About product usage
Key rules for transport, loading/unloading and storage of coated steel
Following these rules preserves the quality of TMZ galvanized and polymer-coated steel at every stage — from loading and transport to stacking, storage and processing.
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7 groups of usage rules
A step-by-step guide to handling coated steel.
Loading and unloading rules
Care during operations
Loading and unloading must be carried out using specialized clamps or other lifting devices with a load capacity not lower than the coil mass, which protect coils from mechanical damage.
Prohibited
Do not use steel ropes, chains or hooks — they damage the product surface.
Do not drag or roll coils when transporting them to the storage area.
Transport rules
By road
Use specially equipped pallets, strapping and fastening elements to securely fix the load. Observe the load capacity and permissible axle load to avoid damage. The truck body must be clean, free of debris, sharp and protruding objects.
By rail
Metal products are transported in covered and open wagons in accordance with GOST 22235. Ensure the products are securely fastened in the wagons.
General recommendations
Use reliable strapping and fastening elements. Carefully monitor correct stacking and even distribution of the load weight.
Remember!
Transporting coil steel on an unequipped vehicle or in an uncleaned body with protruding elements may damage the coils and protective packaging, reducing product quality and increasing risks.
Stacking rules
Stacking in two or more tiers
It is not recommended to store coils in two or more tiers.
Storage location requirements
Stacking and storing coils on the floor is not allowed. Warehouse floors must be concreted or covered with decking. The storage surface must be free of bumps or foreign objects.
Space between coils
There must be free space between coils to ease loading and unloading.
Storage rules
Storage conditions
Galvanized and polymer-coated steel must be stored in enclosed premises, in dry conditions protected from moisture. This prevents moisture ingress, which can cause corrosion and other coating damage. Storage must be on pallets and racks located at least 100 mm above floor level — this prevents contact with floor contaminants and ensures reliable ventilation. Pallets must have supporting elements made of rubber, wood or felt in the coil contact zone, protecting against mechanical damage and deformation.
Preventing deformations and defects
Debris, surface unevenness or foreign objects at the storage site can deform the product and cause surface defects — scratches, dents and damage to the protective coating.
Protection from external factors
Steel must be protected from direct sunlight. The temperature regime must be observed. Sharp temperature fluctuations can damage the material, so they should be excluded.
Forbidden!
Washing steel in coils or products in packaging is not allowed, as water ingress can cause corrosion, coating damage and deterioration of the metal's appearance.
Storage period recommendations
It is recommended to process the steel within 3 months of the manufacturer's shipment date. The maximum storage period before processing must not exceed 6 months from the shipment date, provided all transport and storage rules are observed.
Processing rules
Temperature conditions
Processing must be carried out at a temperature no lower than +15 °C so that coatings remain flexible and amenable to deformation. If the temperature in the warehouse is below +15 °C, coils, sheets and blanks must be moved to a place with a temperature of 15–20 °C at least 24 hours before processing begins.
Forbidden operations
Welding, angle grinder work with an abrasive disc and other similar operations are not allowed — not only near the storage area, but also during processing and installation of polymer- and zinc-coated steel.
Sealants
Do not use acid-based sealants when installing products made of galvanized and polymer-coated steel. Choose only pH-neutral silicone sealants!
Corrosion prevention in mechanical joints
Bolted and riveted joints
When using bolted or riveted joints, it is important to install insulating washers between the bolts (or rivets) and the metal surfaces.
Corrosion resistance of elements
All mechanical joint elements, such as bolts, nuts, washers, screws and self-tapping screws, must be made of corrosion-resistant materials or have a protective coating — for example, zinc-coated fasteners with a painted head.
Zinc coating
Zinc coating is effective protection for steel elements.
Buyer actions upon detecting defects
Found a defect?
To learn the necessary steps if product defects are found, scan the QR code on the poster or contact the claims department.
Important
Providing the most comprehensive and accurate information, as well as attaching photos of defects, factory markings and tags, will speed up the review of your claim and avoid additional correspondence to clarify certain aspects.
Still have questions?
Download the poster with the rules or contact the relevant department.
Full poster with the rules
For a more detailed look at all usage rules, download the high-resolution poster.
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