FIELD: machine building.
SUBSTANCE: invention relates to lifting cranes. Crane has at least one horizontal lattice span beam having plurality of cross braces in form of plates, which connect upper horizontal belt with lower horizontal belt. Span beam bears load trolley with hoisting facilities to move said trolley along mentioned span beam. Upper and lower belts of span beam are interconnected by multiple struts and posts, made in form of plates with main surface arranged across length of span beam. On upper and lower ends of each brace strut is at least one groove on main surface, through which span beam lower belt or upper belt pass with abutment to edges of main surface, to which said struts and posts are welded.
EFFECT: simplified span beam manufacture with simultaneous increase of its strength at longitudinal bend.
70 cl, 6 dwg
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