Ladder Accessory with Rail Channels for Pitched Roof Footing
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Solution Overview
Problem
Firefighters face challenges when performing vertical ventilation on pitched roofs, including lack of stable footing, danger of structural collapse, disorientation, and the need for extensive resources, which can be impractical and risky, especially in situations where limited personnel are available.
Innovation Solution
A ladder accessory in the form of an elongated rectangular open box structure with parallel ladder rail channels that securely attach to standard ladder rails, providing additional footing and support, allowing firefighters to work safely on pitched roofs without requiring additional manpower or cumbersome equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If firefighters use conventional ladder methods for vertical ventilation, then they can access the roof, but they lack stable footing and face danger of structural collapse
Solution Approach 1:
The device segments the ladder structure by adding a separate platform component that attaches to the ladder rails. This platform provides additional footing surface independent of the ladder rungs, allowing firefighters to distribute their weight and maintain stability without relying solely on the ladder structure.
Solution Approach 2:
The invention adds a horizontal dimension to the vertical ladder structure by extending the platform perpendicular to the ladder rails. This creates a new working plane that provides stable footing while maintaining the original ladder access function, effectively adding spatial dimensionality to solve the footing problem.
2Productivity
If firefighters use extensive resources including two well-trained firefighters, cutting equipment, ladders, and charged water line for vertical ventilation, then ventilation can be performed effectively, but it becomes impractical when limited personnel are available
Solution Approach 1:
The device is designed to be self-contained and attach to standard ladder rails without requiring additional support structures or personnel. The platform autonomously provides the necessary footing stability, eliminating the need for a second firefighter to assist with positioning or additional support equipment.
Solution Approach 2:
The device is designed with universal compatibility to attach to standard ladder rails used in firefighting operations. This multi-functional design allows the same platform to be used across different ladder types and configurations, reducing the need for specialized equipment for each scenario.
3Productivity
If firefighters make roof cuts close to the seat of the fire for effective vertical ventilation, then ventilation efficiency improves, but the risk of structural collapse increases
Solution Approach 1:
The platform provides pre-established stable footing before firefighters engage in roof cutting operations. This advance preparation of a secure working position allows firefighters to maintain balance and control while working near compromised structural areas, cushioning against the increased collapse risk.
Solution Approach 2:
The device provides localized stability enhancement at the specific working position on the roof, rather than requiring overall structural reinforcement. By concentrating the stability benefit at the cutting location, firefighters can safely perform ventilation tasks near the fire seat without compromising the entire roof structure.
Data Source
AI summary
A ladder accessory that is used with a ladder that extends out from the side of the ladder to provide footing for a worker. The accessory comprises an elongated rectangular open box structure defining at least one set of two parallel ladder rail channels that are placed crosswise (perpendicular) to the length of the box structure and are spaced apart a distance such that one of said channels can engage one rail of a ladder and the other channel can engage the other rail and both channels engage a rung. The rectangular elongated box defines two side walls that contain single hook key slots that can be engaged with rungs of the ladder when the accessory is placed lengthwise parallel to the rails of the ladder and, with a rung lock mechanism, can be fastened to the ladder and carried with the ladder.