constructed of sections adapted to be assembled to form jibs or various lengths

Cranes comprising essentially a beam, boom or triangular structure acting as a cantilever and mounted for translatory or swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib cranes, derricks or tower cranes > Constructional features or details > Jibs > assembled from separate sections to form jibs of various discrete lengths

Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes (base supporting structures with legs B65C5/00) > Constructional features or details (of dredgers E02F) > Jibs > constructed of sections adapted to be assembled to form jibs or various lengths