What does crane duty class A3 to A8 mean?

<p>Crane duty class (A3–A8) defines the working intensity and load spectrum of a crane, per Chinese GB/T 3811 and ISO standards. A3 (light) suits occasional use with low loads, e.g., maintenance. A5–A6 (medium) fit general manufacturing and warehouses. A7–A8 (heavy/very heavy) are for continuous, high-frequency operations like steel mills, ports, or metallurgy.</p><p>At Chunhua Crane Export, we match duty class to your exact application. Our overhead cranes (LD, LH, QD, YZ) and gantry cranes (MH, MG, RMG) cover A3–A8, with capacities 0.5T–150T. For example, YZ metallurgical cranes are rated A7–A8 for molten metal handling. We provide certified designs (CE/CCC/EAC) and a 12-month warranty.</p><p>Need help selecting the right duty class? Contact us on WhatsApp +86 19392777259 for a 4-hour quote.</p>