Two-Post Rack Structure for Seismic Hardening and Cable Routing
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Solution Overview
Problem
Conventional two-post mounting racks are vulnerable to seismic events, bulky, consume large floor space, and are ineffective in routing cables through their footprint, leading to inefficiencies in space utilization and seismic spacing requirements.
Innovation Solution
A seismically hardened two-post mounting rack design featuring a frame with seismically hardened components, including closed cross-sectional frame uprights, cable guides, and a base assembly that allows cable routing through its footprint, and utilizes virtual vertical cable managers to optimize space usage between adjacent racks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional two-post mounting racks are used, then they provide basic equipment mounting functionality, but they are vulnerable to seismic events and consume large floor space
Solution Approach 1:
The rack is divided into modular components including frame uprights with closed cross-sections, base assemblies with seismic isolation elements, and cable management modules. This segmentation allows each component to be optimized for seismic performance while reducing overall material usage and floor space requirements.
Solution Approach 2:
The frame uprights transition from open to closed cross-sectional shapes, fundamentally changing the structural parameters to achieve superior seismic resistance with reduced weight and footprint. The base assembly incorporates seismic isolation parameters that allow the rack to withstand seismic events while occupying minimal floor space.
2Reliability
If seismic spacing requirements are implemented, then seismic safety is improved, but unused space is created between adjacent racks
Solution Approach 1:
Cable management transitions from horizontal routing between racks to vertical routing through the rack footprint. The base assembly includes openings that allow cables to pass through the vertical dimension, enabling space-efficient rack placement while maintaining seismic safety distances.
Solution Approach 2:
The base assembly serves multiple functions: it provides seismic isolation, enables cable routing through the rack footprint, and allows adjacent racks to be positioned closer together. This multi-functionality eliminates the need for dedicated seismic spacing while maintaining safety requirements.
3Ease of operation
If traditional cable routing methods are used, then cables can be routed externally, but they cannot be routed through the rack footprint
Solution Approach 1:
Instead of routing cables externally around the rack, the base assembly is designed with openings that allow cables to be routed through the rack footprint from below. This inverted approach to cable routing improves efficiency while utilizing previously wasted space.
Data Source
AI summary
A two-post mounting rack includes a frame bottom, a frame top, a pair of frame uprights interconnected between the frame bottom and the frame top, and a base assembly for supporting the frame bottom on a surface. One or more of the frame bottom, the frame top, the pair of frame uprights, and the base assembly are seismically hardened. Each frame upright has a closed cross-sectional shape. Each frame upright includes a flange with apertures adapted to provide a mounting location for cable management projections. The base assembly includes two separate end gusset members. Each end gusset member includes two corner gussets. Each corner gusset includes a floor plate and a riser plate. The two corner gussets in each end gusset member are connected by a bridge member. The frame top includes an upper cross-member and two lateral reinforcement plates.