FIELD: transport.
SUBSTANCE: invention relates to crane section. Crane section has lengthwise axis and hidden outline line extending in transverse section approximately in mirror symmetry about mirror axis s. Note here that outline line crosses the mirror axis first point of intersection S1 and second point S2. Outline line has straight length with hidden extension thereof in direction of second intersection point S2 crosses mirror axis s to make an acute angle therewith. Center of gravity F confined by outline line in area cross-section plane is located between said first intersection point S1 and mid point M located at mirror axis s at equal distance from first and second points S1, S2.
EFFECT: perfected crane section.
30 cl, 12 dwg
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