Polymer Construction Studs with Hollow Reinforcement for Fastener Retention
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Solution Overview
Problem
Existing building materials, such as wood and plastic composites, face challenges including high cost, difficulty in cutting and shaping, susceptibility to environmental damage, warpage, and inadequate fastener adherence, while also posing health risks and recycling difficulties.
Innovation Solution
A homogenous plastic building construction stud with longitudinally extensive void spaces and internal fastener anchoring and reinforcing members, enhancing stiffness, strength, and fastener engagement, and allowing for easy cutting, recycling, and reduced material use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solid polymer wood composite (PWC) is used to replace wood, then water, fungi, and insect resistance is improved, but weight increases and cost increases
Solution Approach 1:
The solid PWC material is segmented into hollow structural members with internal void spaces, reducing overall weight while maintaining protective properties. The hollow construction divides the solid material into manageable sections with air spaces, achieving weight reduction without sacrificing the water and insect resistance inherent to the polymer composite material.
Solution Approach 2:
The invention utilizes hollow structural members with internal void spaces, creating a porous or cavity-containing structure. This porous design reduces material density and weight while the polymer composite walls maintain their protective barriers against water, fungi, and insects, effectively combining weight reduction with sustained protection.
2Strength
If glass fiber filler is incorporated into plastic lumber to improve strength and reduce warpage, then structural integrity is improved, but equipment wear increases and worker health risks increase
Solution Approach 1:
The invention changes the material composition parameters by eliminating glass fiber filler from the plastic lumber formulation. Instead, it relies on the inherent strength properties of the polymer composite material itself and the structural design of hollow members to achieve required structural integrity, thereby avoiding the harmful effects of glass fiber dust on equipment and worker health.
Solution Approach 2:
The invention uses a composite structure combining hollow plastic lumber members with internal webbing or cross-bracing elements. This composite design achieves structural integrity through geometric configuration and material composition rather than abrasive fillers, eliminating the need for glass fiber while maintaining strength requirements.
3Reliability
If plastic lumber is used to replace wood, then environmental resistance is improved, but fastener adherence deteriorates
Solution Approach 1:
The invention applies local quality enhancement by incorporating internal webbing, cross-bracing, or reinforcement elements within the hollow structural members. These localized internal features provide anchoring points for fasteners, improving fastener adherence at critical locations while the overall hollow structure maintains environmental resistance properties of the polymer composite material.
Solution Approach 2:
The invention creates a composite structural system where hollow plastic lumber members are combined with internal reinforcing elements such as webbing or cross-bracing. This composite construction provides both environmental resistance from the polymer composite material and improved fastener adherence through the internal structural features that offer mechanical anchoring.
4Weight of moving object
If hollow structural members with internal void spaces are used, then weight is reduced and material cost is reduced, but structural strength may deteriorate
Solution Approach 1:
The hollow structural members are segmented with internal webbing, cross-bracing, or partition elements that divide the internal void space. This segmentation maintains the weight reduction benefits of hollow construction while the internal structural divisions provide reinforcement and prevent buckling, thereby preserving structural strength despite the reduced material volume.
Solution Approach 2:
The invention utilizes thin-walled hollow structural members where the wall thickness and internal geometry are optimized to provide sufficient strength. The hollow configuration with internal webbing creates a structurally efficient design where the thin walls and internal supports work together to resist loads, achieving weight reduction without compromising structural integrity.
Data Source
AI summary
A building construction stud and sheathing panel are affixed together by at least one fastener. A stud end cap terminates the stud. The stud has an outer wall that defines a pair of plastic sheathing faces and first and second side walls, and at least one longitudinally extensive void space. At least one fastener anchoring and structurally reinforcing member is contained substantially within the interior of the stud outer wall. In some embodiments, the fastener anchoring and structurally reinforcing member comprises a plurality of longitudinally extensive stud wall ribs protruding internally from the first sheathing face. In other embodiments, cell dividers are provided that are parallel with and spaced slightly from the first and second sheathing faces. In yet other embodiments, internal reinforcing members define an “X”-geometry within the cells. These fastener anchoring and structurally reinforcing members are configured to increase stiffness and strength, and also enhance fastener engagement.