Machinery

calculated sound power test data or sound pressure test data as levels in

dB in the eight octave bands between 63 and 8,000 Hz. Refer sound power

levels to one pW and sound pressure levels to 20 uPa. Submit the overall

"A" weighted scale sound pressure level in dB. Submit the standard test

procedure used to obtain the sound power or pressure data for the

applicable vibration isolation equipment size.

1.4.3

Machinery

For each item of machinery, compare spring static deflections with the

specified minimum static deflection, to show that the calculated spring

static deflections are not less than the minimum static deflections

specified. Rated spring static deflections are not acceptable in lieu of

calculated spring static deflections. [When seismic protection is

required, substantiating calculations are required.]

1.4.4

Machinery Over 136 KilogramsMachinery Over 300 Pounds

For machinery items over 136 kg 300 pounds, provide calculations for shear,

pull-up, primary overturning, and secondary overturning.

1.4.5

Machinery Vibration Criteria

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NOTE: Include the vibration isolation schedule on

the drawings. Provide information in project

specifications, if drawings do not show the

vibration isolation schedule. Further details may

be found in the current ASHRAE System Handbook,

Chapter entitled "Sound and Vibration Control."

Refer to TABLES 1A and 1B for vibration isolator

selection. DO NOT INCLUDE THE ENTIRE TABLES 1A AND

1B IN THE PROJECT SPECIFICATIONS.

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NOTE: For equipment rooms containing

air-conditioning, heating, pumping and air

compressor equipment, review manufacturer's

recommendations for vibration and noise isolation

and seismic snubbing. When vibrating, rotating, or

pulsating machinery are to be located at other than

on grade, coordinate with the structural designer to

avoid problems caused by machinery induced

vibrations in the building structure. For heavy

vibrating machinery located anywhere, completely

review vibration isolation requirements. Coordinate

with the designer about the maximum allowable levels

of sound and vibration in equipment locations. Refer

to both the Applicable Publications and the

following publications for guidance in sound,

vibration isolation, and seismic restraint devices

for mechanical equipment and systems:

DM-3.14 - Power Plant Acoustics, December 1983

UBC - International Conference of Building Officials

Uniform Building Code, 1988

SECTION 15070N

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