IBM BladeCenter T Type 8730 Hardware Maintenance Manual page 130

Statement 4
≥18 kg (37 lbs) ≥32 kg (70.5 lbs) ≥55 kg (121.2 lbs)
CAUTION:
Use safe practices when lifting.
Statement 5
CAUTION:
The power control button on the device and the power switch on the power
supply do not turn off the electrical current supplied to the device. The device
also might have more than one power cord. To remove all electrical current
from the device, ensure that all power cords are disconnected from the power
source.
Statement 10
CAUTION:
Do not place any object weighing more than 82 kg (180 lbs.) on top of
rack-mounted devices.
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BladeCenter T Type 8720 and 8730: Hardware Maintenance Manual and Troubleshooting Guide