Preceding Guardrail Holder for Scaffolding Safety
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Solution Overview
Problem
Existing scaffolding systems require unsafe and often prohibited entry to unprotected floor levels for mounting guardrails, and temporary preceding guardrails are typically specialized and not reusable.
Innovation Solution
A preceding-guardrail holder assembly that uses existing tube-shaped guardrails with curved fastening hooks and recesses, allowing them to be supported and hung from a preceding-guardrail holder for safe placement on upper, unprotected floor levels, without the need for new specialized guardrails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional guardrail is mounted on a scaffolding system, then the floor level is protected, but unsafe entry to unprotected floor levels is required for mounting
Solution Approach 1:
The preceding-guardrail holder is mounted on the scaffolding system before the guardrail itself is installed. This preliminary positioning of the mounting mechanism allows the guardrail to be safely attached from a protected lower level, eliminating the need for workers to access unprotected floor levels. The holder serves as a pre-positioned attachment point that enables subsequent safe installation.
Solution Approach 2:
The preceding-guardrail holder acts as an intermediary component between the scaffolding system and the guardrail. It provides a secure attachment point on the scaffolding structure that allows the guardrail to be mounted safely from below, mediating the connection between the existing protected level and the new guardrail component.
2Reliability
If specialized preceding guardrails are used, then safe placement on upper unprotected levels is enabled, but device complexity and cost increase due to non-reusability
Solution Approach 1:
The preceding-guardrail holder is designed as a universal mounting component that can be used with standard guardrails and integrated into existing scaffolding systems. It serves multiple functions: mounting the guardrail, providing structural support, and enabling safe installation from below. This multi-functionality eliminates the need for specialized single-use preceding guardrails.
Solution Approach 2:
The holder is designed to be reused after the guardrail installation is complete. Once the guardrail is securely attached to the scaffolding system, the holder can be removed and reused for installing subsequent guardrails on other levels or sections, preventing waste and reducing overall system complexity.
3Adaptability or versatility
If standard guardrails are used without modification, then component availability is maintained, but safe installation from lower levels is not possible
Solution Approach 1:
The preceding-guardrail holder is pre-mounted on the scaffolding structure at the desired height before the guardrail is installed. This preliminary positioning creates a secure attachment point that allows workers to safely attach the standard guardrail from a protected lower level, maintaining compatibility with existing guardrail components while enabling safe installation procedures.
Data Source
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AI summary
Preceding guardrail holder for a scaffolding system, configured for cooperation with guardrails provided with a fastening hook at a longitudinal end. The preceding guardrail holder includes a first and a second cross connection element extending perpendicular to a mounting plate and a retaining plate, which cross connection elements are mutually spaced apart and together bound a fastening hook receiving space for receiving in the fastening hook receiving space the fastening hook of a first guardrail. The distance between the first and the second cross connection element is such that, if the fastening hook is received in the fastening hook receiving space and the first guardrail is not supported otherwise, a recess on a radial inner side of the fastening hook rests on the first cross connection element, and a radial outer side of the fastening hook abuts against the second cross connection element, the first guardrail thereby being wholly supported by the single preceding guardrail holder.