Two-Part Clamping Hanger with Ratchet Teeth for Adjustable Joists
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Solution Overview
Problem
Existing joist hangers require precise alignment and sizing for fastener installation, lack versatility for varying joist sizes, and cannot be pre-attached to a joist before ledger attachment, leading to installation challenges.
Innovation Solution
A two-part clamping hanger with cooperative locking teeth and ratchet mechanisms allows for attachment to a joist prior to ledger installation, featuring adjustable positioning and preset fasteners for improved alignment and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single-piece joist hanger is used, then the structure is simple and easy to manufacture, but it cannot be attached to a joist prior to ledger installation and requires precise alignment during installation
Solution Approach 1:
The joist hanger is divided into two separate members: a first member with a first side and a second member with a second side. These members are lockingly attachable to one another via cooperative locking teeth, allowing the hanger to be assembled and adjusted before attachment to the joist and ledger, providing installation flexibility while maintaining structural simplicity.
2Adaptability or versatility
If a specifically sized joist hanger is required for each size joist, then the connection strength is optimized, but the adaptability for varying joist sizes is reduced
Solution Approach 1:
The hanger members incorporate adjustable positioning mechanisms with locking teeth that can engage at different positions along the joist. This allows the hanger to adapt to varying joist sizes and positions while maintaining strong connection through the lockingly attachable design, eliminating the need for multiple fixed-size hangers.
3Strength
If fasteners are driven obliquely through the joist and into the support member, then the connection strength is enhanced, but the installation precision and alignment difficulty increase
Solution Approach 1:
The hanger members are pre-assembled with preset fasteners positioned and aligned before attachment to the joist and ledger. This preliminary positioning ensures that fasteners are correctly aligned and can be driven at the preferred positions and angles, reducing installation difficulty while maintaining enhanced connection strength through oblique toenailing.
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
Enables efficient, precise, and adaptable attachment of joists of varying sizes with reduced installation time and enhanced strength through pre-attached fasteners and ratchet locking.
Implementation Method 1
The first member and second member are lockingly attachable to one another via cooperation of the at least one first locking tooth and the second locking tooth to trap the elongate building member between the first side and second side in a clamped arrangement
Implementation Method 2
The first web member and second web member include cooperative ratchet teeth to lock to one another and thereby attach the first member to the second member to trap a joist between the first side member and second side member in a clamped arrangement
Data Source
AI summary
A hanger for attaching an elongate beam to a building support includes a first member attachable to a second member. The first member includes a side and a web section with locking teeth. The second member includes a slot with at least one locking tooth. The slot of the second member may be formed in a second web section. The first member and second member are lockable to each other at a plurality of different lateral positions to accommodate elongate beams having a variety of thicknesses.