HP ProLiant DL20 Gen10 User Manual page 58

the installation, consider the following:
You must fully understand the static and dynamic load carrying capacity of the rack and be sure that it can
accommodate the maximum weight of the server.
Be sure sufficient clearance exists for cabling, installation and removal of the server, and movement of the rack
doors.
CAUTION: CAUTION:
Always plan the rack installation so that the heaviest item is on the bottom of the rack. Install the heaviest item first,
and continue to populate the rack from the bottom to the top.
Rack warnings and cautions 58