Metallurgy double girder semi-gantry crane is used primarily for lifting of melting metal metallurgy, Foundry site, metallurgy of hoisting mechanism supporting the standard car, rated capacity 10 tons and below. Level, to A7. In the lower part of the main beam, a leg and insulation on the lower beam. Crane design and manufacture meet the State administration of quality supervision, inspection and quarantine of the quality of writing "2007" document No. 375, lifting other molten metal items and lifting hot solid metal location can also refer to the selection.