TABLE 3A
Vibration Isolator Types and Minimum Static Deflection
(MSD, mm) for 100-200 mm slab on grade and column supported.
Column
Slab on earth
9.1-12 meters
12.1-15 meters
Spacing
and 0-9 meter
Equipment
Type
MSD
Type
MSD
Type
MSD
_________
(Note (1))
(Note (1))
(Note (1))
Floor Mounted
S-B with deflections specified for
Arrangements 1 & 9
centrifugal blowers
Utility Fans
(Note (2))
Suspended
H with deflections specified for
centrifugal blowers but not to exceed
69.85 mm
Floor-Mounted
S-R with deflections not specified for
centrifugal blowers but not to exceed
69.85 mm
High Pressure Fans
HR recommended for minimizing undesirable
(Over 1494 Pa
thrust effects
Static Pressure)
and Other
Machineries
Producing Thrust
(Note (2))
Internal
Engines and
Engine
Driven Equip
750 rpm and
S
38.10
S
63.50
S
88.90
over
Dimmer Banks and
Up to 454 kg
NM
8.89
NM
8.89
S
88.90
Over 454 kg
SV
25.40
SV
25.40
SV
25.40
NOTES: (1)
Equipment Vibration Isolation Schedule Designations
(Hyphenated designations are combinations of the following:)
B
- Welded structural steel bases.
H
- Spring isolators (suspended equipment and piping). Where
required, provide with adjustable preloading devices.
HR - Thrust restraints
SECTION 15070N
Page 43
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