Double-lug fastener for standing seam roof ridge strips
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Solution Overview
Problem
Existing methods for attaching protective strips to standing seam metal roofs, such as pinched seams and Z sections, require specialized knowledge and are either elaborate or involve permanent, non-adjustable through-fastening, which limits flexibility and ease of installation.
Innovation Solution
A double-lug metal fastener with articulated lugs and embossings that securely attach ridge or hip strips to standing seams without piercing the roof, allowing for easy adjustment and removal, using non-piercing means like stainless steel hooks that can rotate for secure seating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional pinched seams or Z sections with through-fastening are used, then the protective strip is securely attached to the roof, but the installation becomes elaborate and requires specialized knowledge
Solution Approach 1:
The fastening system is divided into separate functional components: a first lug for attachment to the standing seam and a second lug for securing the protective strip. This segmentation allows each component to perform its specific function independently, simplifying the overall installation process while maintaining secure attachment.
Solution Approach 2:
The double-lug fastener acts as an intermediary element between the standing seam and the protective strip. It provides a simple connection mechanism that eliminates the need for complex pinched seams or through-fastening systems, reducing installation complexity while ensuring reliable attachment.
2Reliability
If through-fastening with self-tapping screws is used, then the protective strip is firmly secured, but the fastening becomes permanent and non-adjustable
Solution Approach 1:
The fastening system transitions from a static, permanent through-fastening to a dynamic, adjustable connection. The articulated lugs can rotate relative to each other, allowing the installer to adjust the orientation and positioning of the protective strip while maintaining firm securation through the articulation mechanism.
Solution Approach 2:
The lugs are pre-formed with hook structures that enable preliminary positioning and adjustment before final securing. The first lug attaches to the standing seam first, providing a stable base, while the second lug can be adjusted to the optimal position before securing the protective strip, enabling flexibility without compromising fastening strength.
3Manufacturing precision
If Z sections are used with precise orientation, then the protective strip is properly engaged, but the installation time increases due to alignment requirements
Solution Approach 1:
The double-lug fastener incorporates self-aligning features through its articulated design. The lugs automatically orient themselves to achieve proper seating engagement with the protective strip edge, eliminating the need for manual alignment using mason's lines or other precision tools, thereby reducing installation time while maintaining manufacturing precision.
Solution Approach 2:
The articulation mechanism allows the lugs to change their angular parameters dynamically during installation. This enables the fastener to adapt to slight variations in protective strip positioning while maintaining proper engagement, reducing the time required for precise alignment compared to fixed-orientation Z sections.
4Object-affected harmful factors
If non-piercing means are used, then the roof sealing is preserved, but the attachment mechanism must be more complex
Solution Approach 1:
The fastening mechanism uses a nested structure where the lugs attach to the standing seam by inserting into the vertical fold of the crimped seam. This nested attachment method preserves the roof sealing integrity by not piercing the roofing material, while the articulated design keeps the fastening mechanism simple and elegant.
Data Source
AI summary
The invention falls within the field of the securing of protective strips covering the ridge or hip regions of a metal roof with standing seams. More specifically, the invention relates to a double tab metal fastener for securing a ridge strap or hip strap on a metal roof covering of the type with a standing seam, comprising:—a first tab (1) forming at one of its ends a hook (2) intended to be secured to the standing seam;—a second tab (3) forming at one of its ends a hook (4) intended to accept an edge of the ridge or hip strap; the two tabs being articulated about an axis (5) allowing their respective rotation in a plane intended to lie substantially parallel to the plane of the roof. This double tab represents a retaining system that can be used for ridging and hipping, which is easy to fit, without any through-fasteners, thus guaranteeing perfect sealing.