Polymer Construction Stud Structure for Fastener Grip and Stiffness
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Solution Overview
Problem
Existing building materials, such as wood and plastic composites, face challenges including high cost, susceptibility to environmental damage, warpage, difficulty in cutting and fastening, and recyclability issues, while plastic lumber products struggle with material expense, fabrication difficulties, and hazardous glass fiber fillers.
Innovation Solution
A homogenous plastic building construction stud with void spaces and internal reinforcing members, designed for easy cutting and fastening, enhanced strength, and recyclability, featuring a plastic outer wall with internal voids and reinforcing structures to secure fasteners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wood is used for construction, then it is easily cut and fastened, but it is susceptible to environmental damage and warpage
Solution Approach 1:
The patent uses a composite structure combining plastic material with fibrous reinforcement (cellulose, wood flour, or natural fibers) to create a material that maintains wood-like workability while gaining environmental resistance. The fibrous reinforcement provides structural integrity and resistance to warpage, while the plastic matrix provides moisture and insect resistance.
2Reliability
If polymer wood composite is used, then water and insect resistance is improved, but the product becomes very heavy and expensive
Solution Approach 1:
The patent incorporates void spaces and hollow cavities within the composite structure to reduce overall density and weight while maintaining local structural integrity. The fibrous reinforcement is strategically distributed to provide strength where needed, allowing weight reduction without compromising load-bearing capacity.
3Reliability
If plastic lumber is used, then environmental resistance is improved, but fabrication and fastening become difficult
Solution Approach 1:
The patent creates a composite material where fibrous reinforcement (cellulose, wood flour, or natural fibers) is embedded in a plastic matrix. This combination maintains the environmental resistance of plastic while the fibrous components provide wood-like characteristics for easy cutting, shaping, and fastening using conventional tools.
4Strength
If glass fiber filler is incorporated in plastic, then strength and fastener adherence are improved, but equipment wear increases and recycling becomes difficult
Solution Approach 1:
The patent changes the type of fibrous reinforcement from glass fiber to natural fibers (cellulose, wood flour, or plant-based fibers). This parameter change maintains the structural strength and fastener adherence benefits of fibrous reinforcement while eliminating the abrasiveness of glass fiber that causes equipment wear and recycling difficulties.
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.