Low-Profile Screen Framing System with Concealed Fasteners
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Solution Overview
Problem
Existing framing systems for screen porches are cumbersome, require complex and costly installation, and often result in an unfinished appearance due to visible fasteners and furring strips, posing safety and aesthetic challenges, especially in multi-level setups.
Innovation Solution
A simplified framing system using buttons and screws with a frame element that snaps into place, concealing fasteners and allowing for easy installation from inside the porch, with a spline groove to secure screening material, and trim boards to create a flush, aesthetically pleasing finish.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional fasteners (nails, screws) are used to attach screening to framing, then the screening can be securely fastened, but the fasteners create an unfinished appearance and require additional furring strips to conceal them
Solution Approach 1:
The frame member integrates multiple functions into a single component: it provides structural support, attaches screening through grooves and flanges, and conceals fasteners within its profile. This eliminates the need for separate furring strips and achieves a clean finished appearance while simplifying the overall construction system
Solution Approach 2:
The frame member acts as an intermediary element between the structural framing and the screening material. It provides a specialized interface with grooves and flanges that securely holds the screening while hiding the attachment fasteners, thus mediating between structural requirements and aesthetic requirements
2Reliability
If multi-level screen porches are erected with elaborate framing techniques, then the structural requirements are met, but the installation becomes more costly and time-consuming
Solution Approach 1:
The frame system is divided into modular, pre-fabricated components that can be easily assembled on-site. The standardized frame members with integrated features allow for quick installation while maintaining structural integrity, reducing both installation time and cost for multi-level porches
Solution Approach 2:
The frame members are designed as universal components that can be used throughout the entire porch structure, including multi-level configurations. This standardization eliminates the need for elaborate custom framing techniques while maintaining structural requirements, thereby improving installation productivity
3Strength
If screening is attached directly to main frame members at elevated heights, then the installation is structurally sound, but the work becomes dangerous and inconvenient
Solution Approach 1:
The frame member serves as an intermediary that provides a secure attachment system for screening while being installable from inside the porch at lower, safer heights. The integrated grooves and flanges ensure strong attachment without requiring workers to operate at dangerous elevated positions
4Strength
If asymmetric fastening devices are used to attach screening, then the attachment can be secure, but the installation requires careful orientation and may need two installers
Solution Approach 1:
The frame member incorporates asymmetric features such as the spline groove and flange configuration, but these are integrated into a symmetric overall profile. This allows the asymmetric attachment mechanism to provide secure fastening while the symmetric external appearance and standardized interface enable simple, quick installation by a single worker without concerns about orientation
Data Source
AI summary
A system for framing a porch using concealed fasteners and concealed or partially-concealed framing elements on support posts. The framing elements have a small cross section, generally shaped like the letter C with a slot on one side and a spline groove in one of the opposing corners. The framing elements are attached to a support post by screwing plural, spaced-apart buttons into the posts and then snapping the button heads into the slot of the framing elements. The framing elements may be applied to the surface of the posts or, because of their small size, may be put into grooves formed in the sides or corners of the posts and concealed on one or more sides by trim boards.