Friction Release Bracket for Deck Post Anchoring
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Solution Overview
Problem
Existing support structures for decks and similar lightweight constructions are prone to structural failure due to uneven soil movement and variable frost conditions, which cause asymmetrical uplift forces on footings, leading to stress imbalances and potential connection failures in the post and beam system.
Innovation Solution
A post anchoring support device comprising a ground anchor with helical blades and a post receiving bracket that allows lateral movement of the post within the bracket, equipped with elongated holes and embossed regions to reduce friction and accommodate vertical movement, enabling the system to absorb and release uneven forces without structural failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If rigid connections are used between footings, posts, and beams, then structural stability is improved, but connection failure risk increases due to uneven soil movement and frost conditions
Solution Approach 1:
The patent introduces a dynamic friction release mechanism that allows the post bracket to transition between static friction (holding position) and kinetic friction (allowing movement) states. The elongated holes and embossed surfaces enable controlled sliding when forces exceed friction thresholds, allowing the system to adapt to uneven soil movement while maintaining stability under normal conditions.
Solution Approach 2:
The patent changes the friction parameter between the post bracket and post by using embossed surfaces with reduced coefficient of friction. This parameter modification allows the connection to maintain rigidity under normal loads while enabling controlled movement when asymmetrical forces occur, preventing connection failure.
2Ease of manufacture
If floating deck construction is used, then construction cost and simplicity are improved, but connection integrity deteriorates due to asymmetrical uplift forces
Solution Approach 1:
The patent introduces an intermediary friction release mechanism between the post bracket and post connection. This intermediary element absorbs the asymmetrical uplift forces generated by floating deck construction, preventing force transmission to the post-beam connection and maintaining integrity without requiring frost-resistant footings.
3Reliability
If frost-resistant footings are installed, then connection reliability is improved, but construction cost and labor increase
Solution Approach 1:
The patent extracts the frost-resistant footing requirement from the connection reliability solution. Instead of requiring footings to extend below the frost line, the invention extracts the protective function and implements it through the friction release mechanism in the post bracket, simplifying the overall construction while maintaining reliability.
4Manufacturing precision
If rigid post brackets are used, then post positioning accuracy is improved, but ability to accommodate soil movement decreases
Solution Approach 1:
The patent transforms the rigid post bracket into a dynamic system with controlled mobility. The elongated holes and embossed surfaces enable the bracket to maintain precise positioning under normal conditions while allowing controlled sliding movement when soil movement occurs, accommodating both positioning accuracy and adaptability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device effectively compensates for asymmetrical uplift forces, preventing connection failures by allowing posts to slide within the bracket, thus maintaining structural integrity under varying soil conditions and frost-induced stress.
Implementation Method 1
having a raised portion on the outside surface adjacent each elongate hole adapted to abut a lower surface of a head of a fastener passing through the elongate hole and into the post to allow the fastener to travel within the elongate hole upon the application of a vertically force to the post anchoring support device sufficient to overcome a coefficient of friction between the head of the fastener and the raised portion
Data Source
AI summary
A post anchoring support device comprising a ground anchor having a shaft with a threaded upper portion terminating in an upper end that may be engaged and rotated by a drive tool for rotating the shaft about a vertical axis, and a lower portion for insertion into the ground, and a post receiving bracket having a base with an elongate aperture adapted to receive the externally threaded portion of the shaft, a support portion defining a support surface for abutting the end of the post, vertical planar walls extending above the support surface, each planar wall having an inside surface for abutting a side of the post, and each planar wall defining a plurality of vertically oriented elongate holes and having a raised portion on the outside surface adjacent each elongate hole adapted to abut a lower surface of a head of a fastener passing through the elongate hole and into the post to allow the fastener to travel within the elongate hole upon the application of a vertically force to the post anchoring support device sufficient to overcome a coefficient of friction between the head of the fastener and the raised portion.