Crane

The utility model discloses a crane which comprises a travel car and a crane span structure, wherein the crane span structure comprises two spaced main beams and end beams arranged at two ends of the main beams respectively; each main beam comprises a first upper flange, a first lower flange and first wavy webs uniformly arranged between the first upper flange and the first lower flange; each end beam comprises a second upper flange, a second lower flange and a plurality of wavy webs uniformly arranged between the second upper flange and the second lower flange; travel car running rails are arranged at the top parts of the first upper flanges; the travel car is arranged on the travel car running rails; a lifting hook of the travel car moves up and down in a space between the two main beams; the first and second wavy webs are all wavy webs. Due to the wavy webs, the shear-resistant total cross section is effective, the shear-resistant bearing capacity of the cross section is increased, the relatively thin desi