Adjustable grab railing
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Solution Overview
Problem
Existing grab railings are inflexible and cannot be easily adjusted to accommodate different configurations, such as varying angles and heights, which does not comply with building codes requiring the top of the railing to be between 34 to 38 inches above the stair tread and to match the pitch of the stairs.
Innovation Solution
An adjustable grab railing system with multiple configurations that allows for adjustable mounting brackets, upper and lower rails, and an adjustment rail, featuring telescoping mechanisms and locking fasteners to secure the rails at various angles and heights, enabling the grab railing to be mounted on different surfaces and adjusted in zero-degree horizontal or angled configurations from 31 to 43 degrees in 2-degree increments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed grab railing is installed to meet building code requirements, then the railing provides stable support and structural integrity, but it cannot be adjusted to accommodate different stair configurations or building code variations
Solution Approach 1:
The grab railing is divided into multiple segments including an upper rail, lower rail, and adjustment rail that can be independently positioned and locked. The mounting bracket is also segmented with separate adjustment mechanisms for angle and height, allowing each component to be adjusted independently to achieve the desired configuration while maintaining structural integrity.
Solution Approach 2:
The railing system transitions from a static fixed structure to a dynamic adjustable structure. The adjustment rail can be positioned at multiple heights along the lower rail, and the entire assembly can be angled relative to the mounting surface. Locking fasteners maintain the dynamic positions while providing the stability of a fixed structure when installed.
2Adaptability or versatility
If multiple fixed grab railing configurations are installed to accommodate different angles and heights, then building code compliance is achieved, but installation time and material usage increase
Solution Approach 1:
A single grab railing assembly is designed to perform multiple functions by accommodating various angles (0 to 45 degrees) and heights through its adjustment mechanisms. The same unit can be installed on different stair configurations without requiring multiple pre-configured railings, thereby reducing installation time and material usage while achieving code compliance.
Solution Approach 2:
The railing system allows for parameter changes in angle and height through adjustable components. The adjustment rail can be positioned at different heights, and the mounting bracket can be angled relative to the mounting surface, enabling the same physical object to adapt to different geometric parameters required by various building codes.
3Manufacturing precision
If the grab railing height is fixed during installation, then the structure is simple and quick to install, but it cannot comply with building codes requiring 34 to 38 inches above the stair tread
Solution Approach 1:
The adjustment rail is designed with pre-marked positions or guide features that indicate the correct height for code compliance (34 to 38 inches above stair tread). During installation, the installer can quickly position the adjustment rail at the appropriate height without requiring complex measurements or calculations, thereby maintaining ease of installation while achieving precise height compliance.
Data Source
AI summary
An adjustable grab railing is mounted to a vertical structure next to the steps. The mounting surface can be flat or a corner. The grab railing includes mounting brackets, an upper rail, a lower rail connected to the upper rail, and an adjustment rail. The mount ends of the upper rail and adjustment rail are selectively, pivotably mounted to mount tabs. A first locking fastener selectively secures each connection. The outer end of the adjustment rail telescopes with respect to the lower rail. A second locking fastener selectively locks the position of the adjustment rail with respect to the lower rail allowing the upper and lower railings to be locked at different angles with respect to the steps and the vertical mounting structure. The lower rail can pivot to be mounted to a horizontal surface.