**************************************************************************
NOTE: The following serves only as a simplified
guideline, without considering different types of
the same kind of equipment. Delete items that are
not applicable.
**************************************************************************
TABLE 2A
Sound Data Schedule
Equipment
|
Maximum Sound Power Level (dB)_______________
| Octave Band Level Center Frequency (Hz)_________
_____________________|63
| 125 | 250 | 500 | 1000 | 2000 | 4000 | 8000
|
|
|
|
|
|
|
|
Air Handling Unit
| 94 | 90 | 89 | 89 |
89
|
84
|
82
|
79
|
|
|
|
|
|
|
|
Make-Up Air Fan
| 91 | 91 | 80 | 84 |
82
|
76
|
71
|
65
|
|
|
|
|
|
|
|
Air Conditioning Unit| 100 | 96 | 90 | 89 |
86
|
80
|
75
|
72
|
|
|
|
|
|
|
|
Boiler
| 75 | 72 | 72 | 75 |
76
|
63
|
55
|
50
|
|
|
|
|
|
|
|
Chiller
| 98 | 98 | 96 | 95 |
93
|
94
|
88
|
81
|
|
|
|
|
|
|
|
Cooling Tower
| 110 | 110 | 105 | 102 |
98
|
95
|
92
|
87
|
|
|
|
|
|
|
|
Air Compressor
| 90 | 89 | 92 | 93 |
92
|
92
|
90
|
81
|
|
|
|
|
|
|
|
Pump
| 85 | 80 | 82 | 82 |
80
|
77
|
74
|
72
|
|
|
|
|
|
|
|
Fan
| 55 | 50 | 48 | 47 |
48
|
46
|
42
|
37
1.4.7
Seismic Protection Criteria
**************************************************************************
NOTE: Protect electrical and mechanical machinery
installations in Seismic Zones 3 and 4 of the
Uniform Building Code Seismic Map. Horizontal force
factors of 1.00 are assigned to essential building
or structures. 0.60 factors are assigned to
non-essential buildings or structures. A
non-essential building or structure is one that does
not require complete operation of emergency or life
saving machinery to provide services after an
earthquake. An essential building or structure
requires these services of its restrained machinery.
**************************************************************************
Use a Horizontal Force Factor minimum [60 percent] [100 percent] of the
machinery weight considered passing through the machinery center of gravity
in any horizontal direction. Unless vibration isolation is required to
protect machinery against unacceptable structure transmitted noise or
vibration, protect the structure or machinery from earthquakes by rigid
structurally sound attachment to the load-supporting structure. Protect
each piece of vibration-isolated machinery with protected spring isolators
or separate seismic restraint devices. Determine by calculations the
number and size of seismic restraints needed for each machinery. Verify
SECTION 15070N
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