Lenovo NeXtScale nx360 M4 Installation And Service Manual page 14

Rack Safety Information, Statement 2
DANGER
• Always lower the leveling pads on the rack cabinet.
• Always install stabilizer brackets on the rack cabinet.
• Always install servers and optional devices starting from the bottom of the rack cabinet.
• Always install the heaviest devices in the bottom of the rack cabinet.
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IBM NeXtScale nx360 M4 Installation and Service Guide