Composite joist floor system
US8621806B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 19, 2010 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | Sep 12, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B35/048
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The composite joist floor system includes joists supporting metal decking and a stand-off fasteners are spaced along the length of the joist Each fastener has an upper portion with a through hardness between HRB 70 and HRC 40 and a lower portion having a threaded portion with a through hardness of between HRB 70 and HRC 40 and a thread-forming portion adjacent the threaded portion with at least a HRC 50 hardness and failure torque to thread-forming torque of at least 3.0 and a drive torque at least 20% less than a thread-forming torque, and a fluted lead portion adjacent the thread-forming portion with a nominal diameter between 70 and 95% of major diameter of the threaded portion adapted to form a fastener opening. These stand-off fasteners extend into and are encapsulated by a cementitious slab supported by the metal decking to form a composite floor system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.