Self-aligning Bracket System for Deck Ledger Board Installation
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Solution Overview
Problem
Existing methods for attaching deck ledger boards to buildings are often structurally unsound and violate building codes due to improper installation techniques, leading to safety risks and increased labor and cost, particularly when trying to align and drill through heavy and long boards.
Innovation Solution
A structural bracket system that includes rim and ledger brackets with self-aligning features, allowing for precise drilling and attachment of mounting bolts without requiring multiple workers to hold the boards in place, while adhering to code requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple workers are used to hold the heavy ledger board in place while drilling mounting holes, then the drilling accuracy and alignment are improved, but the installation time and labor cost increase
Solution Approach 1:
The patent introduces a bracket as an intermediary component that bridges the ledger board and the rim board. The bracket includes pre-drilled mounting holes that align with corresponding holes in the rim board, eliminating the need for workers to hold the heavy ledger board in place during drilling. The bracket serves as a mediator that provides both alignment and structural support.
Solution Approach 2:
The bracket is pre-drilled with mounting holes before installation, so that when the bracket is attached to the rim board, the holes are already aligned and ready for bolt installation. This preliminary preparation of the bracket eliminates the need for real-time alignment during the drilling process, reducing installation time while maintaining precision.
2Productivity
If the ledger board is attached directly to the brick, stone, or siding by screws or lag bolts, then the installation speed increases, but the structural soundness and code compliance deteriorate
Solution Approach 1:
The bracket acts as a required intermediary component between the ledger board and the building structure. Instead of attaching the ledger board directly to the veneer surfaces (brick, stone, or siding), the bracket provides a proper mounting interface that connects to the rim board, ensuring structural integrity and code compliance while maintaining installation efficiency.
Solution Approach 2:
The patent replaces the improper mechanical attachment method (screws or lag bolts directly to veneer surfaces) with a proper mechanical system using the bracket that connects to the rim board. This substitution maintains the mechanical fastening approach but applies it to the correct structural element, ensuring both speed and safety.
3Strength
If through-bolting the ledger board to the rim board is performed, then the structural strength and code compliance are improved, but the installation complexity and skill requirement increase
Solution Approach 1:
The attachment system is segmented into separate components: the bracket and the rim board. The bracket is first attached to the rim board, then the ledger board is attached to the bracket. This segmentation simplifies the overall installation process compared to directly through-bolting the ledger board to the rim board, as the bracket serves as a pre-assembled unit that reduces alignment complexity.
Solution Approach 2:
The bracket serves as an intermediary that simplifies the through-bolting process. By attaching the bracket to the rim board first, the ledger board can then be attached to the bracket using bolts that pass through the bracket's pre-drilled holes. This intermediary approach reduces the skill requirement and installation complexity compared to directly aligning and bolting the ledger board to the rim board.
Data Source
AI summary
A system for mounting a ledger board to a rim board is disclosed. A rim bracket can be affixed to the rim board of a structure using one or more fasteners and includes one or more mounting bolt holes to provide a template for drilling mounting bolt holes in the rim board. The ledger bracket can be attached to a ledger board using one or more fasteners and the rim bracket using one or more fasteners. The ledger bracket can include one or more complementary mounting bolt holes to provide a template for drilling mounting bolts holes in the ledger board. The ledger bracket can be attached to the rim bracket to support the ledger board while one or more mounting bolts are installed through the ledger board, ledger bracket, rim bracket, and rim board to attach the ledger board to the structure.