Concrete Deck Insert With Extruded Female Threads
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Solution Overview
Problem
Existing concrete inserts for metal deck formed concrete lack a secure and efficient method to pre-position threaded rods, which affects the stability and rigidity of the metal deck formed concrete, particularly in applications like building ceilings where mechanical and electrical components need to be suspended.
Innovation Solution
A concrete insert comprising an elongate, planar body with rod openings and female screw threads that allow for secure threading of threaded rods, enhancing the structural integrity and stability by providing a rigid strap that resists bending, and can be easily fastened to corrugated metal decking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional tap-formed threaded opening is used in the insert strap, then the insert can be manufactured with existing tools, but the threaded rod lacks sufficient security and stability in the metal deck formed concrete
Solution Approach 1:
The patent changes the manufacturing parameter of the threaded opening from tap-formed to extrusion-formed female screw threads. This parameter change allows the threaded rod to be more securely anchored in the concrete while using standard extrusion equipment, resolving the contradiction between reliability and ease of manufacture
Solution Approach 2:
The insert strap uses a composite construction with the female screw thread extruded into the strap body, creating a integrated structure that combines the strap material with the threaded feature. This composite approach enhances the security of the threaded rod while maintaining manufacturing simplicity
2Ease of operation
If the insert strap is made flexible to ease installation, then the insert can be easily fastened to metal decking, but the insert loses rigidity and bending resistance
Solution Approach 1:
The patent adds dimensional features to the otherwise flat insert strap by extruding female screw threads that protrude above and below the strap surfaces. This dimensional change creates structural reinforcement that provides bending resistance while maintaining the overall flexibility needed for installation
3Adaptability or versatility
If a single threaded opening is provided in the insert, then the manufacturing process is simplified, but the versatility of the insert is limited
Solution Approach 1:
The extrusion process used to create the female screw threads is inherently capable of producing multiple threaded openings in a single manufacturing operation. This universal manufacturing approach allows the insert to accommodate multiple threaded rod positions without significantly increasing structural complexity, thereby enhancing versatility
Data Source
AI summary
A concrete insert for metal deck formed concrete includes an elongate, generally planar body having opposite upper and lower faces, and opposite first and second longitudinal ends. A rod opening is located between the first and second longitudinal ends and extends through the upper and lower faces of the elongate, generally planar body. A female screw thread extends at least partially about a perimeter of the rod opening and protrudes at least one of above the upper face and below the lower face. The female screw thread is configured to threadably mate with a male thread of a threaded rod.