Adjustable Joist Hanger With Threaded Height Control
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Solution Overview
Problem
Conventional post stirrup brackets lack adjustability, making it difficult to maintain the correct height and orientation of joists or posts during concrete setting, which can result in improper positioning or orientation.
Innovation Solution
An adjustable joist hanger with a mounting foot and a U-shaped joist carrier that includes a partially threaded member and an adjustment mechanism, allowing for adjustable height, separation distance, angle, and pitch adjustments to ensure proper positioning and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional post stirrup bracket is used, then the structure is simple and easy to manufacture, but the height and orientation of the joist cannot be adjusted, resulting in incorrect positioning
Solution Approach 1:
The bracket is divided into two main segments: a mounting foot that attaches to the concrete surface and a U-shaped joist carrier that holds the joist. These segments are connected through threaded members, allowing independent positioning of each component. This segmentation enables adjustment of the joist carrier relative to the mounting foot, providing height and orientation adjustability while keeping each component relatively simple in structure.
Solution Approach 2:
The bracket transitions from a fixed, static structure to a dynamic, adjustable structure. Threaded members extend through the mounting foot and engage with the joist carrier, allowing the carrier to be positioned at various heights and orientations. The threaded connection provides controlled movement and secure locking, enabling the bracket to adapt to different installation requirements while maintaining structural integrity.
2Manufacturing precision
If the correct height and orientation are maintained during concrete setting, then proper joist positioning is achieved, but this requires precise control and adjustment capabilities
Solution Approach 1:
The mounting foot is attached to the concrete surface first, establishing a stable reference point. The threaded members are positioned in advance, allowing the joist carrier to be suspended at the correct height before the concrete fully sets. This preliminary positioning ensures that the joist will be at the correct level and orientation once the concrete cures, eliminating the need for complex adjustment mechanisms during the pouring process.
Solution Approach 2:
The patent replaces complex mechanical leveling systems with a simpler threaded adjustment mechanism. The threaded members provide precise height control through rotational movement, allowing easy adjustment of the joist carrier's position. This mechanical substitution simplifies the operation while achieving the required positioning precision, as the threaded connection allows fine-tuned adjustment without requiring specialized tools or procedures.
Data Source
AI summary
An adjustable joist hanger including a mounting foot having a substantially planar lower abutment surface, the mounting foot having at least one attachment opening to attach the mounting foot relative to a surface and at least one, at least partially threaded member extending therefrom, a substantially U-shaped joist carrier adapted to receive a portion of a joist and mounted for movement relative to the at least one, at least partially threaded member and an adjustment mechanism for adjusting the joist carrier relative to the mounting foot.