Prefabricated fireproof steel and concrete beam
US4571913A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1984 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Apr 24, 2004 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04C3/293
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A composite structural element has a main steel beam having a web and at least two flanges extending therefrom, having oppositely directed outer faces, having outer edges generally defining a plane and defining with the web a recess open away from the web between the outer edges. A mass of concrete fills the recess substantially to the plane, the outer flange faces being exposed and substantially free of concrete. Another profiled steel beam is fixed to the web of the main beam and wholly imbedded in and covered by the concrete mass. Typically the main beam is an H- or I-beam and has two such channels provided with such other beams and filled with respective such masses. The other beams can be of T-section or each other beam can be an I- or H-beam. In addition it is possible to provide longitudinally extending steel reinforcing bars imbedded in the concrete mass. Steel fibers can also be imbedded as reinforcement in the concrete mass, and this mass can be at least partially of colloid concrete.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.