Procedure
1. Find out the floor load rating of the location where you plan to install the
storage system.
Important: If you do not know or are not certain about the floor load rating of
the installation site, be sure to check with the building engineer or another
appropriate person.
2. Determine whether the floor load rating of the location meets the following
requirements:
v The minimum floor load rating that is used by IBM is 342 kg per m² (70 lb.
per ft²).
v Use the table to determine the required side, front, and rear weight
distribution area for the specified floor load rating. The side dimensions for
the weight distribution area have a maximum of 76.2 cm (30 in). If the side
dimensions required to meet a specified floor load rating are greater than the
maximum allowed, then the floor load rating is not listed in the table.
v The maximum per caster weight that is transferred to a raised floor tile is 450
kg (1000 lb.).
3. Using the following table, complete these steps for each storage system.
a. Find the rows that are associated with the storage system.
b. Locate the configuration row that corresponds with the floor load rating of
the site.
c. Identify the weight distribution area that is needed for that storage system
and floor load rating.
Note: If you are unsure about the correct placement and weight distribution
areas for your storage system consult a structural engineer.
Table 74. Floor load ratings and required weight-distribution areas
Configuration
a
Total weight of
configuration
b
Floor load rating,
kg per m
2
(lb per
ft
2
)
Weight distribution areas
c, d, e
Sides
cm (in.)
Front
cm (in.)
Rear
cm (in.)
Model 984 976 kg (2151 lb) 610 (125) 7.62 (3) 76.2 (30) 76.2 (30)
488 (100) 18 (7) 76.2 (30) 76.2 (30)
439 (90) 25 (10) 76.2 (30) 76.2 (30)
342 (70) 51 (20) 76.2 (30) 76.2 (30)
Model 984 and one
84E expansion
model
6
2014 kg (4441 lb) 610 (125) 15.3 (6) 76.2 (30) 76.2 (30)
488 (100) 38 (15) 76.2 (30) 76.2 (30)
439 (90) 56 (22) 76.2 (30) 76.2 (30)
342 (70) not supported not supported not
supported
Model 984 and two
84E expansion
models
6
2863 kg (6311 lb) 610 (125) 15.25 (6) 76.2 (30) 76.2 (30)
488 (100) 51 (20) 76.2 (30) 76.2 (30)
439 (90) 74 (29) 76.2 (30) 76.2 (30)
342 (70) not supported not supported not
supported
Chapter 6. Delivery and installation requirements 139
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