Joist
US4015396A · kind A · utility
11Cited by
9References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1975 |
| Grant date | Apr 5, 1977 |
| Priority date | — |
| Expiry date | Jun 3, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49625
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A steel joist having an upper chord, a web, and a lower chord; the upper chord consisting of an S shaped cross section elongated member having in one form a lower reverse flange at the base of the S, the flange being connected to the web so that the center of gravity of the joist is in the region of its central axis, the region between the base of the S and the reverse flange including an inclined step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.