Nested Roll-Formed Structural Member for Higher Load Strength
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Solution Overview
Problem
Traditional roll-formed structural members often lack the necessary strength to handle larger loads, requiring multiple profiles to meet diverse structural demands, which can complicate building applications.
Innovation Solution
An elongate roll-formed structural member is designed with a pair of nested C-shaped channel elements forming a rectangular cross-section, featuring recessed regions for external reinforcing elements, which enhance strength and flexibility by increasing wall thickness and allowing for better load distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional simple roll-formed structural members are used, then they are lightweight and easy to manufacture, but they lack the necessary strength to handle larger loads
Solution Approach 1:
The patent applies nesting by placing one C-shaped channel element inside another C-shaped channel element, creating a nested configuration where the inner element is positioned within the hollow cross-section of the outer element. This nested structure increases the moment of inertia and section modulus, thereby enhancing strength and load-bearing capacity while maintaining a relatively compact and simple overall form.
Solution Approach 2:
The patent employs composite structural design by combining two separate C-shaped channel elements into a single integrated assembly. The composite structure leverages the geometric properties of both elements working together, creating a unified structural member with superior strength characteristics compared to individual elements, effectively treating the assembly as a composite structural system.
2Adaptability or versatility
If multiple profiles are used to meet diverse structural demands, then strength requirements are satisfied, but the building application becomes complicated
Solution Approach 1:
The nested C-shaped channel element structure serves multiple functions: it provides enhanced strength for heavy loads, maintains a compact form factor for easy handling and installation, offers a hollow cross-section for potential insulation or conduit integration, and creates a standardized profile that can be used across various building applications. This multi-functionality reduces the need for multiple specialized profiles.
Solution Approach 2:
The patent enables adaptability through dynamic configuration options where the nested elements can be arranged in different orientations (e.g., flanges facing same direction or opposite directions) and can accommodate various reinforcing element placements. This dynamic adaptability allows a single basic profile type to serve multiple structural requirements without needing entirely different profiles.
3Strength
If wall thickness is increased to improve strength, then load-bearing capacity increases, but weight and manufacturing complexity increase
Solution Approach 1:
The patent increases strength not by thickening walls in the traditional sense, but by adding a dimensional layer through nesting - placing one element within another. This creates additional structural depth and material distribution without simply increasing the wall thickness of a single element, thereby improving load-bearing capacity while controlling weight through efficient material placement in three-dimensional space.
Data Source
AI summary
An elongate roll-formed structural member comprising a pair of generally C-shaped channel elements nested together, the pair of generally C-shaped channel elements forming a body having a substantially rectangular cross-section profile. The body comprising first and second flanges and first and second web portions separating the first and second flanges. The first and second web portions at one or both of the top and/or bottom of the body narrow towards each other and defines a recessed region, adapted for optionally receiving forcing members.