Concrete forming structures
US4144690A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1977 |
| Grant date | Mar 20, 1979 |
| Priority date | — |
| Expiry date | Dec 19, 1997 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G2011/505
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Concrete forming structures are provided particularly for use as horizontal floor forms or vertical wall forms. All such forms have a plurality of beam members placed across and secured to additional structural members such as trusses or stiffeners. Each beam is usually formed of extruded aluminum, and has an upper portion which has an open section in which an independent beam stiffening joist member may be secured. Sheeting, such as plywood panels which are usually used for concrete forming, may be nailed or screwed to a concrete forming structure at the independent beam stiffening joist members, which are usually wood. The deflection resistance of a beam having a wooden beam stiffening joist member secured in its upper portion is improved over that of a standard I-beam having an equal cross-sectional area of the same metal. Any of the concrete forming structures may be removed from the concrete when it has sufficiently cured, and "flown" using known construction cranes to another working position which may be several storeys above the floor from which it has just been removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.