Cold-Formed Steel Framing Member Stiffening
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Solution Overview
Problem
Thin structural framing members used in cold-formed steel framing, such as c-shaped channels with thicknesses less than 0.035 inches, face challenges during installation due to twisting and bowing, making handling difficult and causing flexing issues that complicate the installation of fasteners.
Innovation Solution
Incorporating diamond or other shaped embossments in the web portion and longitudinally extending stiffeners or offsets in the flanges to increase stiffness, which helps prevent deflection and improve handling and installation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If thin structural framing members are used, then material usage and weight are reduced, but handling difficulty and installation complexity increase due to twisting and bowing
Solution Approach 1:
The patent applies local quality by adding embossments and stiffeners at specific locations on the framing member - specifically in the web portion and flanges - rather than uniformly thickening the entire member. This localized reinforcement provides the necessary stiffness to reduce twisting and bowing during handling while maintaining the overall thin-gauge design and minimizing material usage.
Solution Approach 2:
The patent utilizes curvature by forming embossments with curved or diamond-shaped cross-sections in the web portion of the framing member. These curved embossments increase the moment of inertia and structural stiffness without adding significant material, thereby reducing twisting and bowing during installation while maintaining the thin-gauge construction.
2Quantity of substance
If thin structural framing members are used, then material usage is reduced, but installation complexity increases due to flexing during fastener installation
Solution Approach 1:
The patent applies local quality by placing stiffeners specifically in the flanges where fasteners are installed. These localized stiffeners prevent flange flexing and web rotation during fastener installation, reducing installation complexity without requiring the entire member to be thicker, thus maintaining minimal material usage.
3Ease of operation
If member thickness is increased to reduce twisting and bowing, then handling ease improves, but material usage and weight increase
Solution Approach 1:
The patent applies local quality by adding embossments and stiffeners only at critical locations (web portion and flanges) rather than increasing the thickness of the entire framing member. This selective reinforcement provides the necessary stiffness to reduce twisting and bowing during handling while minimizing additional material usage.
Solution Approach 2:
The patent utilizes curvature by forming embossments with curved or diamond-shaped cross-sections that increase structural stiffness without requiring additional material thickness. These curved features enhance the moment of inertia locally, improving handling ease while maintaining the thin-gauge design and minimizing material consumption.
4Ease of operation
If member thickness is increased to prevent flange and web flexing, then installation ease improves, but material usage increases
Solution Approach 1:
The patent applies local quality by positioning stiffeners specifically in the flanges and web portions where flexing occurs during fastener installation. This targeted reinforcement prevents flange and web flexing at critical locations without increasing the thickness of the entire member, thereby improving installation ease while minimizing material usage.
Solution Approach 2:
The patent utilizes curvature by forming embossments with curved or diamond-shaped cross-sections that locally increase structural stiffness in the web portion. These curved features prevent web flexing and contribute to reducing flange rotation during fastener installation without requiring additional material thickness, thus improving installation ease while maintaining minimal material usage.
Data Source
AI summary
A structural framing member comprises a web flanked by a pair of flanges. The flanges may extend generally perpendicularly from the side edges of the web. In some embodiments, the web may comprise a plurality of evenly-spaced embossments positioned along the centerline of the web. The embossments may be diamond shaped. The web may further comprise one or more longitudinally extending offsets that extend along the length of the web. Each flange may comprise a plurality of evenly-spaced longitudinally extending stiffeners. The longitudinally extending stiffeners may be spaced approximately ⅜″ (0.953 cm) apart from each other. In some embodiments, each flange may further comprise a free end, which is bent inwardly to form a return lip along the length of the flange. The return lip may extend generally perpendicularly from the flange and generally parallel to the web. The structural framing member may comprise a stud, track member, or other framing member.