Modular Fall Arrest Safety Net with Choker Fitting
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Solution Overview
Problem
Conventional safety nets for fall arrest protection in engineering facilities are costly and obstructive, making them impractical for permanent installation due to facility construction and overhead obstructions, necessitating a more affordable and easily installable solution.
Innovation Solution
A safety net assembly comprising a wire mesh bag with integral eyes and an elongate line system, including a choker fitting and hook fastener, allowing for easy deployment and secure attachment to construction members, enabling flexible and efficient installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a suspended safety net is installed to span the entire overhead area, then fall arrest protection is provided, but the cost increases and obstruction is caused
Solution Approach 1:
The patent divides the safety net into modular units that can be independently installed and secured to construction members. Each module can be attached to individual columns or beams, allowing selective coverage of high-risk areas rather than requiring a complete overhead span, thus reducing obstruction while maintaining essential protection.
Solution Approach 2:
The safety net is configured to hang vertically from construction members rather than spanning horizontally across the entire overhead area. This dimensional change allows protection to be provided in a localized vertical zone, reducing the horizontal footprint and obstruction caused by traditional suspended nets.
2Reliability
If a suspended safety net is installed to span the entire overhead area, then fall arrest protection is provided, but manufacturing cost increases
Solution Approach 1:
The safety net is divided into smaller modular sections that can be manufactured independently and assembled on-site. This segmentation reduces manufacturing complexity and material requirements compared to producing a single large suspended net, thereby lowering manufacturing costs while maintaining protective functionality.
Solution Approach 2:
Instead of providing complete overhead coverage, the modular safety net implements protection only where specifically needed based on risk assessment. This partial coverage approach reduces the quantity of materials required and manufacturing costs while still providing adequate fall arrest protection for critical areas.
3Reliability
If a suspended safety net is installed to span the entire overhead area, then fall arrest protection is provided, but installation difficulty increases
Solution Approach 1:
The safety net is divided into modular units with standardized attachment mechanisms that can be independently installed on construction members. This segmentation allows workers to install smaller, more manageable sections rather than handling and installing a single large suspended net, significantly reducing installation difficulty and improving ease of operation.
Solution Approach 2:
The modular safety net components are pre-assembled with attachment hardware and connection points prepared in advance. This preliminary preparation allows for quick on-site installation by simply connecting the pre-assembled modules to construction members, rather than requiring complex on-site assembly of a large suspended net structure.
Data Source
AI summary
A fall arrest safety net assembly has the form of a bag constructed of wire mesh, with a closed end and an opposing open mouth about which a plurality of eyes are spaced. An elongate line has opposing first and second ends, first and second line portions of the line being disposed adjacent the first and second ends respectively, an intermediate portion of the line located between the first and second line portions. A choker fitting has two faces between which a plurality of openings extend, and an end fixture on the choker fitting. The first portion of the line is connected in a ring by the choker fitting, the first end being fixed to the end fixture, the first portion extending through the eyes for drawing the mouth closed, and the intermediate portion extending through the openings in the choker fitting.