Reversible Stair Layout Template for Accurate Stringer Marking
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Solution Overview
Problem
Constructing stairs from two full, unnotched stringers with clear-spanning tread modules is tedious and time-consuming due to the need for exact and consistent measurements, often resulting in errors that require starting over.
Innovation Solution
A reversible stair layout template that indicates cut marks and screw set points on both stringers, ensuring accurate placement of tread modules by mirroring markings on both sides, allowing for precise marking and cutting without errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual measurement and marking methods are used for each stringer, then flexibility and adaptability are maintained, but construction time increases and error probability increases
Solution Approach 1:
The template pre-calculates and pre-marks all necessary cut lines and screw set points for both stringers before construction begins. By performing the measurement and calculation work in advance on the template, the actual construction process only requires transferring these pre-determined markings to the stringers, dramatically reducing construction time while ensuring consistent accuracy across both stringers
Solution Approach 2:
The template creates a reusable master pattern that can be copied onto both stringers. Instead of independently measuring and calculating each stringer, the builder uses the template as a master copy that ensures identical markings are transferred to both stringers, eliminating measurement errors and ensuring symmetry without requiring repeated manual measurements
2Ease of operation
If separate marking processes are used for left and right stringers, then individual precision can be maintained, but time consumption and complexity increase
Solution Approach 1:
The template merges the marking processes for both left and right stringers into a single unified tool. Both stringer patterns are integrated onto one template sheet, allowing the builder to mark both stringers using the same template in sequence without switching between multiple separate marking tools or recalculating dimensions, significantly simplifying the operation and reducing time
Solution Approach 2:
The template serves multiple functions simultaneously: it acts as a pattern for cut lines, a guide for screw set points, and a reference for both left and right stringers. This multi-functional design eliminates the need for separate specialized tools for each marking task, making the overall process easier and faster
3Manufacturing precision
If custom measurements are taken for each stringer, then precision can be achieved, but the process becomes tedious and error-prone
Solution Approach 1:
The template provides pre-calculated cut lines and screw set points that are copied onto both stringers. This copying process ensures that the precise measurements are transferred accurately without requiring the builder to perform complex calculations or take multiple custom measurements, maintaining high cut accuracy while simplifying the process
Solution Approach 2:
All measurement and calculation work is performed in advance when creating the template. The template incorporates all necessary dimensional data and geometric relationships before construction begins, so the actual stringer marking process only requires simple transfer of these pre-determined values, reducing both complexity and error potential
Data Source
AI summary
Embodiments of the present invention provide a stair layout template that reduces the opportunity for errors when constructing a set of stairs. Embodiments also provide a method for using the template to construct a set of stairs. The template indicates to the builder where a particular set of marks are to be made on the insides (the sides where the tread modules are attached) of both stringers. These marks include the cut marks for the bottom and top ends of the stringers and the “screw set points” that indicate where the tread modules will be attached to the stringers. The template is reversible, with the mirrored markings on both sides, so that the process for one stringer is the mirror image of the other stringer.