Adjustable Floor-to-Wall Connectors for Steel Joist Load Distribution
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Solution Overview
Problem
The existing light steel framing systems face challenges in efficiently distributing floor joist end reactions to wall studs, leading to complexity in installation, increased costs, and difficulties in meeting requirements for load distribution, fire stopping, acoustic performance, and construction tolerances.
Innovation Solution
The development of adjustable connectors and flat plate distribution members that allow for flexible connection of joists to wall systems, enabling load distribution without aligning joists with wall studs, while providing fire stopping and acoustic capabilities, and accommodating site tolerances through slotted connectors and preassembly options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If joists are coordinated to align with wall studs to accommodate floor joist end reactions, then load distribution is achieved, but drawing and assembling complexity increases
Solution Approach 1:
A load distribution element is introduced as an intermediary component between the joist and wall studs. This element receives the concentrated load from the joist end reaction and distributes it to multiple wall studs, eliminating the need for precise joist-stud alignment while maintaining structural integrity
Solution Approach 2:
The connection system is segmented into distinct functional components: the joist, the load distribution element, and the wall studs. This segmentation allows each component to perform its specific function independently, simplifying the overall assembly process and reducing coordination complexity
2Strength
If special shapes are used to distribute high floor joist end reactions to multiple studs, then load distribution capability is improved, but supply and installation costs increase
Solution Approach 1:
The load distribution element uses uniform, standardized geometry that matches common structural profiles. This homogeneity allows the element to be manufactured using standard processes and installed with常规 fastening methods, avoiding the need for expensive custom-formed special shapes while maintaining load distribution effectiveness
3Stability of the object's composition
If connectors are made rigid to provide stable connection, then structural stability is improved, but flexibility for onsite construction tolerances is reduced
Solution Approach 1:
The connector incorporates adjustable features such as slotted holes or movable components that allow it to adapt to varying onsite conditions. This dynamic capability enables the connector to accommodate construction tolerances and alignment variations while maintaining stable load transfer once installed
4Reliability
If multiple design details are incorporated to meet complete building system requirements, then compliance with building codes is improved, but fabrication and installation complexity increases
Solution Approach 1:
Multiple building system requirements are merged into a single integrated load distribution element design. The element simultaneously addresses load distribution, fire stopping, acoustic performance, and sheathing membrane installation provisions, eliminating the need for separate components for each requirement and simplifying both fabrication and installation
Data Source
AI summary
The present invention is a light steel framed metal joist including an adjustable connector fastened to the joist web that allows one to adjust the length and angle of the joist when attaching to floor and wall systems. The adjustment allows one to install end connectors onto the joists prior to installation while retaining flexibility of orientation during construction. The joist functions in both web bearing and bottom chord bearing configurations. A flat plate distributing member allows one to design a floor system without having to coordinate the positioning of the joist with wall studs. Angle or U shaped members can be fastened to the lower portion of the flat plate distribution member to support joists during construction. The invention further provides a seamless fire stopping system with consideration for acoustic dampening.