HP Integrity rx7620 Server - User Service Guide, Sixth Edition

Table C-3 Floor Loading Term Definitions (continued)
DefinitionTerm
The load that a floor panel can support on a one square inch (6.45 cm2) area at the
panel’s weakest point (typically the center of the panel), without the surface of the
panel deflecting more than a predetermined amount.
Concentrated load
The maximum load (per floor panel) that the floor system can support without failure.
Failure expressed by floor panel(s) breaking or bending.Ultimate load is usually
stated as load per floor panel.
Ultimate load
The load a floor panel can support (without failure) when a wheel of specified
diameter and width is rolled across the panel.
Rolling load
Computed by dividing total equipment weight by the area of its footprint. This value
is expressed in lb/ft2 (kg/m2).
Average floor load
Average Floor Loading
The average floor load value, defined in Table C-4, is not appropriate for addressing raised floor
ratings at the floor grid spacing level. However, it is useful for determining floor loading at the
building level, such as the area of solid floor or span of raised floor tiles covered by the server
footprint.
Typical Raised Floor Site
This section contains an example of a computer room raised floor system that is satisfactory for
the installation of an HP Integrity rx7620 Server.
Based on specific information provided by HP, Tate Access Floors has approved its Series 800
all-steel access floor with bolt-together stringers and 24 in. (61.0 cm) by 24 in. (61.0 cm) floor
panels.
In the event that the flooring is being replaced or a new floor is being installed, Tate Access Floors
recommends its Series 1250 all-steel access floor with bolt-together stringers and 24 in. (61.0 cm)
by 24 in. (61.0 cm) floor panels be used to support the server installation.
NOTE: If the specific floor being evaluated or considered is other than a Tate Series 800 floor,
the specific floor manufacturer must be contacted to evaluate the floor being used.
Table C-4 lists specifications for the Tate Access Floors Series 800 raised floor system.
Table C-4 Typical Raised Floor Specifications
RatingItem
1
7 lb/ft2 (34.2 kg/m2)Dead load
313 lb/ft2 (1528.3 kg/m2)Live load
1250 lb (567 kg)Concentrated load
2
4000 lb (1814 kg) per panelUltimate load
400 lb (181 kg)Rolling load
500 lb (227 kg)Average floor load
1 From Table C-3 (page 191)
2 With 0.08 in. (0.2 cm) of span maximum deflection
Windows
Avoid housing computers in a room with windows. Sunlight entering a computer room can
cause problems. Magnetic tape storage media is damaged if exposed to direct sunlight. Also, the
heat generated by sunlight places an additional load on the cooling system.
192 General Site Preparation Guidelines