AQ-LD single girder 15 ton overhead crane parameters: Span: 7.5-31.5m. Lifting height: 6-30m. Lifting speed: 0.3-8m/min. Hoist running speed: 20m/min. Crane running speed: 20m/min. Work duty: A3, A4. AQ-QD double girder overhead crane: this crane is widely used in factories, warehouses, and other indoor workshops for heavier-duty applications