Here are guidelines on how to determine the Server Rack size you need:
Measure all the equipment you plan to place in the rack.
Figure out the layout. If possible, make a 3D layout to visualize the scheme and identify possible errors.
Judging by the layout, calculate the height, width, and depth of the required cabinets.
When choosing a width, make sure the mounting rail is just wide enough to hold and support the hardware.
Important Notes to Consider
Note that there are several rules that must be followed when defining the required server rack size:
System administrators always leave free space in the cabinet. When calculating dimensions, add a quarter of the figure (or even half the size) to ensure an extra room. This is done for two reasons:
Network systems typically scale over time. As a result, workers left extra room for additional equipment to be installed in the future.
Adequate cooling and free air circulation. The devices are never placed too tightly together; otherwise, they exchange the heat they generate and overheat quickly. Space is required between the operating units.
Forecast ventilation systems when sizing server racks. In the case of an open rack, natural airflow is sufficient to cool the hardware. If it is an enclosed design, please allow space for the fan to be installed.
Consider cable management. How and where will the wires be wired?
Modern manufacturers produce different types of furniture. Network rack sizes vary widely. A model can be selected for any system and room. However, be sure to foresee all aspects in order to arrange the best possible system and ensure its smooth, uninterrupted operation.