Lattice Girder Assembly Web for Weather Protection Roof Safety
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Solution Overview
Problem
The assembly and disassembly of weather protection roofs require workers to climb truss structures, posing safety risks and increasing costs due to the need for personal protective equipment and time-consuming processes, especially when installing or removing protective tarps and connecting trusses.
Innovation Solution
A flat truss construction with an assembly web that allows workers to move safely along the truss girder, eliminating the need for personal protective equipment by providing a protected walkway with lateral supports and railing elements, which are detachably anchored to the truss rods, enabling secure access and reduced risk of falling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If workers climb truss structures for assembly and disassembly work, then access to truss areas is achieved, but safety risks and costs increase due to need for personal protective equipment
Solution Approach 1:
An assembly web is introduced as an intermediary structure between workers and the truss. The assembly web provides a safe, protected platform that workers can stand and move on while performing assembly and disassembly tasks, eliminating the need for workers to directly climb and balance on the truss structure itself.
Solution Approach 2:
The assembly web is divided into modular components including individual web elements that can be attached to different truss positions, allowing workers to access various parts of the truss while maintaining safety. The web can be configured in segments to match the specific geometry of the truss structure.
2Reliability
If workers use personal protective equipment to secure themselves on trusses, then safety is improved, but work time and costs increase
Solution Approach 1:
The assembly web serves as a mediator that provides inherent safety through its design rather than relying on personal protective equipment. Workers can move freely on the web without being restricted by harnesses or other safety gear, significantly improving productivity while maintaining safety.
3Ease of operation
If assembly web is added to truss girder, then worker safety and mobility are improved, but device complexity increases
Solution Approach 1:
The assembly web is constructed from individual, modular web elements that can be independently attached to the truss girder. This segmentation allows for simplified assembly and disassembly of the web system, reducing the overall complexity of the combined structure while maintaining worker mobility benefits.
4Device complexity
If truss girders are spaced apart like rafters, then roof structure is simplified, but worker access between trusses becomes difficult
Solution Approach 1:
The assembly web merges the function of worker access with the existing truss spacing arrangement. By providing a continuous web platform that spans between or along the spaced truss girders, workers can easily move between trusses and perform tasks without requiring the trusses to be closer together or adding complex access structures.
Data Source
AI summary
The present invention relates to a lattice girder for holding a protective tarpaulin, which serves as a roof skin, of a weather protection roof, to which lattice girder there is fastened an assembly walkway which provides access for an assembly worker.