Fastener Sleeve Assembly for Deflection-Controlled Wall Attachment
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Solution Overview
Problem
Existing fastener assemblies for securing non-load bearing walls to load-bearing components often result in uneven installations, leading to issues like squeaking floors, stress cracks, and load transfer to unsupported structures, due to inadequate deflection accommodation and inconsistent installation methods.
Innovation Solution
The development of fastener assemblies with removable sleeves and tapered longitudinal ribs, distal slits, and adjustable installation guides that allow for flush and offset installations, accommodating deflection and supporting various materials like wood, cold-formed steel, and concrete, while ensuring secure engagement and minimizing wall loading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If fastener assemblies are used to secure non-load bearing walls to load-bearing components, then the walls are firmly attached, but the components cannot deflect under loads causing stress cracks and structural damage
Solution Approach 1:
The fastener assembly incorporates a movable fastener that can translate axially within the sleeve, allowing the connection to dynamically adjust and accommodate deflection of the load-bearing component while maintaining secure attachment of the non-load bearing wall
Solution Approach 2:
The system changes the spacing parameter between the non-load bearing wall and the load-bearing component by allowing axial movement of the fastener, creating a gap that enables deflection while maintaining structural integrity
2Shape
If components are installed flush without spacing, then the appearance is clean and compact, but deflection causes stress cracks and load transfer to unsupported structures
Solution Approach 1:
The system controls the spacing parameter between components to create an optimal gap that accommodates deflection while maintaining a clean appearance, preventing stress cracks and unwanted load transfer
3Strength
If blocking systems are overbuilt for fastening, then secure attachment is achieved, but installation complexity and material usage increase
Solution Approach 1:
The system extracts and eliminates the need for complex blocking systems by using a specialized sleeve and movable fastener assembly that provides secure attachment directly through the joist or truss, simplifying the overall construction approach
Solution Approach 2:
The sleeve assembly serves multiple functions: it secures the non-load bearing wall, accommodates deflection, and eliminates the need for separate blocking systems, reducing overall system complexity
4Strength
If the fastener is tightly secured, then the connection is strong, but deflection is restricted causing floor creaking and noise
Solution Approach 1:
The fastener assembly incorporates a movable fastener that can translate axially within the sleeve, allowing the connection to dynamically adjust and accommodate deflection while maintaining secure attachment, thereby preventing floor creaking and noise
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
Disclosed are systems, devices and methods used in construction to secure one component, such as a header, to another component, such as a joist, while controlling spacing. Fasteners are used with a removable sleeve member having longitudinal ribs to secure the fastening assembly and prevent movement. An installation guide is provided that facilitates both flush and offset installation.