Railing Post Mounting Arm for Corrosion Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Aluminum handrails embedded in concrete balconies undergo galvanic corrosion due to contact with steel reinforcement bars, leading to disintegration and concrete spalling, especially in coastal environments, resulting in safety issues and costly repairs.
Innovation Solution
A corrosion-resistant railing system featuring a stainless steel or aluminum insert with a mounting arm that protrudes from the post, allowing for drainage and preventing contact with reinforcement bars, combined with a method using epoxy or acrylic adhesive that does not contract or expand, ensuring secure installation and preventing water intrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If aluminum posts are embedded in concrete and drilled to install handrails, then the handrail can be securely mounted, but the aluminum posts contact steel reinforcement bars causing galvanic corrosion and concrete spalling
Solution Approach 1:
The patent introduces a mounting arm as an intermediary component that connects the handrail to the post without requiring direct drilling into the aluminum post. The mounting arm is secured to the post through a non-corrosive method (such as mechanical fastening or non-galvanic bonding), eliminating contact between aluminum and steel reinforcement bars in the concrete, thus preventing galvanic corrosion while still providing secure handrail mounting
Solution Approach 2:
The mounting system is divided into separate components: the aluminum post, the mounting arm, and the handrail. This segmentation allows the mounting arm to be attached to the post without drilling into the aluminum, and the handrail to be mounted to the mounting arm separately. This modular approach prevents direct contact between aluminum and steel reinforcement, eliminating the galvanic corrosion pathway while maintaining structural integrity
2Strength
If large holes are drilled into concrete to install aluminum posts, then the posts can be securely anchored, but the drilling contacts steel reinforcement bars causing galvanic reactions
Solution Approach 1:
The mounting arm serves as a mediator that transfers the mounting load from the handrail to the post without requiring the aluminum post to be directly anchored to the concrete. The mounting arm can be secured to the post using non-corrosive methods, eliminating the need for large holes that would contact steel reinforcement bars and cause galvanic reactions
Solution Approach 2:
The invention extracts the anchoring function from the aluminum post itself and relocates it to the mounting arm or a separate mounting mechanism. This extraction allows the post to remain intact and non-corrosive, while the anchoring is performed by components that do not create galvanic pathways between aluminum and steel reinforcement in the concrete
3Stability of the object's composition
If gypsum-based bases are used around aluminum posts, then the posts are initially stable, but the gypsum deteriorates over time allowing saltwater intrusion and concrete spalling
Solution Approach 1:
The invention changes the material parameter of the base material from gypsum (which deteriorates) to a durable, water-resistant material that does not deteriorate over time. This parameter change ensures long-term stability and prevents saltwater intrusion while maintaining the initial stability provided by the base material
Solution Approach 2:
The mounting system uses composite construction with the aluminum post, non-corrosive mounting arm, and durable base material working together. This composite approach combines materials with complementary properties: the aluminum provides structural integrity, the mounting arm provides corrosion-resistant connection, and the durable base material provides long-term stability without deterioration
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system significantly reduces corrosion and concrete spalling, enhancing the longevity and safety of balcony railings by preventing galvanic reactions and water intrusion, while being cost-effective and operationally efficient.
Implementation Method 1
securing the mounting arm of the post within a hole in a concrete substrate using an epoxy or acrylic adhesive that does not contract and expand over time
Implementation Method 2
The post includes a drainage channel that allows for the escape of water
Data Source
AI summary
An improved mounting structure for the posts of hand rail systems including a mounting arm member positioned within a sleeve monolithically formed within the inner chamber of the post. The sleeve includes a slit that allows for the outflow of water, thereby limiting corrosion and degrading of the post and mounting structure. A series of nubbed projections create grooves within the surface of the sleeve, to secure the mounting arm into the sleeve in a strong manner. A secure fit limits the amount of liquid trapped within the sleeve reducing corrosion. The mounting arm has smaller dimensions, reducing the chances that the arm comes into contact with support rods embedded within the concrete during installation. By avoiding contact with the support rods, concrete spalling is dramatically reduced, adding to the lifetime of the rail system.