Backing Strip Finishing Accessory for Fire-Rated Acoustic Joints

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Solution Overview

Problem

Existing building construction methods lack a single component that effectively provides fire protection and sound insulation at the joints of sheathing assemblies, such as the joint between a wall and a ceiling, while also allowing for vertical movement of studs and wallboard panels due to thermal expansion or seismic activity.

Innovation Solution

A finishing accessory with a backing strip that includes a bead and a compressible or resilient material to fill the gap between the wallboard panel and the horizontal support structure, providing fire resistance and sound insulation, and allowing for vertical movement of the wallboard panel.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple separate components (fire resistant material, sound insulation material, finishing accessory) are used to provide fire protection and sound insulation at joints, then the desired level of fire protection and sound insulation is achieved, but installation time and material cost increase

Engineering Contradiction:

Improvefire protection and sound insulation performanceVSAvoidinstallation time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent combines multiple separate components (fire resistant material, sound insulation material, and finishing accessory) into a single integrated finishing accessory with a backing strip. This backing strip includes fire resistant and sound insulation materials embedded within it, allowing one component to perform the functions previously requiring multiple separate materials and components, thereby reducing installation time while maintaining fire protection and sound insulation performance

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The finishing accessory with the backing strip is designed to perform multiple functions simultaneously: providing fire protection, sound insulation, and aesthetic finishing at the joint between wallboard panels and ceilings. This multi-functional design eliminates the need for separate fire resistant strips, sound insulation materials, and finishing accessories, directly addressing the contradiction by reducing installation time without compromising any single performance requirement

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If multiple separate components are used to provide fire protection and sound insulation, then the desired level of fire protection and sound insulation is achieved, but total material cost increases

Engineering Contradiction:

Improvefire protection and sound insulation performanceVSAvoidmaterial cost

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The backing strip is constructed as a composite material structure that integrates fire resistant materials and sound insulation materials within a single component. This composite construction allows the material itself to provide multiple functions (fire protection, sound insulation, and structural support) simultaneously, reducing the total quantity of materials needed and lowering overall material cost while maintaining the desired protection levels

Inventive Principle:

Principle #40Composite materials

3Shape

If a finishing accessory is installed at the top of the wallboard panel, then an aesthetically pleasing appearance is provided, but the accessory may not accommodate vertical movement of the wallboard panel during thermal expansion or seismic activity

Engineering Contradiction:

Improveaesthetic appearanceVSAvoidaccommodation of vertical movement

Core Design Contradiction:

ShapeVSAdaptability or versatility

Solution Approach 1:

The backing strip is designed with flexible, compressible materials that can deform and adapt to vertical movements of the wallboard panel. The flexible nature of the backing strip allows it to accommodate thermal expansion and seismic deflection while maintaining its position and providing continuous fire protection and sound insulation, resolving the contradiction between aesthetic appearance and adaptability to movement

Inventive Principle:

Principle #30Flexible shells and thin films

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 finishing accessory reduces installation time and material costs by combining multiple functions into a single component, enhancing fire protection and sound insulation while accommodating vertical deflections.

Implementation Method 1

a compressible or resilient material to fill the gap between the wallboard panel and the horizontal support structure

Methodology Applied

Scientific EffectCompressibility: Compression

Implementation Method 2

a compressible or resilient material to fill the gap between the wallboard panel and the horizontal support structure, providing fire resistance and sound insulation, and allowing for vertical movement of the wallboard panel

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 3

providing fire resistance and sound insulation

Methodology Applied

Scientific EffectFire resistance: Thermal Insulation

Implementation Method 4

providing fire resistance and sound insulation

Methodology Applied

Scientific EffectSound insulation: Acoustic Absorption

Data Source

PatentUS12486676B2Finishing accessory with backing strip

Publication Date: 2025.12.02 CLARKWESTERN DIETRICH BUILDING SYSTEMS LLC

AI summary

A framing accessory includes a bead and a backing strip. The bead may comprise a first leg, a second leg, and a lip. The second leg may comprise a plurality of openings. The strip may be attached to the upper surface of the first leg. In some embodiments, the strip may comprise a single layer of material, while in other embodiments, the strip may comprise two or more layers of material. The strip may comprise material having fire resistant, intumescent, and/or sound insulating properties. The finishing accessory may be configured to be installed in a gap of a wall assembly to create a seal.