Lattice mast crane, has lattice mast arm including two strands of lattice pieces connected in portion and joint connections whose rotational axes are arranged parallel to each other, where lattice pieces are connected with each other

摘要

The crane has two lattice pieces (10, 20) releasably connected with each another. A lattice mast arm comprises two strands (11a, 11b) of lattice pieces connected in a portion, and joint connections whose rotational axes run parallel to each other and perpendicular to a rocker axle (6) and/or longitudinal axis of the arm. The strands are connected with lower and upper cross members (4, 5). The joint connections are provided in a region of the upper cross member while a connection in a region of the lower cross member is rigidly constructed.