Grid tee for suspension ceilings or the like
US4206578A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1978 |
| Grant date | Jun 10, 1980 |
| Priority date | — |
| Expiry date | Jul 31, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04B2009/062
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A structure of a grid tee member for suspension ceilings, and a method for producing such structure is disclosed. Such grid tee provides a web, a bulb at one web extremity and a flange at the other web extremity. The tee section includes three strips of material in which the first strip is relatively thin and is shaped to provide the web, a portion of the bulb and a portion of the flanges. A separate cap strip is secured to the flanges on the side thereof remote from the web and separate stiffening material having a generally U-shaped cross section is located within the bulb with the base of the U located at the extremity of the section. The three strips provide a structure in which material is concentrated at the extremities and is therefore efficiently placed to provide a high moment of inertia and high rigidity to the total structure. The thickness of the three strips is separately selected so that the material forming the section efficiently functions to provide a cross section in which the centroid is substantially midway between the extremities. The illustrated structure is produced by a method in which the stiffener strip and the strip forming the main structure of the secti…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.