Segmented Metal Waler Assembly for Floating Docks
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Solution Overview
Problem
Conventional waler systems in floating marine docks, primarily made of wood, are structurally weak due to numerous joints, prone to deterioration, labor-intensive, expensive, and environmentally undesirable, with limited lifespan and poor resistance to harsh marine conditions.
Innovation Solution
A waler assembly featuring a metal, preferably aluminum, extrusion system with staggered joints and segments, including a strengthening plate and connectors, providing uninterrupted structural support and allowing for easy attachment of marine accessories, enhancing durability and resistance to harsh conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If multiple lengths of wood beams are installed end to end along each side of the dock, then the waler can cover the required length, but the structure becomes significantly weaker due to numerous joints or splices
Solution Approach 1:
The waler is divided into multiple segments that are joined together using metal connectors and splice plates. These connectors create rigid jointed structures that maintain structural strength while allowing the waler to span the required length. The segmentation principle is applied by using standardized beam lengths (e.g., 16-20 feet) that can be assembled into longer continuous walers.
Solution Approach 2:
The invention combines wood beams with metal connectors, splice plates, and fasteners to create a composite waler structure. The metal components provide reinforcement at critical joint locations, compensating for the weakness introduced by splices in wooden beams. This composite approach allows the waler to achieve both required length and structural strength.
2Strength
If multiple lengths of wood beams are installed side by side to increase strength, then the structural integrity improves, but the amount of wood required doubles and installation becomes more labor intensive
Solution Approach 1:
Instead of using double the amount of wood, the invention segments the waler into modular sections that can be installed sequentially. The metal connectors and splice plates enable single-beam construction with reinforced joints, reducing material quantity while maintaining strength. This modular segmentation approach simplifies installation compared to installing multiple parallel beams.
Solution Approach 2:
The invention changes the structural parameters by introducing metal reinforcement elements (connectors, splice plates, fasteners) that increase the load-bearing capacity of individual beam sections. This allows a single beam with reinforced joints to replace what would traditionally require multiple parallel beams, thereby reducing material quantity and installation complexity while maintaining or improving structural strength.
3Strength
If pressure treated lumber is used for the structural timbers, then the waler achieves adequate initial strength, but it has a limited lifespan and is environmentally undesirable
Solution Approach 1:
The invention uses a composite construction with wood beams for the primary structure and metal connectors, splice plates, and fasteners for reinforcement. The metal components are highly durable and resistant to corrosion, significantly extending the service life of the waler compared to pressure-treated lumber alone. This composite approach maintains initial structural strength while providing long-term durability.
Solution Approach 2:
The invention changes the material composition parameters by replacing a portion of the wood structure with metal reinforcement elements. This substitution increases the durability and service life of the waler, as metal components do not rot or deteriorate like pressure-treated lumber. The parameter change from purely wooden construction to metal-reinforced composite construction directly addresses the limited lifespan issue.
4Ease of manufacture
If conventional wood waler systems are used, then installation is straightforward with traditional materials, but the system is susceptible to deterioration from rot and saltwater exposure
Solution Approach 1:
The invention employs a composite structure combining wood beams with metal connectors, splice plates, and fasteners. The metal components provide superior resistance to saltwater corrosion and rot compared to pressure-treated lumber, significantly improving the reliability and durability of the waler system. The ease of installation is maintained through the use of standardized metal connection hardware that simplifies assembly.
Solution Approach 2:
The invention changes the material resistance parameters by introducing metal reinforcement elements that are inherently more resistant to biological deterioration and saltwater corrosion. This parameter change from wood-only to metal-reinforced composite construction directly addresses the reliability issue while maintaining ease of installation through standardized connection methods.
Data Source
AI summary
A waler assembly for floating docks and walkways includes an elongate metal extrusion for engaging the side of a series of adjoining float components. The extrusion includes a compartment for conformably receiving an elongate wedge. Connector rods join the extrusion and wedge to the float components. The extrusion carries an elongate strengthening plate that extends across the compartment of the extrusion. Each of the extrusion, wedge and strengthening plate includes a plurality of discrete segments that are aligned end to end. The joints between adjoining segments of the waler assembly are offset to provide improved structural integrity of the waler assembly and the floating dock or walkway.