Raised Floor Requirements; Estimating Required Floor Load Rating; Floor Covering Requirements - HP XP20000/XP24000 Manual

WARNING!
If metal is used in the construction of the computer room floor, ensure that there is a common ground
connection between it and the ground or floor that it is built on to avoid possible build up of different
voltage potentials. Noncompliance can result in serious injury to personnel and damage to equipment.
All computer room floors must meet the following requirements:
• The floor must be able to support the total weight of the equipment as well as localized weight at
each caster or foot of the equipment racks. For more information, see
load rating" on page 26.
• The surface of the floor must be covered or treated with conductive material. For more information,
see "Floor covering

Raised floor requirements

A common method of preparing an adequate floor for a computer room is to construct a raised floor
over the building floor.
A raised floor has these advantages:
• Allows weight to be spread evenly across the floor
• Allows cables to be run conveniently and unobtrusively under the floor
• Allows optimum distribution of conditioned air
Raised floors have the following additional requirements:
• Raised floor access ramps must not exceed a 10 degree slope.
• Use a 25 to 31 cm (10 to 12 inch) raised floor system for the most favorable room air distribution
system.
• Grid panels must be at least 45 x 45 cm (17.72 x 17.72 in).
• The floor must have a load rating between 300 and 500 kg per square meter (553 to 921.7 lb
per square yard, or 61.4 to 102.4 lb per square foot). Floor loading maximum at any point is
500 kg (1102.3 lb).

Estimating required floor load rating

To estimate the load rating for your floor, consider the total weight of these items:
• The disk array (see "Weights" on page 15)
• Other equipment
• Furniture such as desks, chairs, and storage cabinets
• Computer room personnel
• Moving equipment such as forklifts and dollies
The lower the floor load rating, the more clearance is required around the array to distribute the
equipment weight correctly. If your computer room is too small to allow for minimum required clearance
around the array, you may need to increase the floor load rating.

Floor covering requirements

HP recommends a tiled floor.
26 Site requirements for the HP Disk Arrays
requirements" on page 26.
"Estimating required floor