FIELD: heavy-duty hoisting equipment. SUBSTANCE: crane understructure with channeled V-shaped upper chord is reinforced by two arches. One of these arches is made of two quarters of pipe with flanged ends. On one side the pipe quarters are connected with rail web and on the other side with the channeled chord. The second arch is internal in relation to the first one and is made of half of pipe. It is engageable with the outer arch via rail base and the ends of the arch thrust against chord flanges through brake beam. EFFECT: improved reliability. 2 cl, 1 dwg
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Authors
Dates
1997-12-20—Published
1995-03-14—Filed