CLT and CFS Connector with Spring-Loaded Fasteners
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Solution Overview
Problem
The existing methods for connecting cross-laminated timber (CLT) panels to cold formed steel (CFS) studs are heavy, costly, and labor-intensive, requiring large steel panels and complex installation processes.
Innovation Solution
A CLT and CFS connector system comprising a track, fasteners, and springs that connect CFS studs to CLT panels, allowing for efficient load transfer and accommodating movements such as shrinkage and creep.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If large steel panels are used to connect CLT panels to CFS studs, then connection strength is improved, but weight and cost increase
Solution Approach 1:
The connector system divides the connection function into separate components: a CFS track attached to the CLT panel and individual CFS studs attached to the track. This segmentation eliminates the need for a large continuous steel panel while maintaining connection strength through distributed fastening points.
Solution Approach 2:
The invention changes the connection parameters by using thin-walled CFS sections with specific gauge thicknesses (e.g., 25 gauge track, 27 gauge studs) and optimizing fastener spacing. This allows adequate connection strength with significantly reduced material quantity compared to traditional heavy steel panels.
2Stability of the object's composition
If traditional steel panel connection method is used, then structural integrity is improved, but labor intensity and installation complexity increase
Solution Approach 1:
The connection system is segmented into pre-fabricated components (track and studs) that can be independently manufactured and then quickly assembled on-site. This reduces installation complexity compared to installing large steel panels with multiple attachment points.
Solution Approach 2:
The CFS track is pre-attached to the CLT panel in the fabrication shop before shipping to the construction site. This preliminary action reduces on-site labor by eliminating the need for workers to attach the track to each panel during installation.
3Strength
If concrete building methods are used, then structural strength is improved, but foundation requirements and lateral system robustness increase
Solution Approach 1:
The invention uses a composite construction approach combining CLT panels with thin-walled CFS components. This composite system achieves adequate structural strength through the combined properties of wood and steel, eliminating the need for heavy concrete while reducing overall building weight.
4Adaptability or versatility
If concrete decks are fabricated on site, then adaptability is improved, but installation time and labor crew size increase
Solution Approach 1:
The CFS track is pre-attached to the CLT panel in the fabrication shop, allowing panels to be prepared in advance and shipped to the site ready for installation. This reduces on-site fabrication time while maintaining the ability to adapt to different project requirements through custom track configurations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The connector system enables lighter, more cost-effective building structures with reduced labor requirements, allowing for single-step on-site installation and compliance with evolving structural code changes.
Implementation Method 1
The at least one spring is configured to receive the shaft of the fastener and compress between the head of the fastener and the track
Data Source
AI summary
A cross-laminated timber (CLT) and cold formed steel (CFS) connector and system is provided. The CLT and CFS connector comprises a track, at least one fastener, and at least one spring. The track is configured to connect to at least one CFS stud. The at least one fastener includes a head and shaft. The at least one fastener is configured to connect the track to a CLT panel. The at least one spring is configured to receive the shaft of the fastener and compress between the head of the fastener and the track. Methods of installing the CLT and CFS connector and system are also provided.