Lifting frame and methods of lifting prefabricated building modules
US3958824A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1975 |
| Grant date | May 25, 1976 |
| Priority date | — |
| Expiry date | Feb 20, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C1/10
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A lifting frame is provided for use in lifting elongated room-size prefabricated building modules and other large, heavy and bulky elongated loads having asymmetrical or lopsided weight distributions in the direction of elongation. The lifting frame includes a pair of generally parallel, side-by-side, spaced apart elongated beams and a pair of cross-brace beams running at right angles to the elongated beams and located therebetween. The elongated beams are adapted to be releasably fastened to the upper portion of the building module or other load with the longer dimension of such beams running in the same general direction as the longer dimension of the building module or other load. The cross-brace beams are adapted to receive and laterally position the lower ends of the cables of a cable-type lifting sling. Structure is provided for releasably fastening the cross-brace beams to the elongated beams at selected ones of a series of different longitudinal locations along the elongated beams for enabling the centerline of lift to be longitudinally aligned with the center of gravity of the building module or other load with a minimum of tipping of the module or load during the lifting …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.