Roof Rake Plate Retainer With Standoff Boss Gap
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Solution Overview
Problem
Existing roof assemblies with floating structural components face issues of improper connection and strength due to incorrect installation of fasteners, leading to potential distortion, leaks, and separation from the underlying support structures under repeated loads.
Innovation Solution
The introduction of a rake plate retainer with a retention flange and standoff boss configuration that allows for predetermined lateral retention and longitudinal displacement, eliminating the need for specialty fasteners and ensuring proper connection and strength by maintaining a minimum gap between the rake plate and the building structural.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the rake plate is rigidly fixed to the building structural, then the connection strength is improved, but the ability to compensate for loads through displacement is lost
Solution Approach 1:
The rake plate retainer introduces a dynamic element by allowing controlled longitudinal displacement while maintaining lateral retention. The standoff boss creates a predetermined gap that permits the rake plate to move longitudinally to compensate for wind, precipitation, and thermal loads, while the retention flange ensures the plate remains laterally positioned. This dynamic configuration resolves the contradiction by enabling both connection strength and load compensation capability.
2Reliability
If specialty fasteners are used to ensure proper connection, then the connection reliability is improved, but the device complexity increases
Solution Approach 1:
The rake plate retainer acts as an intermediary component between the rake plate and building structural. Rather than using complex specialty fasteners, the retainer provides a simplified interface with a standoff boss that maintains the predetermined gap and ensures proper connection reliability. This intermediary approach reduces device complexity while maintaining or improving connection reliability.
3Adaptability or versatility
If the rake plate is allowed to displace freely, then the ability to float and compensate for loads is improved, but the lateral retention and structural integrity are compromised
Solution Approach 1:
The rake plate retainer applies local quality by providing different types of retention at different locations and directions. The retention flange provides strong lateral retention to maintain structural integrity, while the standoff boss creates a controlled gap that allows longitudinal displacement for floating capability. This localized differentiation of retention qualities resolves the contradiction between lateral stability and floating ability.
Data Source
AI summary
Apparatus and associated method contemplating a roof assembly having a plurality of roof structurals. A rake plate having a panel flange is configured for attaching a roof panel thereto. A fastener connects the rake plate to the building structural. A rake plate retainer has a retention flange defining a fastener opening through which the fastener passes, and defines a standoff boss apart from the fastener that is configured to define a predetermined gap for the rake plate that permits operable movement of the rake plate relative to the building structural.