Template for report - BIMMEPAUS · BIM-MEPAUS 2 June 2016 ... are non-core data and can be managed...
Transcript of Template for report - BIMMEPAUS · BIM-MEPAUS 2 June 2016 ... are non-core data and can be managed...
BIM-MEPAUS SPECIFICATION Ductwork sound attenuators
Issued By: BIM-MEPAUS
30 Cromwell Street, Burwood 3205 VIC Australia
Revision: D
Date June 2016
BIM-MEPAUS Specification
Ductwork sound attenuators
BIM-MEPAUS i
June 2016
Acknowledgements BIM-MEPAUS acknowledges the contributions of those organisations involved in the development and review of this
specification including principal contributors:
Australian Chamber of Commerce and
Industry
A.G. Coombs Pty Ltd
A.G. O’Connor Pty. Ltd.
D&E Air Conditioning Pty Ltd
Watson Fitzgerald & Associates Pty Ltd
Fantech Pty Ltd
Formatting conventions
The following table shows text formats used in BIM-MEPAUS documentation and their application
Text Type Example Indicates
Italicised text BIM Execution Plan The generic title for a type of document
Bold italicized text BIM-MEPAUS specification The name of a referenced document
Red bold text LOD First reference to a term or abbreviation that is
defined in the website glossary under Practices
Blue text www.bimmepaus.com.au Hyperlink / web link
Blue italicised text Explanatory notes Explanatory notes or reference information.
Green bold text Future development Sections or documents that are still under
development by BIM-MEPAUS.
Keeping BIM-MEPAUS up-to-date
BIM-MEPAUS specifications, templates and content are updated to reflect changes in legislation, technology and
industry practice. Feedback and suggestions are welcome and can be made via the BIM-MEPAUS website. Updates
are managed and delivered through the BIM-MEPAUS website.
Liability Disclaimer
BIM-MEPAUS makes no warranty, expressed or implied, including but not limited to any implied warranties of
merchantability and fitness for a particular purpose, nor assumes any legal liability or responsibility for the accuracy,
completeness, or usefulness of the information in this document.
In no event shall BIM-MEPAUS or its agents be liable for damages or losses resulting from your use of, or reliance
on the information provided in this document.
COPYRIGHT © BIM-MEPAUS All rights reserved.
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Table of Contents
1 INTRODUCTION .............................................................................................................. 1
1.1 Scope ........................................................................................................................................................ 1
1.2 BIM-MEPAUS reference documents ............................................................................................................ 1
1.3 Objectives .................................................................................................................................................. 1
1.4 Model classification ................................................................................................................................... 1
2 REFERENCED STANDARDS .......................................................................................... 2
3 MODEL WORKFLOW ...................................................................................................... 3
3.1 Model Workflow ......................................................................................................................................... 3
3.2 Generic design model ................................................................................................................................ 3
3.3 Manufacturer certified model ..................................................................................................................... 3
3.4 Commissioned AS-Built model .................................................................................................................. 4
4 SHARED PARAMETER SCHEDULING ........................................................................... 5
5 ATTENUATOR SPECIFICATION ..................................................................................... 7
5.1 Attenuator insertion losses ........................................................................................................................ 7
5.2 Attenuator sizing ........................................................................................................................................ 7
5.3 Material selection....................................................................................................................................... 7
5.4 Pressure losses ......................................................................................................................................... 7
5.5 Connectors ................................................................................................................................................ 7
6 REVIT FUNCTIONALITY ................................................................................................. 8
6.1 Categories ................................................................................................................................................. 8
6.2 Functional type classification ..................................................................................................................... 8
6.3 Family naming syntax ................................................................................................................................ 8
6.4 Family/type version control ........................................................................................................................ 8
6.5 Omniclass .................................................................................................................................................. 9
6.6 Connector settings ..................................................................................................................................... 9
6.7 Family geometry ...................................................................................................................................... 10
6.8 Model visualization .................................................................................................................................. 10
7 PARAMETER SCHEDULES ...........................................................................................12
7.1 Identity Schedule ..................................................................................................................................... 12
7.2 BIM classification schedule ..................................................................................................................... 13
7.3 Performance/quality schedule ................................................................................................................. 13
7.4 Manufacturer schedule ............................................................................................................................ 16
7.5 Completion schedule ............................................................................................................................... 16
7.6 Generic design model schedule .............................................................................................................. 17
7.7 MCM Schedule ........................................................................................................................................ 18
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1 INTRODUCTION
1.1 Scope
This document sets out the BIM-MEPAUS specification for the following families:
Ductwork rectangular sound attenuators
Ductwork circular sound attenuators.
1.2 BIM-MEPAUS reference documents
This specification should be read in conjunction with the following specifications and documents:
BIM-MEPAUS Ducting systems, plant and equipment schedule – this Excel based schedule provides
the complete listing of ductwork systems, plant and equipment names as well as the system colour
schema.
BIM-MEPAUS Master Shared Parameter Schedule – this document provides the reference source for all
shared parameter names used within BIM-MEPAUS IFM Generic Design and manufacturer certified
model (MCM) content models together with the Revit MEP classification of each parameter and its
associated BIM-MEPAUS GUID.
BIM-MEPAUS Plant, equipment and fitting scheduling specification– this document sets out the
technical and workflow requirements in relation to shared parameter scheduling.
These documents can be accessed through the BIM-MEPAUS website.
1.3 Objectives
Benefits sought through the development and implementation of this BIM-MEPAUS specification include:
A structured approach to the specification and modelling of ductwork sound attenuators;
Reliable and accurate Design to Commissioned As-built workflows; and
Industry standardization delivering improved supply chain efficiency and reduced project costs and risks
to the client and project team.
1.4 Model classification
Attenuators covered by this standard are classified as duct accessories within Revit.
Within the BIM-MEPAUS plant, equipment and fitting classification system attenuators are classified as equipment.
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2 REFERENCED STANDARDS
There are a number of requirements in the National Construction Code as well as relevant Australian and
international standards that relate to attenuator design, selection and test methods.
Codes and Standards referenced in this specification include:
General requirements
NCC/ BCA : National Construction Code / Building Code of Australia
Air handling systems
AS 4254.2 - 2012 : Ductwork for air-handling systems in buildings - Part 2: Rigid duct.
AS 1668.1 -2015 : The use of ventilation and air conditioning in buildings – Part 1: Fire and Smoke
Control in multi-compartment buildings
AS 1668.2 -2015 : The use of ventilation and air conditioning in buildings – Part 2: Mechanical
Ventilation in buildings
Attenuators
BS 4718 : 1971 : Methods of test for silencers for air distribution systems
AS 1277 :1983 : Acoustics – Measurement procedures for ducted silencers
ISO 7235 : 2003 : Acoustics – Laboratory measurement procedures for ducted silencers and air-
terminal units – Insertion loss, flow noise and total pressure loss
ISO BS EN 7235:2009 : Acoustics. Laboratory measurement procedures for ducted silencers and air-
terminal units. Insertion loss, flow noise and total pressure loss
ASTM E477-06a : Standard Test Method for Measuring Acoustical and Airflow Performance of
Duct Liner Materials and Prefabricated Silencers
ASTM E477-13e1 : Standard Test Method for Laboratory Measurements of Acoustical and Airflow
Performance of Duct Liner Materials and Prefabricated Silencers
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3 MODEL WORKFLOW
3.1 Model Workflow
One of the fundamental aims of BIM-MEPAUS is to enable efficient BIM based workflows that see the design model
progressively refined through the design and construction process to ultimately deliver a completed commissioned
as-built record model.
A key step in this process is the change-out of the generic design components within the virtual construction model
with manufacturer’s certified model (MCM) components as part of the virtual construction build. These MCMs are
then able to be leveraged through construction, commissioning and facility management workflows.
3.2 Generic design model
BIM-MEPAUS generic design family content provides a catalogue of types that allow designers to spatially model to
LOD 300 as well as specify the attenuator’s performance and quality requirements for most HVAC applications.
The BIM-MEPAUS generic design models incorporate the shared parameters developed through industry
consultation that are considered necessary to schedule the quality and performance requirements for tendering and
procurement purposes.
Design firms can pre-populate their content library attenuator design families with their quality specification shared
parameter values in order to reduce repetitive data entry. This approach limits subsequent scheduling to only those
instance based geometry and performance parameters that are typically scheduled in specification equipment
schedules.
3.3 Manufacturer certified model
The virtual build develops the design model into the LOD 400 construction model and typically involves changing
out the design attenuator model with the manufacturer certified attenuator model. Where the manufacturer’s
attenuator model is BIM-MEPAUS compliant this can be easily completed.
Manufacturer’s attenuator models are preferably generated from the BIM-MEPAUS industry foundation models and
are single type families that provide the manufacturer specific instance based shared parameter data for the
attenuator to be supplied for the project.
BIM-MEPAUS certified manufacturer models are fully interchangeable with the generic design models and provide:
Accurate geometry
Performance data
Full BIM-MEPAUS Revit operability.
Where the data is not able to be provided by the manufacturer in Revit content - manufacturer’s shared parameter
data should be delivered in Excel format structured allowing the data to be imported by the specialist trade contractor
to their scheduling database or Revit Virtual Construction model.
As the MCM and supporting shared parameter schedule replaces the certified drawings and technical schedules
traditionally provided by manufacturers, the model accuracy should be no more, or less than, that provided by the
equivalent manufacturer’s certified drawing.
Manufacturer’s Certified Models should preferably include a link to a pdf or web page providing pre-commissioning
checklists for modellers and shop drawers to facilitate the proper incorporation of the component into the model as
well as providing the pre-commissioning check sheet for the project site team.
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3.4 Commissioned AS-Built model
The commissioned as-built model comprises the construction model updated to reflect any changes made during
the field installation.
Attenuators are rarely subject to commissioning or on-site testing with the possible exception of measurement of
design air flow pressure loss and hence there is no commissioning schedule provided for this family.
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4 SHARED PARAMETER SCHEDULING
The shared parameter schema has been developed to effectively support data requirements for design,
procurement and commissioning as well as life cycle asset management.
All BIM-MEPAUS plant and equipment models have the same schedule structure shown below.
Identity
BIM Classification
System Analysis
Green Building Properties
Performance / Quality
Manufacturer
Commissioning
Completion
System Analysis, Green Building Properties and Commissioning schedules are only included where applicable or
where they have been defined.
The schedules are progressively completed as the MEP services model progresses through design and virtual
construction to a fully completed Commissioned As-built component within the final model.
Schedule Section Generic Design / MCM
Model schedule
Schedule completion by
Identity Generic design model Designer / Manufacturer / Installer
BIM Classification Generic design model Designer
System Analysis Generic design model Designer
Green Building Properties Generic design model / MCM model Designer / Installer / Manufacturer
Performance /Quality Generic design model / MCM model Designer / Installer
Manufacturer MCM model Manufacturer
Commissioning MCM model Installer
Completion Schedule MCM model Installer
The identity and completion schedules must be completed for all components and once the value is defined is fixed
for the life project model.
It is expected that not all data will be carried in the Revit design or virtual construction model with non-core data
likely to be managed off model using scheduling databases and/or spreadsheets. This non-core data is commonly
required for the finalization of procurement, commissioning and facility management purposes.
Manufacturer BIM data must be supplied in a format that can be imported into a data management system and/or
Revit Virtual Construction model with suitable formats including:
MCM model with MCM Revit shared parameter schedule
MCM model and MCM Revit shared parameter schedule with core manufacturer data and supporting MCM
Excel File.
To allow efficient and reliable data exchanges, it is critical that the BIM-MEPAUS shared parameter names and
respective GUIDs be used.
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Parameters indicated in bold font are core Revit model data expected to reside in the model whilst those in italics
are non-core data and can be managed either in the Revit MEP model or off model in a scheduling database.
Parameters notated with the symbol have an industry defined set of allowable values or descriptions that are
listed in the master BIM-MEPAUS shared parameter schedule.
It is noted that BIM-MEPAUS compliant manufacturer’s certified models can be used for basis of design where deemed appropriate by the designer and/or where specific manufacturer plant and equipment is to be nominated.
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5 ATTENUATOR SPECIFICATION
The following guidance has been developed through industry consultation for the completion of the quality and
performance attenuator schedule.
5.1 Attenuator insertion losses
The test standard used for the determination of the attenuator performance has a significant bearing on the insertion
loss data.
Generally the ISO based standards are considered to provide more conservative insertion loss data.
For HVAC applications the key attenuator performance characteristics are considered to be the lower frequencies,
in particular the 63Hz and 125Hz insertion losses.
5.2 Attenuator sizing
Sizing is based on airway size for round attenuators and sheet metal (casing) size for rectangular attenuators.
Circular attenuators are typically designed to fit directly to the fan and hence are sized to match the standard fan
ring flange – they are therefore scheduled on airway size.
Rectangular attenuators are typically sized based on casing size and hence are scheduled on sheet metal size.
5.3 Material selection
The default material is galvanised sheet metal construction with alternatives including stainless steel.
Acoustic absorption material is generally specified to be glass wool 32kg/m3.
Where a vapour barrier is required a continuous acoustic membrane is generally considered preferable over a PET
based facing such as MylarTM which is difficult to fabricate with.
5.4 Pressure losses
Attenuator pressure loss is highly dependent on both its size and aspect ratio and hence the use of a family KT
value is generally not feasible. Pressure losses are calculated using laminar flow conditions and poor inlet conditions
can significantly impact on the installed pressure losses.
5.5 Connectors
Connectors are based on:
35 TDF frame connections
Rectangular Angle Iron
Round Flange
Insert nuts
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6 REVIT FUNCTIONALITY
6.1 Categories
All attenuator families are designated in Revit MEP as duct accessories.
6.2 Functional type classification
The design and manufacture models functional type and sub-type are:
Functional Type : Attenuator
Sub Type : Rectangular or Circular.
6.3 Family naming syntax
The attenuator family naming convention is as follows
Format:
Generic Design : <Functional Type>_< Sub-Functional Type>_<Generic>_<IFM>
MCM : <Functional Type>_< Sub-Functional Type>_<ManufacturerName>_<Type Descriptor>
Example:
Generic Design Model
Attenuator_Rectangular_Generic_IFM
or
Attenuator_Circular_Generic_IFM
Manufacturer Certified Model
Attenuator_Rectangular_Manufacturer Name_025L
or
Attenuator_Circular_Manufacturer Name_10KRT
6.4 Family/type version control
Family Identification parameters are used for source and version control and are embedded in the family
parameters. They do not appear in the BIM-MEPAUS shared parameter schedules for the family as they are not
intended to be generally modified by designers or constructors.
IFM / Generic Design – Multiple Type
Family Identification Unit /Type Sample Value
FamilyName Text Attenuator_Rectangular_ Generic_BMAIFM
Version Text 2016-01
CreatedOn Text 201607
CreatedBy Text BMA
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Manufacturer’s Certified Model – single type
Family Identification Unit /Type Value
FamilyName Text Attenuator_Rectangular_ Manufacturer Name_ RT
TypeName Text 10G
Version Text 2016-01
CreatedOn Text 20160831
CreatedBy Text Modelling Company Name
6.5 Omniclass
The BIM Classification Code is a Revit System Parameter.
System Parameter Unit /Type Value
OmniClassNumber Text 23.33.00.00.00
6.6 Connector settings
The following Revit connectors are applied to the model:
Rectangular Attenuator:
ID Connector System Placement Shape/Type Direction Calculation
Method
1 Inlet Duct GLOBAL Face TDF, Angle Iron Bi-directional Calculated
2 Outlet Duct GLOBAL Face TDF, Angle Iron Bi-directional Calculated
Circular Attenuator:
ID Connector System Placement Shape / Type Direction Calculation
Method
1 Inlet Duct GLOBAL Face Round Flange,
Nut Insert
Bi-directional Calculated
2 Outlet Duct GLOBAL Face Round Flange,
Nut Insert
Bi-directional Calculated
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6.7 Family geometry
Family Geometry is controlled by type based parameters with the intention that the modeller should not need to
modify the geometry of Generic Design Models or Manufacturer’s Certified Models.
It is noted that the Family Dimension Parameters are used to schedule those parameters that define the type (size
or capacity), with all detailed geometry dimensions listed separately under the Geometry Grouping.
Critical dimensions in relation to the model geometry are:
Rectangular Attenuator:
Sheet Metal Width;
Sheet Metal Depth;
Length
duct connections;
o TDF
o Angle iron
Circular Attenuator:
Internal Diameter;
Length;
duct connections;
o nut-sert
o matching flange
6.8 Model visualization
The industry foundation models (IFM) for rectangular and circular attenuators have different visualizations for the
levels of detail available in REVIT. These visualizations are indicated below.
3D Course
3D Medium
3D Fine
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2D Course
2D Medium
2D Fine
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7 PARAMETER SCHEDULES
The schedule structure and parameters were developed to meet the needs of the BIM-MEPAUS integrated project
delivery workflow as well as support asset life cycle requirements.
Refer to Section 4 - Shared Parameter Scheduling for a detailed overview of the intended use and application of
the schedules.
Parameter fields indicated in black bold text are provided with the generic design model.
7.1 Identity schedule
Figure 7.1 Identity Schedule
Design Parameters Unit / Type Sample Value
ComponentName Text M-ATT-10-1
SystemServed Text AHU-12
Location Text Level 10 Plantroom
ComponentStatus Text CAB
MCM Parameters Unit /Type Sample Value
Manufacturer Text Manufacturer Name
Model Text Model Name
ProductCode Text Product Code
SerialNumber Text Attenuator Serial Number
ManufacturerURL Text Manufacturers product URL
FM Parameters Unit /Type Sample Value
AssetIdentifier Text M –ATT-AHU-12-1
Barcode Text Barcode Number
RFID Text RFI Tag Number
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7.2 BIM classification schedule
The BIM Classification Codes are based on the OmniClass Construction Classification System (known as
OmniClass™ or OCCS) for the construction industry and Natspec.
Fig 7.2 BIM classification schedule
Parameters Unit /Type Sample Value
OmniClassNumber Text 23-33 49 21 17
OCCS_ElementNumber Text 21-04 30 50 50
OCCS_ElementName Text Ductwork Sound Attenuators
NATspecWorkSection Text 0745
Detailed definition of Products and Elements can be found at http://www.omniclass.org/tables.asp with the following
relevant codes noted:
NATspec’s Work Section classification system can be found at
www.natspec.com.au/Products_Services/listallworksection.asp .
7.3 Performance/quality schedule
The performance and quality schedule details the specified requirements for the attenuator – completion of the
schedule is generally considered equivalent to LOD 300 – LOD375.
The schedule brings together a number of typical specification section requirements including those related to
attenuator design and acoustic and airflow related performance parameters.
The Manufacturer’s certified model may overwrite some sections of the schedule replacing the design performance
requirements with submitted performance data.
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Figure 7.3.1 Rectangular attenuator performance/quality schedule
Parameter Unit/Type Sample Value
AttenuatorType Text Rectangular
Width mm 1200
Depth mm 600
Length mm 600
AirFlow L/s 1200
Pressure Loss Pa 50
ConnectorC1 Text TDF-35
ConnectorC2 Text TDF-35
PodOrientation Text Vertical
AttenuatorMaterialType Text Galvanised steel
ProtectiveCoatingType Text Epoxy
InsulationType Text Glass wool
InsulationFacingType Text None
InsertionLossType Text Static
InsertionLoss63Hz dB 3
InsertionLoss125Hz dB 5
InsertionLoss250Hz dB 8
InsertionLoss500Hz dB 15
InsertionLoss1000Hz dB 18
InsertionLoss2000Hz dB 15
InsertionLoss4000Hz dB 11
InsertionLoss8000Hz dB 8
TestStandard Text ISO7235 : 2003
BasisOfDesign Text Manufacturer Model Name
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Figure 7.3.2 Circular attenuator performance/quality schedule
Parameter Unit/Type Sample Value
AttenuatorType Text Circular
Diameter mm 600
Length mm 600
AirFlow L/s 1200
Pressure Loss Pa 50
ConnectorC1 Text Insert Nut
ConnectorC2 Text Insert Nut
Podded Yes/No Yes
AttenuatorMaterialType Text Galvanised steel
ProtectiveCoatingType Text Epoxy
InsulationType Text Glass wool
InsulationFacingType Text None
InsertionLossType Text Static
InsertionLoss63Hz dB 3
InsertionLoss125Hz dB 5
InsertionLoss250Hz dB 8
InsertionLoss500Hz dB 15
InsertionLoss1000Hz dB 18
InsertionLoss2000Hz dB 15
InsertionLoss4000Hz dB 11
InsertionLoss8000Hz dB 8
TestStandard Text ISO7235
BasisOfDesign Text Manufacturer Model Name
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7.4 Manufacturer schedule
Manufacturer’s schedules are completed by suppliers to confirm the detailed performance, quality and configuration
selections.
Figure 7.4.1 Manufacturers Schedule
Parameter Unit/Type Sample Value
AirwayFreeArea% Number 50
PerfFreeArea% Number 11
SplitterType Text Tapered
InsulationDensity kg/m3 32
Weight Number 100
7.5 Completion schedule
The completion schedule provides key asset and facility maintenance data and is standard for the BIM-MEPAUS
plant and equipment families:
Figure 7.5.1 – Completion schedule
Parameter Unit/Type Sample Value
Designer Text Designer Name
Installer Text Installer Member
Client Text Client Name
InstallationDate Text 2013-09-31
WarrantyStartDate Text 2014-03-31
WarrantyDurationMonths Integer 12
ExpectedServiceLifeYears Integer 25
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7.6 Generic design model schedule
The following schedule defines the generic design model shared parameter schedule (based on a rectangular
attenuator) and, indicated in bold, the default shared parameter values provided with the BIM-MEPAUS generic
design model.
Parameters Unit / Type Default / Sample Value
ComponentName Text Component Name
SystemServed Text System Name
Location Text Location Name
ComponentStatus Text DD
AttenuatorType Text Rectangular
Width mm 1000
Depth mm 600
Length mm 600
AirFlow L/s 0
Pressure Loss Pa 0
ConnectorC1 Text TDF-35
ConnectorC2 Text TDF-35
PodOrientation Text Vertical
AttenuatorMaterialType Text Galvanised steel
ProtectiveCoatingType Text None
InsulationType Text Glass wool
InsulationFacingType Text None
InsertionLossType Text Static
InsertionLoss63Hz dB 0
InsertionLoss125Hz dB 0
InsertionLoss250Hz dB 0
InsertionLoss500Hz dB 0
InsertionLoss1000Hz dB 0
InsertionLoss2000Hz dB 0
InsertionLoss4000Hz dB 0
InsertionLoss8000Hz dB 0
TestStandard Text ISO7235
BasisOfDesign Text None
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Designer Text Designer Name
Client Text Client Name
7.7 MCM schedule
The following schedule defines the MCM shared parameter schedule (based on a rectangular attenuator) and
representative sample values forming the basis of a completed as-built attenuator schedule.
Parameters Unit / Type Sample Value
ComponentName Text M_ATT_10-1
SystemServed Text AHU-12
Location Text Level 10 Plantroom
ComponentStatus Text CKD
Manufacturer Text Manufacturer Name
Model Text Model Name
ProductCode Text Product Code
SerialNumber Text Attenuator Serial Number
URL Text Manufacturers URL
AttenuatorType Text Rectangular
Width mm 1200
Depth mm 600
Length mm 600
AirFlow L/s 1200
Pressure Loss Pa 50
ConnectorC1 Text TDF-35
ConnectorC2 Text TDF-35
PodOrientation Text Vertical
AttenuatorMaterialType Text Galvanised steel
ProtectiveCoatingType Text Epoxy
InsulationType Text Glass wool
InsulationFacingType Text None
InsertionLossType Text Static
InsertionLoss63Hz dB 35
InsertionLoss125Hz dB 35
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InsertionLoss250Hz dB 35
InsertionLoss500Hz dB 35
InsertionLoss1000Hz dB 35
InsertionLoss2000Hz dB 35
InsertionLoss4000Hz dB 35
InsertionLoss8000Hz dB 35
TestStandard Text ISO7235
BasisOfDesign Text Manufacturer Model Name
Parameter Unit/Type Sample Value
AirwayFreeArea% Number 50
PerfFreeArea% Number 11
PodType Text Tapered
InsulationDensity kg/m3 32
Weight kg 100
Parameter Unit/Type Sample Value
Designer Text Designer Name
Installer Text Installer Name
Client Text Client Name
InstallationDate Text 2013-09-31
WarrantyStartDate Text 2014-03-31
WarrantyDurationMonths Integer 12
ExpectedServiceLifeYears Integer 25
END