| 1 | Match the steel grade to the intended load | Commercial low-carbon steel, such as ASTM A1008 CS Type B or equivalent | Powder coating or baked enamel for general indoor use | 75–150 kg | Offices, archives, retail back rooms | Request the yield strength, sheet thickness, shelf span, and tested working load rather than relying only on the steel grade. |
| 2 | Use thicker steel for heavy or concentrated loads | Structural or higher-strength low-carbon steel, commonly specified by mechanical properties | Powder coating with a corrosion-resistant pretreatment | 250–500 kg | Warehouses, workshops, spare-parts storage | Check thickness at the shelf panel, beam, upright, and connector; the thinnest component can govern capacity. |
| 3 | Choose galvanised steel for humid locations | Low-carbon steel with a zinc coating; continuous or hot-dip galvanising may be used | Zinc coating, optionally combined with a topcoat | 100–300 kg | Garages, covered loading areas, humid warehouses | Confirm zinc coating type, coating mass or thickness, cut-edge protection, and whether indoor ventilation is adequate. |
| 4 | Select stainless steel for frequent moisture exposure | AISI 304 for general wet service; AISI 316 for chloride-rich or coastal conditions | Mill finish, brushed finish, or electropolished surface | 100–250 kg | Food preparation, laboratories, coastal facilities | Verify the stainless grade, surface finish, weld quality, passivation, and resistance requirements for chemicals or salt. |
| 5 | Compare powder coating with liquid paint | Low-carbon steel or galvanised steel substrate | Powder coating generally provides a more uniform, durable film than basic liquid paint | 75–300 kg | Dry indoor and moderately demanding commercial areas | Ask for coating thickness, pretreatment method, adhesion performance, impact resistance, and color standard. |
| 6 | Separate static load from mobile load | Low-carbon steel or higher-strength steel, depending on design | Powder coating or galvanising according to the environment | 50–200 kg on mobile units | Picking areas, offices, medical and maintenance rooms | Confirm whether the rating applies to stationary use, rolling use, evenly distributed loads, or point loads. |
| 7 | Account for shelf-span deflection | Low-carbon steel with formed edges, reinforcing ribs, or structural beams | Powder coating or zinc coating | 150–400 kg | Long-span storage and carton shelving | Request the allowable deflection limit, shelf span, support spacing, and test method; capacity alone does not indicate stiffness. |
| 8 | Check seismic and anchoring requirements | Structural-grade steel selected according to local design requirements | Powder coating, galvanising, or a duplex system | 200–500 kg | High-bay storage and earthquake-prone regions | Verify floor anchors, bracing, upright stability, anti-tip devices, and compliance with the destination country’s building rules. |
| 9 | Evaluate fire and temperature conditions | Uncoated or coated low-carbon steel; special designs may require high-temperature protection | Standard powder coating is not a fireproof coating; use an approved system where required | 100–300 kg | Industrial rooms and temperature-controlled facilities | Confirm operating temperature, fire separation rules, sprinkler clearance, and whether the coating releases restricted substances when heated. |
| 10 | Confirm testing, labeling, and documentation | Grade and specification should be traceable to the supplied material | Coating system should be documented by batch or production record | Design-specific | All international procurement projects | Request material certificates, load-test reports, assembly instructions, inspection records, packaging details, and country-specific compliance documents. |