C-Shaped Metal Stud with Ribbed Web for Sound Attenuation
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Solution Overview
Problem
Existing metal studs in sound attenuating wall systems face challenges in maintaining load carrying capacity and screw performance while effectively reducing sound transmission, especially when used with abuse resistant high density wallboard, often requiring multiple layers of wallboard or resilient channels that compromise structural integrity.
Innovation Solution
A C-shaped metal stud made of 0.0180 steel with specific chemical and mechanical properties, featuring parallel flanges, a central web with channel-shaped ribs, and an in-turned double thickness hemmed ledge, which enhances load carrying capacity and screw performance while improving sound attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If multiple layers of wallboard are used to achieve required sound attenuation, then sound transmission is reduced, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent changes the physical parameters of the metal stud by using 0.0180 inch thickness steel with 57 ksi minimum tensile strength and specific chemical composition (carbon content 0.23-0.40%, manganese 0.60-1.65%, silicon 0.03-0.17%). These parameter changes enable the stud to provide sound attenuation equivalent to multiple wallboard layers while maintaining structural integrity and reducing overall system complexity
Solution Approach 2:
The patent employs composite material properties by combining specific steel alloy composition with precisely controlled geometric dimensions (0.0180 inch thickness, C-shaped cross-section with specific flange and web dimensions). This composite approach creates a metal stud that simultaneously provides structural support and sound attenuation functions, eliminating the need for multiple wallboard layers
2Object-affected harmful factors
If resilient channels are used to reduce sound transmission, then sound attenuation is improved, but the load carrying capacity and ease of operation deteriorate
Solution Approach 1:
The patent modifies the metal stud parameters to 0.0180 inch thickness with enhanced steel properties (57 ksi minimum tensile strength, specific chemical composition) to provide inherent sound attenuation without requiring resilient channels. This allows direct attachment of wallboard while maintaining both sound attenuation and load carrying capacity
Solution Approach 2:
The patent removes the resilient channel component from the system entirely. By incorporating sound attenuation properties directly into the metal stud through specific material composition and dimensional parameters, the design eliminates the need for separate resilient channel attachments, thereby maintaining full load carrying capacity and simplifying installation
3Object-affected harmful factors
If special structures are added to the web of the stud to reduce sound transmission, then sound attenuation is improved, but the strength and load carrying capacity deteriorate
Solution Approach 1:
The patent achieves sound attenuation by changing the fundamental parameters of the entire stud (0.0180 inch thickness, 57 ksi steel, specific chemical composition) rather than adding localized web structures. This uniform parameter change provides sound attenuation across the entire stud surface without compromising structural integrity or load carrying capacity
4Object-affected harmful factors
If lighter gauge metal studs are used to reduce sound transmission, then sound attenuation is improved, but the strength and reliability deteriorate
Solution Approach 1:
The patent optimizes the steel gauge to 0.0180 inch with enhanced material properties (57 ksi minimum tensile strength, specific chemical composition) to achieve the optimal balance between sound attenuation and strength. This parameter optimization provides sound attenuation equivalent to lighter gauges while maintaining superior load carrying capacity comparable to heavier gauges
Data Source
AI summary
The present invention provides for a metal stud for use in sound attenuating wall systems utilizing high density, abuse resistant wallboard, the metal stud having specific steel chemical and mechanical properties to result in increased sound attenuation properties while maintaining the load carrying capacity and screw performance providing improved economics. The metal stud is a generally C shaped metal stud constructed of 0.0180 steel having at least 57 ksi strength having two parallel spaced apart flanges joined along the length of one edge by a central web and being provided with an in-turned double thickness hemmed ledge along the length of the second edge, the flanges having a width of greater than 1⅜ inches between the one edge and the second edge, each of the flanges being provided with a reinforcing rib centrally located in the flange extending the length of the flange. The central web has a main central section bordered by channel shaped ribs extending longitudinally of the stud outwardly of the central web, the edges connected to the edges of the flange.