Handrail Side Bracing for Wall Mount Stress Distribution
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Solution Overview
Problem
Existing handrails mounted on walls without secondary vertical support often fail to withstand the forces applied by users, particularly large individuals, due to insufficient distribution of stresses, leading to potential material damage or detachment from the mounting surface.
Innovation Solution
A handrail design featuring a rail with distal portions attached to a faceplate and a cross brace, along with side braces that extend between the rail and the mounting surface, providing additional support and distributing forces laterally, vertically, and torsionally, thus enhancing stability and resilience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cantilevered handrail is mounted on a wall without secondary vertical support, then the handrail can be installed in locations with space constraints or insufficient floor strength, but the handrail provides insufficient support to withstand forces generated by large individuals
Solution Approach 1:
The patent transitions from a traditional vertical support structure (balusters extending to the floor) to a lateral bracing system that extends perpendicular to the wall surface. The side braces project outward from the wall at an angle, creating a three-dimensional bracing configuration that distributes loads laterally across multiple attachment points on the wall, thereby maintaining strength while accommodating space constraints.
2Device complexity
If a cantilevered handrail is mounted on a wall without secondary vertical support, then installation is simplified, but the mounting surface experiences excessive stresses that can crush the material or pull the handrail off
Solution Approach 1:
The handrail support system is divided into distinct functional components: the faceplate mounted on the wall, the handrail extending from the faceplate, and the side braces connecting between them. This segmentation allows each component to be optimized independently—the faceplate distributes vertical loads, while the side braces handle lateral and torsional forces—reducing peak stresses on the mounting surface while maintaining overall structural integrity.
Solution Approach 2:
The side braces extend laterally perpendicular to the wall surface, creating a three-dimensional bracing configuration. This lateral extension distributes mounting stresses across multiple attachment points spread out in space rather than concentrating them at a single location on the wall, thereby reducing the stress intensity at each mounting point.
3Reliability
If a handrail is designed to withstand lateral, perpendicular, and torsional forces, then the handrail provides comprehensive support, but the structure becomes more complex
Solution Approach 1:
The side braces serve multiple functions simultaneously: they provide lateral bracing to resist side-to-side forces, perpendicular bracing to resist forces toward or away from the wall, and torsional resistance through their angular configuration. By merging these multiple support functions into a single integrated component, the design achieves comprehensive force resistance without proportionally increasing structural complexity.
Data Source
AI summary
A handrail mountable on a generally vertical building mounting surface adjacent the frame of a building doorway to support elderly, infirm or disabled enter and exit the doorway. Side braces attachable to the door frame and, optionally, a vertical wall mounting surface provide additional lateral strength to the railing and reduce stress on mounting surfaces.