Allow clearance around the rack for maintenance. When mounting a device in an enclosed rack ensure adequate ventilation. An enclosed rack should never be overcrowded. Make sure that the rack is not congested, because each unit generates heat. When mounting a device in an open rack, make sure that the rack frame does not block the intake or exhaust ports.
If the rack contains only one unit, mount the unit at the bottom of the rack.
If the rack is partially filled, load the rack from the bottom to the top, with the heaviest component at the bottom of the rack.
If the rack contains stabilizing devices, install the stabilizers prior to mounting or servicing the unit in the rack.