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))
TABLE 3B
Class II Vibration Isolator Types and Minimum Static Deflection
(MSD, mm) for basements below grade and floor slabs on earth
Equipment
Type (Note (1))
MSD
Absorption Refrigeration
NP
6.35
Machines
NM
8.89
Centrifugal Chillers
or Heat Pumps
Hermetic Type
NP
6.35
NM
8.89
Open Type
NM-I
8.89
Reciprocating Air or
Refrigeration Compressors
500 to 750 rpm
S
25.40
751 rpm and up
S
25.40
Reciprocating Chillers
or Heat Pumps
500 to 750 rpm
SV
25.40
751 rpm and up
SV
25.40
Packaged Boilers
NP
6.35
NM
8.89
Pumps
Closed Coupled
NP
6.35
Up to 5 1/2 kW
NM
8.89
Over 5 1/2 kW
S-I
25.40
Base Mounted
Up to 15 kW
S-I
25.40
SECTION 15070N
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