TABLE 3A
Vibration Isolator Types and Minimum Static Deflection
(MSD, inches) for 4-8 inch slab on grade and column supported.
Column
Slab on earth
31-40 feet
41-50 feet
Spacing
and 0-30 feet
Equipment
Type
MSD
Type
MSD
Type
MSD
_________
(Note (1))
(Note (1))
(Note (1))
Absorption
SV-R
1.0
SV-R
1.75
SV-R
2.75
Refrigeration
Machines
Centrifugal
Chillers or
Heat Pumps
Hermetic Type
SV-B
1.75
SV-B
2.5
SV-B
3.5
Open Type
SV-1
1.75
SV-I
2.5
SV-I
3.5
Reciprocating Air
or Refrigeration
500 to 750 rpm
S-R
1.75
S-R
2.5
S-R
3.5
751 rpm and up
S-R
1.5
S-R
2.5
S-R
3.5
Reciprocating
Chillers or
Heat Pumps
500 to 750 rpm
SV-R
1.75
SV-R
2.5
SV-R
3.5
751 rpm and up
SV-R
1.5
SV-R
2.5
SV-R
3.5
Packaged Boilers
SV
1.0
SV
2.5
SV-R
3.5
Closed Coupled
Pumps
Up to 7 1/2 hp
S-I
1.0
S-I
1.0
S-I
1.0
Over 7 1/2 hp
S-I
1.5
S-I
2.5
S-I
2.5
Base Mounted
Pumps
Up to 20 hp
S-I
1.5
S-I
2.5
S-I
2.5
20 to 75 hp
S-I
1.5
S-I
2.5
S-I
3.5
Over 75 hp
S-I
2.5
S-I
3.5
S-I
3.5
Cooling Towers and
SV with deflections specified for centrifugal
SECTION 15070N
Page 45
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