Rack Cases 101

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What is Fragility Rating?

  • Fragility is measured in “G” units
  • One G unit is the measure of the force exerted on a body by the Earth’s gravitational pull. This is called G Force
  • Example: Twenty G units is 20 x the amount of force that the normal gravity of Earth puts on a body. If equipment is damaged just over these conditions, it has 20 G fragility
  • The higher the G force needed to damage an object, the less protection is needed from shock and vibration
  • Standard configurations of cases are available to protect equipment from 15-120+ G fragility

Know Your Equipment’s Weight

  • Know the weight of the equipment and accessories to be mounted in the frame
  • Weight and size of the equipment can quickly determine what cases can be used for the application
  • Rack case configurations are available for weights from 20-340 lbs
  • Custom solutions can be created for rack mountable equipment heavier than 340 lbs

Worldwide Standard Rack Unit Specification

  • Internal rack heights are measured in Units or Us sometimes called Rack Units (RUs)
  • One Rack Unit (1U) is equal to 1.75 inches (44.45 mm)
  • Example: a 5U case has a rack that is 8.75 inches (222.25 mm) tall
  • Electronics industry standard CEA-310E for vertical spacing on racks defines one U as the space taken up by three holes on the uprights of a rack (see diagram)

Pelican Hardigg Rack Cases

Three holes take up 1.25” plus .25” above and below for extra space between rack mountable components (totaling 1.75 inches)

General Features

Pelican General Features

Pelican General Features