Triangulation of a lattice girder, in particular of a jib element for a tower crane
US6871469B2 · kind B2 · utility
2Cited by
19References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2003 |
| Grant date | Mar 29, 2005 |
| Priority date | — |
| Expiry date | Mar 19, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04C2003/0495
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
For a lateral face of the lattice girder, defined by an upper chord and a lower chord, the triangulation comprises compression bars substantially perpendicular to the chords, oblique tension bars of smaller length connecting the top of a compression bar to the lower chord, and other oblique tension bars of greater length, also connecting the top of a compression bar to the lower chord, at a point located further ahead toward the base of the next compression bar. This triangulation is used, in particular, for the jib and counterjib elements of tower cranes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.