Necked-Down Truss Member for Hybrid Orientation Transition
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Solution Overview
Problem
Existing truss building technologies face limitations in efficiently transitioning between different lumber orientations, such as 2× and 4× configurations, within a single truss framework, which restricts the ability to achieve optimal strength, stiffness, and economy, and often require separate pressing and assembly of truss members.
Innovation Solution
The introduction of a fundamental component with a necked-down portion that allows truss members to transition between different orientations, enabling the use of metal plates for connections between members of varying dimensions, facilitating the creation of hybrid truss configurations that combine vertical and horizontal orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional truss members with uniform dimensions are used, then the manufacturing process is simple, but the ability to transition between different lumber orientations (2× and 4× configurations) is limited, restricting optimal strength and stiffness
Solution Approach 1:
The truss member is segmented into distinct portions with different cross-sectional dimensions. The first portion has dimensions suitable for 2× configuration while the second portion has dimensions for 4× configuration, allowing the member to adapt to different orientation requirements along its length.
Solution Approach 2:
Different portions of the same truss member are given different local qualities in terms of cross-sectional dimensions. This allows each portion to be optimized for its specific functional requirement, with the first portion optimized for one orientation and the second portion for another orientation.
2Productivity
If separate pressing and assembly of truss members is required, then the manufacturing process becomes complex and time-consuming, but using uniform members simplifies the connection process
Solution Approach 1:
Multiple truss members with different orientations are merged into a single integrated component. The first and second portions are formed as one continuous member, eliminating the need for separate pressing and assembly operations while maintaining the benefits of different orientations.
Solution Approach 2:
The single truss member performs multiple functions by incorporating different cross-sectional dimensions along its length. It can serve both 2× and 4× configuration requirements within one component, reducing the number of separate parts needed and simplifying assembly.
3Adaptability or versatility
If all truss members have the same width, then connector plate connections are straightforward, but transitioning between 2× and 4× configurations requires different connection methods
Solution Approach 1:
The cross-sectional dimension parameter of the truss member is changed along its length. The first portion has one set of dimensions while the second portion has different dimensions, allowing the member to adapt to different configuration requirements while maintaining consistent connection methodology.
Data Source
AI summary
A truss for incorporation into a building structure includes a fundamental component with at least one necked-down portion which changes the width or depth of the component. The fundamental component can be employed in joists, heels, and/or other joints for a roof truss.