tube covered with comparable bronze or stainless steel braid restraining
and pressure cover.
2.9
FLEXIBLE DUCT CONNECTORS
Provide flexible duct connectors fabricated in accordance with [SMACNA
Industry Practice] [SMACNA HVAC Duct Const Stds].
[2.10
SEISMIC SNUBBERS FOR EQUIPMENT
Factory-fabricated, omni-directional with factory set air gaps between 3 mm
1/8 inch minimum and 6 mm 1/4 inch maximum. Load capacity of each snubber
at 50 percent neoprene element deflection shall be [0.5g] [1.0g] minimum.
Provide replaceable neoprene elements [6 mm] [19 mm] [1/4 inch] [3/4 inch]
[_____] minimum thickness.
]2.11
PIPE GUIDES
Factory-fabricated. Weld steel bar guides to the pipe at a maximum radial
spacing of 60 degrees. The outside diameter around the guide bars shall be
smaller than the inside diameter of the guide sleeve in accordance with
standard field construction practice. For pipe temperatures below 16
degrees C 60 degrees F, provide metal sleeve, minimum 16 kg per cubic meter
one pound per cubic foot density insulation.
2.12
THRUST RESTRAINTS
Adjustable spring thrust restraints, able to resist the thrust force with
at least 25 percent unused capacity. The operating spring deflection shall
be not less than 50 percent of the static deflection of the isolation
supporting the machinery.
2.13
[SEISMIC PROTECTION COMPONENTS FOR [PIPING] [AND] [DUCTWORK]
[Section 15050N BASIC MECHANICAL MATRIALS AND METHODS.] [ SMACNA Seismic
Restraint Mnl.]]
PART 3
EXECUTION
3.1
INSTALLATION
3.1.1
Vibration and Noise Isolation Components
**************************************************************************
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 3A and 3B for vibration isolator
selection. DO NOT INCLUDE THE ENTIRE TABLES 3A AND
3B IN THE PROJECT SPECIFICATIONS.
**************************************************************************
Install vibration-and-noise isolation materials and equipment [as indicated
and] in accordance with machinery manufacturer's instructions.
SECTION 15070N
Page 30
Previous Page
