Triangular Concrete Stair Brackets for Riser Support
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Solution Overview
Problem
The construction of concrete staircases is hindered by the need for custom-cut stringers, which are time-consuming to install, prone to stress failures due to high concrete pressure, and costly to replace, with existing metallic bracket systems being complex and requiring special storage and fasteners.
Innovation Solution
Triangular-shaped brackets that attach to riser forms and side walls, using readily available fasteners for quick installation and correction, providing strength and clearance for workers, and allowing for easy storage and replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If custom-cut stringers are used to hold planks in place, then the forms can shape the stairs, but the installation is time-consuming and the stringers are prone to stress failures due to high concrete pressure
Solution Approach 1:
The stringer is divided into multiple modular brackets that can be independently assembled. Each bracket contains standardized attachment points for planks, eliminating the need for custom cutting while maintaining structural integrity. The segmentation allows for quick assembly and reduces installation time significantly.
Solution Approach 2:
The design changes from continuous custom-cut wood stringers to standardized metal brackets with fixed geometric parameters. The brackets are designed with optimized thickness and attachment point spacing to withstand concrete pressure, providing reliable strength without requiring time-consuming custom fabrication.
2Adaptability or versatility
If stringers are made for a specific staircase by cutting steps into a wooden board, then the forms can be customized, but the process is costly to replace and requires special storage
Solution Approach 1:
The bracket design serves multiple functions: it acts as a stringer support, a plank attachment mechanism, and a formwork component. The standardized design with adjustable features provides customization capability for different staircase configurations while maintaining ease of manufacture and storage compared to custom-cut wooden stringers.
3Strength
If existing metallic bracket systems are used, then strength is provided, but the systems are complex and require special storage and fasteners
Solution Approach 1:
The design merges the bracket body and fastening mechanisms into a single integrated component. The bracket includes built-in attachment points and features that eliminate the need for separate special fasteners. This integration reduces system complexity while maintaining the structural strength needed to withstand concrete pressure during pouring.
Data Source
AI summary
Apparatus, systems and methods for holding a riser of a step form in position when pouring concrete to make a stairway are provided. The apparatus is a bracket that may include a riser support for coupling with the riser. The bracket also includes a top support. A first end of the top support may be connected to the riser support for providing support to the riser support. The bracket may additionally include a back support for providing support to the riser support. The back support may be coupled to both the riser support and the top support such that an area enclosed by the riser support, the back support and the top support is a triangle. At least two of the riser support, the back support and the top support may include fastening plates for coupling with an external support.