NOTE: Designer will indicate on the drawings where
equipment should be mounted resiliently. Details
for proper mounting of equipment will be indicated
on the drawings. Designer will insert required
isolation efficiency in the blank space for
installations where specific values for reduction of
noise and vibration transmission are necessary;
otherwise the sentence will be deleted. For areas
where the maximum tolerable transmissibility in
percent is considered necessary, the isolation
efficiency will be given. Recommended
transmissibility in percentages is as follows: 10
percent for equipment mounted in very critical
areas, 10 to 20 percent for critical areas, and 20
to 40 percent for noncritical areas. The drawings
should be checked to ensure that all structural and
equipment connection factors or conditions
surrounding the equipment, which are to be provided
with vibration isolation units, favorably influence
the effectiveness of the isolators. Where many
items of equipment require different transmission
values because of different equipment locations, the
specification may be revised to indicate the
appropriate values on the drawings.
Delete submittal of vibaration-absorption features
when not required.
**************************************************************************
Mechanical equipment, including compressors and pumps, shall be isolated
from the building structure by approved vibration-absorbing features unless
otherwise shown. Each foundation shall include standard isolation units as
indicated. Each unit shall consist of machine and floor or foundation
fastening, together with intermediate isolation material, and shall be a
standard product with printed loading rating. Piping connected to
mechanical equipment shall be provided with flexible connectors. Isolation
unit installation shall limit vibration to [_____] percent of the lowest
equipment rpm.
3.17.1
Tank or Skid Mounted Compressors
Floor attachment shall be as recommended by compressor manufacturer.
Compressors shall be mounted to resist seismic loads as specified in
Section 15070A SEISMIC PROTECTION FOR MECHANICAL EQUIPMENT.
3.17.2
Foundation Mounted Compressors
[Foundation attachment shall be as recommended by the compressor
manufacturer.] [Foundation shall be as recommended by the compressor
manufacturer, except the foundation shall weigh not less than three times
the weight of the moving parts.] Compressors shall be mounted to resist
seismic loads as specified in Section 15070A SEISMIC PROTECTION FOR
MECHANICAL EQUIPMENT.
3.18
WATER HEATERS AND HOT WATER STORAGE TANKS
3.18.1
**************************************************************************
SECTION 15405A
Page 100
Previous Page
