Modular Building Connection Node for Alignment and Weatherproofing
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Solution Overview
Problem
Conventional methods for connecting prefabricated building modules during construction often damage the weatherproofing layer and result in misalignment issues due to limited access and poor load distribution, leading to increased water ingress and delays in construction.
Innovation Solution
A connection node system that allows vertical supports to be connected internally using a bolt, with a coupler nut and diaphragm plate configuration that maintains the weatherproofing integrity and enables precise alignment from above, using a bolted system for secure and efficient stacking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If large joining plates are used to connect modules, then vertical and horizontal continuity is achieved, but the weatherproofing layer is damaged and water ingress risk increases
Solution Approach 1:
The connecting plate is nested within the weatherproofing layer rather than extending beyond it. The plate is positioned in a recess or cavity formed in the weatherproofing material, allowing the weatherproofing layer to wrap around and cover the connection hardware, thus maintaining continuity while preventing water ingress.
Solution Approach 2:
A removable access panel or temporary opening in the weatherproofing layer is provided around the connecting plate. This allows installers to access the connection hardware during assembly, after which the access panel is reinstalled to restore the weatherproofing barrier. The access panel serves its purpose temporarily during construction and then becomes part of the finished weatherproof envelope.
2Ease of operation
If construction personnel position at the base of module for connection, then access to connection points is possible, but alignment precision deteriorates due to limited visual access
Solution Approach 1:
The connection system is designed to be accessible from multiple dimensions. In addition to ground-level access, the connecting plates are positioned such that they can be accessed from above by lowering components through the module opening. This multi-directional accessibility allows installers to work from positions where alignment can be visually monitored, improving precision while maintaining ease of operation.
3Strength
If modules are connected with conventional joining systems, then structural connection is achieved, but installation time increases due to manual jacking and alignment adjustments
Solution Approach 1:
Alignment features such as guide pins, tapered surfaces, or pre-positioned locating elements are incorporated into the connection system. These features automatically align the modules during the lifting and lowering operation, eliminating the need for manual jacking and adjustment. The modules are designed to self-align as they are brought together, maintaining strong structural connection while dramatically reducing installation time.
4Ease of operation
If weatherproofing layer is peeled back for plate connection, then connection access is improved, but labor cost and risk of damage increase
Solution Approach 1:
The weatherproofing layer is designed with integrated access features that serve multiple purposes. Recesses, cavities, or removable panels are incorporated into the weatherproofing design specifically to provide access to connection hardware. These features serve both as part of the weatherproofing system and as built-in access points, eliminating the need for separate access procedures and reducing overall installation complexity.
Data Source
AI summary
A connection node assembly for use in connecting an upper prefabricated building module to a lower module. Hollow vertical edge supports of the building modules have top and bottom connection parts. A connecting bolt can be passed through the top part of an upper vertical support in the upper building module and seated within the bottom part of that vertical support with the shank extending downward. The shank engages a threaded aperture in a connecting nut secured within the top part of a corresponding lower vertical support in the lower building module. Diaphragm plates sandwiched between the upper and lower vertical supports are used to tie horizontally placed modules together.