HP 3000 9X9/KS Site Preparation And Requirements Manual page 23

Office building floors are usually rated at 50 pounds per square foot (244 kilograms per square meter)
with an additional allowance of 20 pounds per square foot (98 kilograms per square meter) for
partitions. If you are planning for a large computer system, your computer room floor and/or raised
floor must be able to support 100 pounds per square foot (488 kilograms per square meter). Any
questions regarding the adequacy of floor construction should be referred to and evaluated by a
qualified structural engineer.
If you are planning to construct a raised floor, first consult with the Hewlett-Packard CE. The preferred
height for a raised floor above the main floor is 12 inches (30 centimeters) and the height should not be
less than 4.5 inches (11 centimeters).
In addition to determining the adequacy of the computer site floor,
ensure that all floors, stairs, and elevators which might be used when
the computer equipment is moved to its destination can support the
weight of both the computer equipment and the moving equipment.
Failure to comply can result in damage to the computer equipment.
If metal is used to construct the raised floor, ensure that there is a
common ground connection between the raised floor and main
floor to avoid possible build up of different voltage potentials.
Failure to comply can result in serious injury to personnel and/or
damage to equipment.
CAUTION
WARNING
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