Monolithic Ledger Board With Integrated Drainage for Deck Attachments
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Solution Overview
Problem
Existing deck attachments to home structures fail due to water penetration, leading to rot and structural failure, which can result in costly repairs and safety hazards.
Innovation Solution
A monolithic ledger board with a specific cross-sectional configuration that includes a flashing portion, gutter conduit, support surface, mounting surface, fastener channels, and siding groove, designed to prevent water ingress and facilitate secure attachment of decks and stairs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional ledger board attachment methods are used, then installation is simple and cost-effective, but water penetration occurs leading to rot and structural failure
Solution Approach 1:
The patent combines multiple protective functions (flashing, gutter, drainage, siding integration) into a single monolithic ledger board structure. This integration eliminates the need for separate components while providing comprehensive water protection, thereby improving reliability without proportionally increasing complexity.
Solution Approach 2:
The gutter conduit acts as an intermediary element that captures and redirects water away from the attachment point. This intermediate structure prevents direct water contact with the ledger board interior, solving the water penetration problem while maintaining structural integrity.
2Duration of action of stationary object
If water protection features are added to prevent rot, then durability improves, but manufacturing complexity increases
Solution Approach 1:
The patent changes the geometric parameters of the ledger board by adding standardized features like the gutter conduit and siding groove. These parameter modifications enable water protection while maintaining compatibility with existing manufacturing processes for extruded or molded lumber products.
Solution Approach 2:
The monolithic structure integrates different functional zones (attachment surface, gutter conduit, siding groove) within a single material body. This composite design provides multiple protective functions simultaneously while being manufacturable as a single piece, balancing durability with ease of production.
3Object-affected harmful factors
If integrated siding groove is included, then water sealing improves, but installation time increases
Solution Approach 1:
The siding groove is pre-formed as part of the monolithic ledger board structure during manufacturing. This preliminary action eliminates the need for field installation of separate flashing or siding components, thereby improving water sealing without significantly increasing installation time.
Data Source
AI summary
A ledger board for use in constructing a structural extension on an existing structure has a monolithic body that extends along a longitudinal axis and is attachable to one or more structural members of the existing structure. The monolithic body includes an inner attachment surface for engaging the existing structure and has a cross-sectional configuration defining an upper flashing portion having an outer surface, an upwardly open gutter conduit extending along the longitudinal axis below the flashing portion, an upwardly facing support surface extending along the longitudinal axis above the gutter conduit, an outwardly facing mounting surface extending along the longitudinal axis below the support surface, at least one fastener channel that extends along the longitudinal axis below the support surface and is open through the mounting surface, and a downwardly open siding groove extending along the longitudinal axis.