Installation manual
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floor-load
rating
of
345 kg/m2 (70 lb/ft2).
The
clearance
assumes
each
rack
has
a
maximum
weight
of
478
kg
(1,055
lbs).
The
dimensions
for
a',
b',
and
c'
vary
according
to
the
weight
configuration
and
the
floor-load
rating
of
your
facility.
Number
Left
Right
Rear
Front
of
Racks
a +
a'
b +
b'
c +
c'
d
1-4
1220
mm
1220
mm
760mm
1650
mm
(48 in.) (48
in.)
(30
in.)
(65
in.)
5
1525
mm
1525 mm
760mm
1650
mm
(60 in.) (60
in.)
(30
in.)
(65
in.)
6 1525
mm
1525 mm 915
mm
1650
mm
(60 in.)
(60 in.) (36
in.)
(65
in.)
Figure
3-4.
Weight
Distribution/Service
Clearance
for
Multiple
Racks
IBM
recommends
that
no
more
than
six
racks
be
adjacent
to
one
another.
This
ensures
that
the
maximum
one-way
walking
distance
for a
service
representative
will
be
5
meters
(16 ft)
when
he/she
works
on
anyone
unit.
If
you
alter
the
dimensions,
you
should
obtain
the
services
of
a
qualified
consultant
or
structural
engineer
to
determine
floor
loading.
If
the
review
of
the
floor-loading
does
not
require
the
weight
distribution
area
shown
in
Figure
3-3,
the
service
clearances
shown
in
Figure
3-5
are
required.
Left
(a)
Right
(b)
Rear
(c)
Front
(d)
1220
mm
1220
mm
760
mm
1650
mm
(48 in.) (48 in.)
(30 in.) (65
in.)
Figure
3-5.
Required
Service
Clearance
These
service
clearances
also
meet
the
office
environment
floor-loading
requirement
of
244 kg/m2 (50 lb/ft2)
for
a
single
rack.
3-5