Raised Floor Requirements; Raised Floor Cutout Specifications - HP StorageWorks XP12000 - Disk Array Site Preparation 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.

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). The maximum point floor loading is 500
kg (1102.3 lb).

Raised floor cutout specifications

Figure 2 and
Basically, position floor cutouts toward the center of the rack. The position may be off-center as long
as the cutout is within the allowable range and allows smooth entrance of an external cable (check
the relationship between the position of the cutout and the opening on the bottom of the rack).
Figure 3 show the locations of floor cutouts under the DKC and DKU, respectively.
XP12000 Disk Array Site Preparation Guide 27