Juniper SRX5800 Hardware Manual page 222

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CAUTION: The weight of the card is concentrated in the back end. Be prepared
to accept the full weight—up to 13.1 lb (5.9 kg)—as you slide the card out of the
chassis.
When the card is out of the chassis, do not hold it by the ejector handles, bus
bars, or edge connectors. They cannot support its weight.
Do not stack cards on top of one another after removal. Place each one
individually in an electrostatic bag or on its own antistatic mat on a flat, stable
surface.
Figure 92: Removing a Card (IOC Shown, Other Card Types Similar)