IBM 8408-44E Site And Hardware Planning page 106

v The rack or cabinet must be capable of supporting an average load of 15.9 kg (35 lb) of product weight
per EIA unit.
For example, a four EIA drawer has a maximum drawer weight of 63.6 kg (140 lb).
The following rack hole sizes are supported for racks where IBM hardware is mounted:
– 7.1 mm plus or minus 0.1 mm
– 9.5 mm plus or minus 0.1 mm
v All parts that are shipped with the Power Systems products must be installed.
v Only ac power drawers are supported in the rack or cabinet. It is strongly recommended to use a
power distribution unit that meets the same specifications as IBM power distribution units to supply
rack power (for example, feature code 7188). Rack or cabinet power distribution devices must meet the
drawer voltage, amperage, and power requirements, as well as that of any additional products that are
connected to the same power distribution device.
The rack or cabinet power receptacle (power distribution unit, uninterruptible power supply, or
multi-outlet strip) must have a compatible plug type for your drawer or device.
v The rack or cabinet must be compatible with the drawer-mounting rails. The rail-mounting pins and
screws should fit securely and snugly into the rack or cabinet rail-mounting holes. It is strongly
recommended that the IBM mounting rails and mounting hardware that are included with the product
be used to install it in the rack. The mounting rails and mounting hardware that are provided with
IBM products have been designed and tested to safely support the product during operation and
service activities as well as to safely support the weight of your drawer or device. The rails must
facilitate service access by allowing the drawer to be safely extended, if necessary, forward, backward,
or both. Some rails, with IBM features for non-IBM racks, provide drawer-specific anti-tip brackets, rear
lock-down brackets, and cable management guides that require clearance on the rear side of the rails.
Note: If the rack or cabinet has square holes on the mounting flanges, a plug-in hole adapter might be
required.
If non-IBM rails are used, the rails must be product-safety certified for use with the IBM products. At a
minimum, mounting rails must be able to support four times the maximum rated product weight in its
worst-case position (fully extended front and rear positions) for one full minute without catastrophic
failure.
v The rack or cabinet must have stabilization feet or brackets installed both in the front and rear of the
rack, or have another means of preventing the rack/cabinet from tipping while the drawer or device is
pulled into its extreme front or rear service positions.
Note: Examples of some acceptable alternatives: The rack or cabinet might be securely bolted to the
floor, ceiling or walls, or to adjacent racks or cabinets in a long and heavy row of racks or cabinets.
v There must be adequate front and rear service clearances (in and around the rack or cabinet). The rack
or cabinet must have sufficient horizontal width clearance in the front and rear to allow the drawer to
be fully slid into the front and, if applicable, the rear service access positions (typically this requires
914.4 mm (36 in.) clearance in both the front and rear).
v If present, front and rear doors must be able to open far enough to provide unrestrained access for
service or be easily removable. If doors must be removed for service, it is the customer's responsibility
to remove them before service.
v The rack or cabinet must provide adequate clearance around the rack drawer.
v There must be adequate clearance around the drawer bezel so that it can be opened and closed,
according to the product specifications.
v Front or rear doors must also maintain a minimum of 51 mm (2 in.) front, 203 mm (8 in.) rear, door to
mounting flange clearance, and 494 mm (19.4 in.) front, 571 mm (22.5 in.) rear, side-to-side clearance
for drawer bezels and cables.
v The rack or cabinet must provide adequate front-to-back ventilation.
90
Site and hardware planning