Vibration Isolation and Restraint Systems - Vibro

Vibration Isolation and Restraint Systems
Labor-Savings Timeline
Vibration, Structure-Borne Noise,
& Seismic/Wind Effects
Labor-Savings
Timeline
1
Scope Discussion
to account for all products and labor
before the project starts and to
reduce scope overlap.
WIND LOAD
A
vibration path
isolation required
B
A
B
C
D
E
F
2
seismic/wind
sensitive areas
Kick Off Meeting
takes place after projects are
awarded to discuss project schedule,
urgent deliverables, and contractor
installation plans.
C
STRUCTURE-BORNE
NOISE
Vibration and noise problems go
hand-in-hand and are common
issues that engineers have to deal
with in HVAC.
3
Classroom Training
provided on larger projects to the
installation team by Vibro-Acoustics'
Field Engineers. The focus is on how to
install the product quickly and correctly.
D
F
E
Vibration problems are usually caused
by the moving and rotating mechanical
elements found inside HVAC equipment.
The source vibration, if not properly isolated,
can transfer to the structure and connected
piping or ductwork. Sometimes, occupants
Restraint Requirements
A
Are wind load calculations required?
B
Is the equipment adequately attached?
C
Are restraints required for ductwork?
D
Is there thermal expansion?
E
Which anchors are required?
F
What embedment and edge distance is
required ?
Achieving code compliance (e.g., IBC or
NBC) is crucial. Seismic and wind events
can induce damage from a building's nonstructural components, creating life-safety
issues and devastating loss of revenue. If
neither the design nor the construction
teams have adequate expertise in extreme
event engineering, an unacceptably high
degree of risk and liability may be borne by
both.
Our goal is to save
you labor.
of a room may only sense the vibrational
effect as something that’s felt, but inaudible.
In many cases, however, the vibration can
propagate and radiate as a low frequency
humming sound—this is known as
structure-borne noise.
Without a careful, methodical approach
to the proper selection and application
of vibration isolators, problems can arise
with significant consequences, including
additional costs, extra work, lost time, and
damage to professional reputations.
Traditional Practices
Traditional practices in vibration isolation selection don’t always allow for the best
solutions. One traditional approach is to rely on vibration isolation products that are
supplied by the HVAC equipment manufacturer. The downside to this approach is that
engineers can’t be sure that the end result will meet the design criteria. Proper isolator
selection and application depend greatly on the driving frequencies of the equipment
(especially equipment with variable speed drives), location and supporting structure
deflection, and surrounding and connected elements such as piping and ductwork.
When selecting isolators, the standard approach is to refer to the ASHRAE table; however,
industry knowledge is necessary in order to use this table to arrive at the best solution for
the system.
1 | VIBRO-ACOUSTICS VIBRATION ISOL ATION AND RESTRAINT SYSTEMS
For vibration isolation and restraint systems, what
cost should contractors carry for materials and labor?
How can contractors avoid scope and labor creep?
These are difficult questions to answer when systems
aren’t scheduled, locations aren’t determined, and
specifications are vague. It’s up to the contractor to
figure it all out.
The cost of labor is estimated to be 10 times the cost
of isolation and restraint material. Unfortunately, this
labor is also at risk of ballooning over the project
timeline. Reducing labor directly impacts the project
margin.
4
Project Management
is provided with a single point of contact to
help contractors achieve code compliance
with the least amount of labor.
5
Custom Engineering
is often required because standard
products are not always the most
economical to install. Vibro-Acoustics
has significant experience in this area.
6
Product Installation
At Vibro-Acoustics we have one focus when it comes
to vibration isolation and restraint systems—to
deliver labor savings to installing contractors. This is
our mantra. We have worked extensively on multiple
labor-saving programs across all customer facing
departments. Our Labor-Savings Timeline (right)
illustrates some of the ways we save our customers
labor when we partner together on projects.
of Vibro-Acoustics' products is the fastest
in the market. Our champion is the
BulletBraceTM cable restraint system.
7
Site Visits & Sign Off
will be provided by Vibro-Acoustics' Field
Engineers to ensure products have been
installed as per code and specification
requirements.
VIBRO-ACOUSTICS VIBRATION ISOL ATION AND RESTRAINT SYSTEMS | 2
Suspended Systems
Suspended
Systems
A key factor in effective piping and ductwork isolation and restraint is site planning and coordination before installation. For restraints, the first step is choosing between cable or rigid. Selecting the
proper restraint system requires a study of piping or ductwork placement, an examination of site
conditions—including wall and ceiling location and construction—and an understanding of the vibration isolation needs. If vibration isolation is required, then cable restraints should be used instead
of rigid restraints.
VAC: Rod Stiffener
Clamp
To keep hanger rods
from bending and
buckling due to seismic
activity, additional steel
angles are clamped
to them using VibroAcoustics’ easy-toinstall VAC rod stiffener
clamps.
Ductwork
SH: Spring Hangers
Vibro-Acoustics offers a variety of standard and custom isolation and
restraint solutions for duct systems. These solutions, combined with
our seismic engineering capabilities, give contractors and engineers the
advantage of single-source responsibility.
isolation products
NH / SH
restraint products
BB / BBR / VAC / RRK
NH: Neoprene
Hanger
This advanced element
design, which includes
12 unique neoprene
extrusions, achieves
desired deflections at
the rated loads. This
results in better acoustic performance of the
product.
BB
NH
Vibro-Acoustics' family
of spring hangers are
available in a variety
of load capacities and
configurations of rubber and springs.
Spring hangers are also
available with and without
rubber elements (SHR and
SH), bottom cups (SHB), both
elements and cups (SHRB), and
precompressed versions for all
four options (PSH, PSHR, PSHB,
and PSHRB). Uplift stopwashers
are provided for seismic
applications.
SHRB Spring Hanger shown
on right.
BB: BulletBraceTM
Adjustable Cable
Restraint System
Utilizing the uniquely
designed BulletLockTM
(patent pending) securing mechanism, the
BulletBraceTM is the
fastest adjustable cable
restraint system in the
market.
Piping
Restraining piping can pose a challenge due to limited room, high ceilings,
and a web of ductwork, piping, and electrical conduit. Vibro-Acoustics
provides on-site trade coordination and custom pipe stand designs that help
installing contractors achieve code compliance with minimal labor costs.
Piping systems have unique parameters to consider when selecting vibration isolation and seismic restraints, most notably different pipe materials
and thermal expansion and contraction.
isolation products
SH
restraint products
RRK / VAC / BB / BBR
RRK
RRK: Rigid
Restraints
The Vibro-Acoustics
RRK rigid restraint
brackets provide
installation savings,
post-equipment installation capability, and
a universal bracket
design that simplifies
product installation. For
more information, see
our RRK brochure.
Fan Coil Units, Heat Pumps & Terminal Units
Fans
In some cases, restraint of small suspended equipment can be unnecessary or handled by alternative means. Our design and engineering staff
can help specifying engineers create clear project-specific specifications
and help contractors determine the most cost effective methods to ensure code compliance, especially on projects with many terminal units.
Duct-mounted or suspended fans vary in size, configuration, and horsepower. These variables, coupled with location and application, will help
determine the correct isolation and restraint solution. Fans will often
require a solution for both airborne and structure-borne noise.
isolation products
NH / SH
isolation products
SH / AHCS Thrust Restraints / NH
restraint products
BB / BBR / VAC
restraint products
BB / BBR
BB
NH
VAC
SHRB
VAC
No matter what the site conditions require
(single clevis hung, trapeze, pipe stands,
etc.), Vibro-Acoustics can apply a vibration
isolation and restraint system that fits with
the preferred installation method.
3 | VIBRO-ACOUSTICS VIBRATION ISOL ATION AND RESTRAINT SYSTEMS
VIBRO-ACOUSTICS VIBRATION ISOL ATION AND RESTRAINT SYSTEMS | 4
BulletBrace™ and Seismically-Rated Floor-Mounted Isolators
Seismically-Rated
Floor-Mounted
Isolators
t h e fa s t e s t a d ju s ta bl e c a bl e r e s t r a in t s y s t e m
Vibro-Acoustics' BulletBrace TM cable restraint system is the
fastest adjustable cable restraint system on the market.
Thanks to the uniquely designed BulletLockTM (patent
pending) cable securing mechanism, our pre-assembled
BulletBrace kits can be secured quickly and easily.
Vibro-Acoustics' line of restraint spring isolators provide vibration
and restraint control for mechanical equipment such as chillers and
cooling towers.
SCSR-H: Seismic Restrained
Spring Isolators
Designed to withstand more
than 1g of lateral seismic
force, the SCSR-H is available
in multiple load ratings with one
standard height for installation.
The hot-dip galvanized finish
provides protection for outdoor
applications.
Powder-Coated SCSR
(for attachment to concrete
structure)
Robust Housing
The SCSR housing is composed of
formed components, creating a
robust unified frame when welded
together. This optimizes load
distribution and will provide a high
capacity for the housing itself.
Adjustable vs. Non-Adjustable
Unlike non-adjustable cable restraints, adjustable
cable restraints allow the installer to correct
minor cable tension problems without having to
replace or splice installed cable restraints.
This saves needless installation
time and cost.
Hot-Dip Galvanized SCSR
(for attachment to steel structure)
Just Slide and Secure
With BulletBraceTM, the cable length can be adjusted
quickly after installation to remove excess sag of the
cable. For the contractor, the adjustability eliminates
the need for reinstalling the cable, and the time
saved reduces the installer's labor.
BBR: BulletBraceTM with Retrofit Brackets
Vibro-Acoustics' BBR BulletBraceTM Retrofit
Kits meet various application requirements.
Designed specifically for ease of use in retrofit
jobs, our Retrofit Brackets provide even more
labor savings.
SFS: Seismic Free
Spring Isolators
Unlike FS isolators,
SFS isolators are
seismically-rated and
uniquely engineered to
withstand at least 1g of
lateral seismic force.
These isolators are
designed to limit vertical
and lateral equipment
movement caused by
earthquake or wind
loads.
Just Slide and Secure
Vibro-Acoustics knows contractors care
about labor savings. The BulletBrace™
offers significant labor savings over other
cable securing mechanisms to lower the
cost of installation.
SFS-1A and -2A isolators use springs that are precompressed
to ²/³ capacity. This reduces labor required to adjust the
springs since they are preloaded.
Step 1
Step 2
Step 3
Slide and Secure the cable
Tighten the Secure Screw
Insert the Lock Screw
5 | VIBRO-ACOUSTICS VIBRATION ISOL ATION AND RESTRAINT SYSTEMS
VIBRO-ACOUSTICS VIBRATION ISOL ATION AND RESTRAINT SYSTEMS | 6
Non-Suspended Systems
More Non-Suspended
Systems
Vibro-acoustics has a full line of isolation and restraint
mounts for all HVAC equipment. More importantly, we
have the expertise to apply these products and provide
solutions that achieve both the desired noise and
vibration control as well as code compliance.
Indoor Chillers
CSR: Restrained
Spring Isolators
To avoid excessive stress on piping connection during chiller maintenance,
restrained isolators should be selected. Factors such as exposure to a
seismic/wind event, location in the building, the noise/vibration criteria,
the rotating speed(s) of the equipment, quantity of mounting locations,
attachment method, and weight distribution are also required to correctly
select the appropriate mount.
isolation products
FLEX / CSR / RD
isolation/restraint products
SCSR
Vibro-Acoustics' CSRs
are designed to isolate
floor-mounted equipment that could fluctuate in weight during the
life of the product.
FLEX: Flexible
Connectors
Vibro-Acoustics' flex
connectors are applied
to piping connections
with HVAC equipment
that could be a vibration source.
AHCS/HCS: Thrust
Restraints
Vibro-Acoustics offers
thrust restraints with
both floor and wall
mounting brackets.
SFS: Seismic Free
Spring Isolators
FS: Free Spring
Isolators
FLEX
SCSR: Seismic Restrained Spring Isolators
Uniquely designed to withstand more than 1g of lateral seismic force, the SCSR is available in multiple
load ratings with one standard height for installation. Different attachment methods are available.
SCSR
For fan and pump
applications, SFS
seismic isolators are
ideal for extreme event
projects, while FS
non-seismic isolators
are suited to standard
projects.
SB: Steel Bases
CIB: Concrete
Inertia Bases
Vibro-Acoustics' base
offering includes standard and custom steel
and concrete bases for
all HVAC equipment.
SFS Isolator
FS Isolator
Base-Mounted Pumps
Base-Mounted Fans
Cooling Towers, Outdoor Chillers & Condensing Units
Base-mounted pumps normally require a concrete inertia base. Selection
and sizing of the base should ensure that the range of motion is limited
and provide the appropriate vibration isolation for the system. Housekeeping pad depth and size, exposure to extreme events, pump type,
horsepower, rpm, size, location in the building, and weight distribution are
contributing factors in selecting the appropriate isolator.
Depending on the application and type of base-mounted fan, either a
concrete or steel base could be required. A typical isolation solution is
a Vibro-Acoustics steel base in combination with FS isolators and thrust
restraints.
Avoid point loading and multiple roof penetrations. Vibro-Acoustics’ cooling
tower isolation platform is uniquely engineered to save significant project
cost with lowered architectural screens. The guaranteed acoustic package considerably reduces time and cost, and provides customers with
single-source responsibility for noise and vibration control, as well as cooling tower support.
isolation products
FLEX / CSR / FS / RD
isolation products
isolation products
CSR
isolation/restraint products
SFS / SCSR
isolation/restraint products SCSR / SFS
isolation/restraint products
SCSR
base products
CIB
base products
base products
Cooling Tower Platform / CTB / Steel Base
FS / HCS Thrust Restraint / CSR
SB / CIB / IFB
CIB Concrete
Inertia Base
Other available base types: Cooling tower base
(CTB); integral steel fan base (IFB); L-shaped
reinforced concrete inertia base (LCIB); and
T-shaped reinforced concrete inertia base (TCIB).
RD: Rubber-in-Shear
Mounts
Vibro-Acoustics' RD
rubber-in-shear mounts
are color-coded for
ease of installation and
identification.
FLEX
SCSR
Base Rail Steel Frame
HCS Thrust Restraint
SFS
CIB
SB
Restrained Isolator
FS
Cooling Tower
Platform Solution
7 | VIBRO-ACOUSTICS VIBRATION ISOL ATION AND RESTRAINT SYSTEMS
Above: Outdoor Chiller
Vibro-Acoustics can perform calculations for and provide seismicallyrated, perimeter base rail supporting steel frames for cooling towers
and other outdoor equipment.
VIBRO-ACOUSTICS VIBRATION ISOL ATION AND RESTRAINT SYSTEMS | 8
Non-Suspended Systems & Other Products
More Non-Suspended
Systems
SPS/SPSA: Seismic
Pipe Stands
N/NSN: Neoprene
Pads
SRB: Seismic
Restraint Bracket
Roof Piping and Duct
Vibro-Acoustics' SPS/
SPSA pipe stands are
pre-designed for over
1g of lateral seismic
force and are available
in both fixed and adjustable-height models.
This isolation pad with
integral load distribution plate provides highfrequency vibration isolation and is designed
to fit the system.
Vibro-Acoustics' series
of pre-engineered seismic brackets provide
a bracing solution for
tanks, AHUs, and other
HVAC equipment.
Site scheduling is critical when coordinating installation of roof piping
with pipe stands. The building code requires the stands to be connected
directly to the structure, and this can be a labor intensive and costly task
if the roof membrane is already installed. Vibro-Acoustics' seismic pipe
stands are designed with a removable pipe support strut to allow for quick
and easy roof membrane installation.
restraint products
Rooftop Units & Curb Mounted Fans
Rooftop units, primary sources of vibration problems, are often culprits of
non-compliance with background sound criteria. To avert a vibration or structure-borne noise problem, engineers should specify Vibro-Acoustics’ noise
control curb, which provides external vibration isolation, not just isolation of
the usual suspects inside the unit (fan, compressor, etc.). Rooftop units with
curbs require additional calculations and bracing for extreme events to secure
the two attachment planes: the unit to the curb, and the curb to structure.
The Vibro-Acoustics VCR curb for extreme event applications comes with the
necessary calculations, stamped by a PE/P.Eng.
SPS / SPSA
SIPS: Seismic Inline
Pump Stands
This patented design
saves installing contractors more than
40% compared to fieldfabricated solutions.
The pre-engineered
solution provides capacity of more than 1g
of lateral seismic force
and includes pre-drilled
holes for ANSI 125#
flanges.
SPS
isolation/restraint products
VCR / RTR / RC
VCR: Noise Control
Curb
Vertical Inline Pumps
Tanks (expansion, hot water, fuel, etc.)
Since many vertical inline pumps are not installed on a concrete inertia
base, restraining them for extreme events can be a challenge. Utilizing
Vibro-Acoustics' pre-engineered pump stands eases installation and ensures code requirements are met. These pump stands are also used with
spring hangers and cable restraints for suspended vertical inline pumps.
Tanks (such as expansion tanks) often do not have allocated mounting
"feet" for extreme event applications. Vibro-Acoustics' seismic mounting
brackets should be utilized at three to four locations around the base. Depending on the tank location and size, wall straps and custom tank cages
could be required.
Vibro-Acoustics offers
a fully integrated noise
and vibration control
curb, engineered for
the specific project
requirements and
criteria. To learn more,
visit our website to view
the brochure on this
solution.
VCR
isolation products
FLEX / NSN / SH
restraint products
SIPS / SRK
restraint products
Fit-the-System
Solutions
SRB
Other available curb types:
Standard Curbs (RC) and
Isolated Rails (RTR)
Not enough room to install a standard product? Does the standard product not solve
the problem? Has the site conditions changed last minute? Need to save labor on
installations? If you encounter any of these situations, you can contact Vibro-Acoustics
for fit-the-system solutions.
FLEX
Height-saving
bracket for
chiller isolation
Support for exhaust
muffler to accommodate
thermal contraction and
expansion
SIPS
NSN
9 | VIBRO-ACOUSTICS VIBRATION ISOL ATION AND RESTRAINT SYSTEMS
SRB
VIBRO-ACOUSTICS VIBRATION ISOL ATION AND RESTRAINT SYSTEMS | 10
Floating Riser Solutions and Seismic Inline Pump Stands
Floating Riser
Solutions
Seismic Inline
Pump Stands
Save up to 40% cost over field-fabricated
solutions with Vibro-Acoustics’ SIPS
Seismic Inline Pump Stands, which offer a
more convenient solution to support and
restrain vertical inline pumps.
Vibro-Acoustics’ floating riser solutions are
designed to address thermal growth and vibration
issues for vertical piping systems in a building.
Pipe risers undergo changes in temperature as chilled or
heated water enters the pipe. As the temperature changes, the
pipe expands or contracts. If the piping system is anchored
to the structure, the thermal growth or shrinkage will apply
stress on the pipe riser support points, potentially damaging
the building structure and pipe. It is also important to isolate
the pipe from the building structure in order to eliminate
unwanted noise and vibration paths. If required, seismic
considerations need to be taken into account to ensure the
piping system can withstand a seismic event.
FLOOR 3
 
Thermal
expansion and
contraction
FLOOR 2
SIPS: Seismic Inline Pump Stands
Vertical inline (VIL) pumps are increasingly
popular with design engineers and
contractors, as they tend to take up
less space in mechanical rooms. Since
these pumps are typically located close
to the floor, floor-mounted seismicallyrated supports are ideal when a seismic
restraint solution is required.
Vibro-Acoustics is an expert in designing thermal and seismic
solutions for vertical piping systems. Our spring riser supports
provide complete noise and vibration control and are designed
to allow controlled expansion and contraction of pipe risers.
Floating riser solutions fully isolate the piping system from
the structure with the use of spring isolators, eliminating high
pipe anchor loads at the floor supports. Vibro-Acoustics will
also specify the final load at the structure during the submittal
phase for each floor mount. For seismic applications, we will
consider lateral seismic loads in the design of the floating riser
system to achieve optimal performance.
Powder-Coated
Pump stands are powder-coated
enamel for corrosion protection
 
Thermal
expansion and
contraction
Bolt Holes
Cutouts are sized to
accommodate standard
class 150 flanges
Free Spring Isolator
with Top Plate
Vibration
Isolation Pads
Restrained Spring Isolator
Neoprene pads with
steel distribution
plates are available
as an option for
vibration isolation
FLOOR 1
Spring Hanger
SIPS Seismic Inline Pump Stands with neoprene pads
11 | VIBRO-ACOUSTICS VIBRATION ISOL ATION AND RESTRAINT SYSTEMS
Low-Profile SIPS Seismic Inline Pump Stands with
two SCSR seismically-restrained spring isolators
VIBRO-ACOUSTICS VIBRATION ISOL ATION AND RESTRAINT SYSTEMS | 12
Our Services
Vibro-Acoustics complements its full line of vibration isolation
and restraint products with our three-stage extreme event
engineering and application engineering service.
Step 1: At the Design Stage
Our Lay-in Service saves consultants, on average, 16
hours per project. We work with consultants as an
extension of their design team and provide them with a
complete set of customized bid documents for noise and
vibration control solutions (specifications, schedules,
and sectional drawings).
Step 2: Order and Submittal Coordination
Between our Project Managers and Design staff,
Vibro-Acoustics will provide:
• Order coordination
• Kick-off meetings (if required)
• Submittal and product scheduling
• Seismic & wind overturn calculations
• Mark-up of piping and ductwork for cable/rigid
restraint locations
• Structural analysis and design of custom restraint
solutions such as pipe stands, duct stands, racks, and
supports
• On-site training for installation teams and cost savings
• Vibration isolation selection
• Vibration analysis
• Custom product design
• Riser isolation
• Thermal expansion calculations
• PE/P.Eng. professional engineering stamps
Step 3: On-Site Coordination
Our numerous field service staff will work with
contractors to provide labor saving solutions and training,
coordinate between multiple trades, help installers
improvise and adapt to field conditions, and provide
sign-off letters that are required for occupancy permits.
13 | VIBRO-ACOUSTICS VIBRATION ISOL ATION AND RESTRAINT SYSTEMS
Vibro-Acoustics is able to provide
stamped calculations for seismic and
wind restraint selections in all 50 U.S.
states and all 10 provinces plus 3
territories of Canada.
www.vibro-acoustics.com
355 Apple Creek Blvd, Markham, Ontario, Canada L3R 9X7 1-800 565-8401
info@vibro-acoustics.com
Phone: (416) 291-7371
Fax: (416) 291-8049
Toronto
•
Nashville • Reno • New York • Houston
LIT-VISR-002