prevent excessive noise (meet OSHA requirements).
Delete this paragraph if no engine-generator set
enclosure is needed.
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The engine-generator set enclosure shall be corrosion resistant and fully
weather resistant. The enclosure shall contain all set components and
provide ventilation to permit operation at Service Load under secured
conditions. Doors shall be provided for access to controls and equipment
requiring periodic maintenance or adjustment. Removable panels shall be
provided for access to components requiring periodic replacement. The
enclosure shall be capable of being removed without disassembly of the
engine-generator set or removal of components other than the exhaust
system. The enclosure shall reduce the noise of the generator set to
within the limits specified in the paragraph SOUND LIMITATIONS.
1.4.10
Vibration Limitation
The maximum engine-generator set vibration in the horizontal, vertical, and
axial directions shall be limited to 0.15 mm 6 mils (peak-peak RMS), with
an overall velocity limit of 24 mm/second 0.95 inches/second RMS, for all
speeds through 110% of rated speed.
1.4.11
Vibration Isolation
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NOTE: See TM 5-805-9, Power Plant Acoustics, and TM
5-805-4, Noise and Vibration Control For Mechanical
Equipment for vibration criteria. Vibration
isolation systems should be applied where vibration
transmitted through the genset support structure
produces (either directly or by resonant frequencies
of structural members) annoying or damaging
vibration in the surrounding environment. Select
the manufacturer's standard or provide the maximum
allowable vibration force where necessary to limit
the maximum vibration. Delete the vibration
isolation requirement for applications where
vibration does not affect the floor or foundation.
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[A vibration-isolation system shall be installed between the floor and the
base. The vibration-isolation system shall limit the maximum vibration
transmitted to the floor at all frequencies to a maximum of [_____] (peak
force).] [The engine-generator set shall be provided with a
vibration-isolation system in accordance with the manufacturer's standard
recommendation.] Vibration-isolation systems shall be designed and
qualified (as an integral part of the base and mounting system in
accordance with the seismic parameters specified. Where the
vibration-isolation system does not secure the base to the structure floor
or unit foundation, seismic restraints shall be provided in accordance with
the seismic parameters specified.
1.4.12
Seismic Requirements
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NOTE: Provide seismic requirements, if a Government
designer (either Corps office or A/E) is the
Engineer of Record, and show on the drawings.
SECTION 16263A
Page 31
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