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
15 to 56 kW
S-I
25.40
Over 56 kW
S-I
25.40
Cooling Towers and
NP
6.35
Evaporative Condensers
NM
8.89
Factory Assembled Air
AC and HV Units
(Note (2))
Suspended Units
Up to 3 3/4 kW
H
25.40
Over 3 3/4 kW
Up to 400 rpm
H
44.45
Over 401 rpm
H
25.40
Floor Mounted Units
Up to 3 3/4 kW
NP
6.35
NM
8.89
Over 3 3/4 kW
Up to 400 rpm
NM
8.89
Over 401 rpm
NM
8.89
Centrifugal Blowers
175 - 224 rpm
NM-B
8.89
225 - 299 rpm
NM-B
8.89
300 - 374 rpm
NM-B
8.89
375 - 499 rpm
NM-B
8.89
Over 500 rpm
NM-B
8.89
Tubular Centrifugal
and Axial Fans
(Note (2))
Suspended
H with deflections specified for
centrifugal blowers
Floor Mounted
Arrangements 1 & 9
NM
8.89
Utility Fans
(Note (2))
Suspended and
H with deflections specified for
centrifugal
SECTION 15070N
Page 50
Previous Page
