Interlocking cross tee
US4912894A · kind A · utility
31Cited by
5References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 4, 1989 |
| Grant date | Apr 3, 1990 |
| Priority date | — |
| Expiry date | May 4, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04B9/122
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A fire-resistant suspended ceiling grid structure having cross tees interlocked to main beams, to support ceiling tiles. The structure has shear means to permit a cross tee to expand into a main beam during a fire. The interlock includes tongues held in an abutting relationship by open belt loops. The tongues slide to permit the cross tees to expand longitudinally during a fire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.