The new standard has also resolved issues related to the compliance with the fire safety requirements according to the European classification - DSTU EN 13501-1:2016 (Part 1. Classification using test data from reaction to fire tests) and DSTU EN 13501-5:2016 (Part 5. Classification using data of tests of roof stability during exposure to external fire) and the Ukrainian classification on DBN В.1.1-7:2016.