| | What is a Relay Rack?
A Relay Rack is a 2-post aluminum or steel structure with either EIA standard (round) mounting holes or universal (square) mounting holes. Relay Racks are also called 2-Post Racks or Open Bay Racks. The vertical holes spacing on Relay Racks are standardized for mounting Telco, or computer / network equipment. The height of almost all rack mountable computer / network equipment products are built to accommodate these EIA standard rack units. Each rack unit is approximately 1.75" in height, and most of this equipment is built to rack mount to network enclosures or 19" Relay Racks (from hole to hole). Relay Racks can also mount cantilever shelving for other non-rack mountable equipment. 19 Inch Relay Racks are designed to handle most rack mount equipment needs. | 
19" Relay Racks
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Relay Rack Benefits: - EIA Standard 19" Rack mounts most networking equipment
- Easily Installable
- No doors or panels to hinder air flow
- Compact shipping size
- Requires less real estate then a 4-Post Rack
- Wide availability of Relay Rack Accessories - cable management products, cantilever shelves, power strips, etc.
When a 4-Post Rack should be considered over a 2-Post Relay Rack: - Security - a locked enclosure would be required
- Stability - normally a 4-Post Rack has far more stability
- Because of their weight or center of gravity, some equipment can not be safely mounted to a 2-post rack
- Weight - 4-post racks can mount far more weight
- Some equipment require front & rear mounting
- Flooring may not allow bolting of a Relay Rack base
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