HP 9000 rp5400 Servers - Manual (Page 153)

NOTE: An appropriate floor system consultant should verify any floor system under
consideration for an hp server installation.
Raised Floor Loading
Raised floor loading is a function of the manufacturer's load specification and the positioning of
the equipment relative to the raised floor grid. While Hewlett-Packard cannot assume
responsibility for determining the suitability of a particular raised floor system, it does provide
information and illustrations for the customer or local agencies to determine installation
requirements.
The following guidelines are recommended:
•
Because many raised floor systems do not have grid stringers between floor stands, the
lateral support for the floor stands depends on adjacent panels being in place. To avoid
compromising this type of floor system while gaining under floor access, remove only one
floor panel at a time.
• Larger floor grids (bigger panels) are generally rated for lighter loads.
CAUTION: Do not position or install any equipment cabinets on the raised floor system until
you have carefully examined it to verify that it is adequate to support the appropriate installation.
Floor Loading Terms
Table C-2 Floor Loading Term Definitions
Definition Term
The weight of the raised panel floor system, including the understructure. Expressed
in lb/ft2 (kg/m2). Dead load
The load that the floor system can safely support. Expressed in lb/ft2 (kg/m2). Live load
The load that a floor panel can support on a 1-in2 (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 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 hp 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 server.
Based on specific information provided by Hewlett-Packard, 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 hp installation.
Facility Characteristics 153