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BIM-MEPAUS SPECIFICATION

Air handling system metal ductwork

Issued By: BIM-MEPAUS

30 Cromwell Street, Burwood 3205 VIC Australia

Revision: WIP REV D

Date October 2016

BIM-MEPAUS Specification


BIM-MEPAUS Page 2 June 2016

Acknowledgements BIM-MEPAUS acknowledges the contributions of the following organisations involved in the development of this

document:

BIM-MEPAUS acknowledges the contributions of those organisations involved in the development and review of this

specification including principal contributors:

Arups

A.G. Coombs

BSA

D&E Air conditioning

Ductmakers

Kavanagh Industries

TinMen SA

Triple M Mechanical

O’Connors

RolaDuct

Watson Fitzgerald & Associates

Norman Disney & Young

Formatting conventions

The following table provides the text formats used in BIM-MEPAUS documentation and their application:

Text Type Example Indicates

Italicized text BIM Execution Plan The generic title for a type of document.

Bold italicised text BIM-MEPAUS Specification The name of a referenced document.

Dark red 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 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 via 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 assume 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 the use of, or reliance on

the information provided in this document.

COPYRIGHT © BIM-MEPAUS

All rights reserved.

http://www.bimmepaus.com.au/




Table of Contents

1 INTRODUCTION .............................................................................................................. 1

1.1 Scope .......................................................................................................................................... 1

1.2 References ................................................................................................................................. 1

1.3 Objectives ................................................................................................................................... 1

2 DUCTWORK STANDARDS ............................................................................................. 2

3 DUCTWORK MODELS .................................................................................................... 3

3.1 Model workflow ........................................................................................................................... 3

3.2 System schematics ..................................................................................................................... 3

3.3 Services coordination plan.......................................................................................................... 3

3.4 Design ductwork model .............................................................................................................. 4

3.5 Construction ductwork model ..................................................................................................... 4

3.6 As-built ductwork model.............................................................................................................. 4

4 DUCTWORK SPECIFICATIONS ...................................................................................... 5

4.1 Ductwork standards .................................................................................................................... 5

4.2 Ductwork sizes ............................................................................................................................ 5

4.3 Ductwork materials ..................................................................................................................... 5

4.4 Pressure ratings .......................................................................................................................... 5

4.5 Design parameters ..................................................................................................................... 5

4.6 Air leakage .................................................................................................................................. 5

5 SYSTEMS, SERVICES AND SPECIFICATIONS ............................................................. 6

5.1 Systems, services and specifications ......................................................................................... 6

5.2 Service types .............................................................................................................................. 6

6 DUCTWORK SYSTEMS .................................................................................................. 7

7 DUCTWORK SPECIFICATIONS ...................................................................................... 8

8 DUCTWORK SERVICES ................................................................................................. 9

9 RECTANGULAR DUCTWORK .......................................................................................10

9.1 General ..................................................................................................................................... 10

9.2 Standard connectors ................................................................................................................. 10

9.3 Internal linings ........................................................................................................................... 10

9.4 Rectangular straights ................................................................................................................ 10

9.5 Rectangular fittings ................................................................................................................... 10

9.6 Rectangular accessories .......................................................................................................... 10

10 ROUND DUCTWORK .....................................................................................................11

10.1 General ..................................................................................................................................... 11

10.2 Sizes ......................................................................................................................................... 11

10.3 Straights .................................................................................................................................... 11

10.4 Fittings ...................................................................................................................................... 11




10.5 Accessories .............................................................................................................................. 11

11 OVAL DUCTWORK.........................................................................................................12

11.1 General ..................................................................................................................................... 12

11.2 Straights .................................................................................................................................... 12

11.3 Fittings ...................................................................................................................................... 13

11.4 Accessories .............................................................................................................................. 13

12 DUCTWORK SHARED PARAMETERS ..........................................................................14

ANNEXURE A – Ductwork legend and annotation

ANNEXURE B – Rectangular duct standard templates

ANNEXURE C – Round duct standard templates

ANNEXURE D – Oval duct standard templates

ANNEXURE E – CID Standard option settings




1 INTRODUCTION

1.1 Scope

This document sets out the BIM-MEPAUS specification for air handling system metal ductwork comprising:

Rectangular sheet metal ductwork

Round spiral wound metal ductwork

Oval spiral wound metal ductwork.

1.2 References

This specification should be read in conjunction with the following documents:

BIM-MEPAUS Airside systems, plant and equipment schedule – this Excel based schedule provides

the complete listing for all 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 the BIM-MEPAUS generic design and MCM models – this Excel

formatted schedule also provides the Revit classification for each parameter and its associated GUID.

BIM-MEPAUS Ductwork lining and insulation wrap specification – this specification sets out the

technical specification and modelling workflows for ductwork linings and insulation wraps.

BIM-MEPAUS Damper specification – this specification sets out the technical specification and modelling

workflows for ductwork general purpose, smoke and fire dampers.

BIM-MEPAUS Flexible ductwork specification – this specification sets out the technical specification and

modelling workflows for flexible ductwork.

BIM-MEPAUS Ductwork fire resistance paints, wraps and sprays specification – this specification sets

out the technical specification and modelling workflows for ductwork fire resistant paints, wraps and sprays.

These documents can be accessed through the BIM-MEPAUS website.

1.3 Objectives

Benefits sought through the development and implementation of the standard include:

A structured approach to the speciation and modelling of ductwork systems, services and specifications;

Reliable Design-to-Fabrication and Design-to-Commissioned As-Built workflows; and

Industry standardisation delivering improved supply chain efficiency, reduced project risks and cost.




2 DUCTWORK STANDARDS

There are a number of requirements in the National Construction Code and referenced standards that relate to

sheet metal ductwork design, fabrication and installation.

Standards considered relevant to mechanical services ductwork include:

General Requirements

NCC/ BCA : National Construction Code / Building Code of Australia

AS 1074.4 : Structural Design Actions Part 4 Earthquake Actions in Australia

Ductwork

AS 4254.1 - 2012 : Ductwork for air-handling systems in buildings - Part 1: Flexible duct

AS 4254.2 - 2012 : Ductwork for air-handling systems in buildings - Part 2: Rigid duct

AS 1668.1 - 2015 : The use of ventilation and airconditioning in buildings – Part 1: Fire and Smoke

Control in multi-compartment buildings

AS 1668.2 - 2012 : The use of ventilation and airconditioning in buildings – Part 2: Mechanical

Ventilation in buildings

Fire Dampers

AS 1682.1 - 2015 : Fire, Smoke and Air Dampers Part 1: Specification

AS 1682.2 - 2015 : Fire, Smoke and Air Damper Part 2: Installation

Insulation

AS 4426 - 1997 : Thermal Insulation of pipework, ductwork and equipment – Selection,

installation and finish

AS 4508 - 1999 : Thermal resistance of insulation for ductwork used in building air conditioning

Testing

AS 1530.3 - 1999 : Methods of fire tests on building materials, components and structures -

Simultaneous determination of ignitability, flame propagation, heat release and

smoke release

AS/NZS 4859.1 - 2002 : Materials for the thermal insulation of buildings - General criteria and technical

provisions

UL 181 : Factory-Made Air Ducts and Air Connectors.

In addition to the above standards, this specification incorporates the Insulation Council of Australia and New

Zealand’s recommended specifications for ductwork internal linings and insulation wraps developed in conjunction

with BIM-MEPAUS.

http://www.saiglobal.com/online/Script/Details.asp?DocN=AS967019572144

http://www.saiglobal.com/online/Script/Details.asp?DocN=AS967019572144




3 DUCTWORK MODELS

3.1 Model workflow

One of the principle aims of BIM-MEPAUS is to enable efficient Design to As-Built BIM workflows that see the

design model progressively developed through the design, virtual build and construction process to ultimately

deliver a completed As-built Model to the client.

The standard also supports the Design to Fabrication workflow that sees the Revit ductwork construction model

converted to either a Fabrication ITM Model or exported directly to MAJ file format for pricing and manufacture.

A key step in both workflows is the virtual build that sees the design ductwork services developed to a fully

coordinated constructible layout prior to issue for fabrication. This construction model is also used to drive site

layout, procurement and installation scheduling activities as well as commissioning BIM to field processes.

3.2 System schematics

Prior to modelling commencing, ducting system design should start with the development of the system schematics,

compartmentation and functional control strategies. These are key to conveying the design intent and are also the

starting point for the modelling of the ductwork layouts.

Best practice air side schematics convey the system architecture and include:

Building Levels / Compartmentation

Smoke and fire rated walls

Duct sizes and design air flows

Monitoring and control strategies

Pressure Zones within the system.

The BIM-MEPAUS template is not intended to generate the schematic from the design model and it is envisaged that

schematics will continue to be prepared in AutoCAD for the foreseeable future.

3.3 Services coordination plan

Prior to modelling commencing, the services coordination plan should be documented using constructible level

ductwork and piping elements and fittings to resolve:

The services zones

The clash avoidance rules that govern which services give way under various clash scenarios.

The services coordination plan should be included in all services packages and form a key deliverable of schematic

design phase independent of any LOD definition deliverable.

BIM As - Built

Model LOD 500 BIM Design Model

LOD 100 - 300 BIM Construction

Model LOD 400

CAM Fabrication

Model LOD 400

Virtual

Build

Fabrication Export




3.4 Design ductwork model

The BIM-MEPAUS Revit® Template add-in allows engineers and modellers to design and specify systems using

constructible Revit family based ducting services that incorporate relevant Australian standards and industry based

manufacturing practices.

BIM-MEPAUS design ductwork models nominate both the system and required ductwork service and specification

and are typically modelled in BIM-MEPAUS constructible Revit families that are built to match the corresponding BIM-

MEPAUS Revit Fabrication Parts.

The use of BIM-MEPAUS constructible services allows a range of engineering calculations and checks to be

completed with greater accuracy. The aim is to support the following engineering tasks:

System air flow rate calculations

Air velocity checks

Estimated static pressure losses

System specification checks.

3.5 Construction ductwork model

BIM-MEPAUS construction models provide construction level detailing using Revit Fabrication Parts and

manufacturer certified content.

The virtual build of the design model to create the LOD 400 construction model delivers a model that is fully

designated in terms of system type, service and specification. When read in conjunction with the duct fabricator’s

manufacturing specifications the model should provide sufficient detail for approval submissions.

The virtual build typically involves a number of tasks:

Changing-out of the design content with manufacturer’s certified content for end of line plant and

equipment such as fan coil units and fans, etc

Conversion of the ductwork system modelled in Revit family based service into Revit Fabrication Parts

based services.

Value Engineering to optimise the most cost effective service and layout within specification

Checking costs against original estimates and/or budget

Final services coordination and routing

System engineering checks including pressure loss and ductwork leakage calculations for fan selections

Piece marking and fabrication.

Once the construction model is finalized and approved, the Revit Fabrication Parts ductwork model can be exported

in MAJ file format to ductwork manufacturers or converted to a Fabrication model for further development including:

Ductwork reinforcement optimisation

Value engineering based on accurate Fabrication ESTmep costing data.

3.6 As-built ductwork model

Once the installation is completed any site changes can be used to finalise the As Built model for provision to the

client.




4 DUCTWORK SPECIFICATIONS

4.1 Ductwork standards

BIM-MEPAUS sheet metal ductwork services are generally based on AS 4254.2 - 2012 and AS 1668.1 - 2015

4.2 Ductwork sizes

All ductwork sizes are based on hard metric and are nominated as Top Plan View - Width X Depth X Length.

BIM-MEPAUS ductwork dimensions are based on sheet metal size that for plain or externally insulated ductwork is

airway size. For internally lined duct it is necessary to deduct the lining thickness to arrive at the airway size.

4.3 Ductwork materials

Galvanised sheet metal is based on G2 carbon steel with GZ-275 hot dip galvanised finish with the following gauges

used 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.6mm and 2.0mm.

Perforated metal is based on G2 carbon steel with GZ-275 hot dip galvanised finish 0.6mm gauge 2.33mm hole

diameter providing a percentage open area of 11%.

Alterative metal specifications comprise stainless steel 304L, stainless steel 316L and aluminum.

4.4 Pressure ratings

Australian Standard AS 4252 Ductwork for air handling systems in buildings lists a series of pressure classes from

125Pa through to 2500Pa. BIM-MEPAUS uses a simplified pressure rating framework:

Designation Pressure Rating

LP ≤ 500 Pa

HP ≤ 1000Pa

For pressures higher than 1000Pa, designate ductwork pressure in accordance with AS4254 - 2012 Table 2.2.1

Ductwork Pressure Rating Schedule.

4.5 Design parameters

The following metric design units and coefficients are used:

Airflow L/s

Airflow Velocity m/s

Loss Coefficient Kv values based on ASHRAE Data

Through the use of these parameters, Revit is able to provide air flows and estimated system pressure loses.

4.6 Air leakage

Air leakage must be accounted for when determining the required fan capacity.

For a given ductwork fabrication standard, air leakage is a function of system operating pressure and system surface

area. The air leakage calculation methods and acceptance criteria provided by ASHRAE, SMACNA or BSRIA codes

are based on pressure and system surface area, not system airflow and are the preferred basis for system leakage

calculations, testing and acceptance.

All BIM-MEPAUS ductwork specifications incorporate Class A sealing.




5 SYSTEMS, SERVICES AND SPECIFICATIONS

5.1 Systems, services and specifications

A key feature of the BIM-MEPAUS approach to ductwork modelling is the use of defined ductwork systems,

services and specifications. This approach draws from both the Revit approach to system modelling and the

Fabrication approach to shop drawing and manufacturing and is key to realising the full potential of constructible

Revit to Fabrication workflows:

Systems define the type of reticulation system: Supply Air System, Smoke Spill System, Clean Air System, etc.

Services set the ductwork type and routing preferences for a particular system.

Specifications detail the fabrication standards and details for the ductwork service.

In BIM-MEPAUS the system and service must be selected to model the system and specify the required ducting type

ie Toilet Exhaust – Low Pressure.

Within AS 4254.2 2012 it is permitted to optimize the ductwork sheet metal specification gauge and reinforcing

combination to achieve compliance through either deemed to satisfy or evidence based compliance methods. The

details in relation to reinforcement methods should be determined from the ductwork manufacturer’s specifications.

5.2 Service types

There are two types of ductwork services:

Design services provided with the BIM-MEPAUS Revit MEP template add-in using Revit Families

Fabricator services built from BIM-MEPAUS Revit Fabrication Parts.

The BIM-MEPAUS ductwork service naming convention syntax comprises:

Author_System_Service

Design Services

The BIM-MEPAUS template add-in provides one or more defined AS 4254.2 compliant family based services for

each system type.

For example, for supply air there are two standard BIM-MEPAUS services:

BMA_SA_LP

BMA_SA_HP

The full range of systems and services available in the template are listed in the BIM-MEPAUS Airside Systems,

Plant and Equipment Schedule.

Fabricator Services

Fabricator services are fully routed BIM-MEPAUS Revit Fabrication Part based services with enhanced features that

support shop drawing modelling and MAJ file format conversion.

Manufacturer Name_SA_LP

Manufacturer Name_SA_HP




6 DUCTWORK SYSTEMS

BIM-MEPAUS provides a naming scheme for ductwork systems based on Australian standards and industry practice.

The following table lists the foundation systems provided.

Designation System Colour Colour Name

CA Clean Air Dark Turquoise

CE Car Park Exhaust Coral

EA Exhaust Air - General Orange

HE Hazardous Exhaust Pale Violet Red

KE Kitchen Exhaust Pink

MA Make-up Air Light Green

OA Outside Air Light Green

PA Pressurisation Air (Smoke Control) Pale Green

RA Return Air Light Pink

SA Supply Air Light Blue

SE Smoke Exhaust Red

TA Transfer Air Yellow Green

TE Toilet Exhaust Light Salmon

The BIM-MEPAUS Airside systems, plant and equipment schedule provides the complete listing of systems and

their associated colour shading and line type RGB colour code.

Design Notes

I. Pressurisation air systems relate to AS 1668 zone smoke control systems – most commonly

these are stair pressurization systems but can serve other spaces and forms of exit paths that

are required to be positively pressurised in fire mode.

II. Refer to the BIM-MEPAUS System colour scheme

System Characteristic Colour Spectrum

Unconditioned outside air systems Turquoise – Green - Lime

Conditioned air systems Violet – Blue - Cobalt

Conditioned return air systems Light reds

Non Hazardous exhaust systems Amber - Orange

Smoke Exhaust systems Reds

Kitchen and hazardous exhaust systems Crimson – Magenta - Violet

For accurate colour renditions refer to HTML colour names.




7 DUCTWORK SPECIFICATIONS

Ductwork services are based on a limited range of ductwork specifications in order to reduce the complexity of

modelling and manufacturing workflows and associated embedded cost burdens.

Galvanised ductwork (Class A Sealed)

Service Designation Service Description

LP Low Pressure ≤ 500 Pa

HP High Pressure ≤ 1000 Pa

KE Kitchen Exhaust (LP) Minimum 1.2mm Gauge

CA Clean Room (HP) , Factory cleaned and sealed

prior to delivery

FR Fire Resistant (Low Pressure), strengthened for

fire wrap /spray

SD Sub duct

Stainless steel and aluminum ductwork

Service Designation Service Description

304 Stainless Steel 304L (Low Pressure)

KE304 Kitchen Exhaust Stainless Steel 304L min

thickness 0.9mm (Low Pressure)

316 Stainless Steel 316L (Low Pressure)

ALU Aluminum (Low Pressure)

Commentary

I. The majority of services use low pressure Class A sealed ductwork. Class A sealing has been

traditionally provided only for toilet exhaust, clean air and high pressure systems, however the

sealing of the longitudinal seam has been shown to be effective in reducing total system leakage,

an important determinate in overall system energy use, as well as greatly simplifying modelling

and manufacturing standards and processes.

II. Stainless steel ductwork is generally specified as 304L being the more economical of the two

stainless steel options. For harsh environments such as coastal locations, marine grade 316L

stainless may be specified due to its substantially better corrosion resistance. The cost difference

between 304L and 316L is typically of the order of 25-30%.




8 DUCTWORK SERVICES

Ductwork Services combine the system and ductwork specification. The following services are provided in the BIM-

MEPAUS template add-in:

Service System Specification

BMA_CA Clean Air CA

BMA_CE_LP Car Park Exhaust LP

BMA_EA_LP Exhaust Air - General LP

BMA_HE_LP Hazardous Exhaust LP

BMA_KE Kitchen Exhaust KE

BMA_MA_LP Make-up Air LP

BMA_OA_LP Outside Air LP

BMA_PA_LP Pressurisation Air LP

BMA_RA_LP Return Air LP

BMA_RA_FR Return Air (Fire Resistant) FR

BMA_SA_LP Supply Air HP

BMA_SA_HP Supply Air (High Pressure) HP

BMA_SE_LP Smoke Exhaust LP

BMA_SE_FR Smoke Exhaust FR

BMA_TA_LP Transfer Air LP

BMA_TE_LP Toilet Exhaust LP




9 RECTANGULAR DUCTWORK

9.1 General

Annexure B provides the rectangular ductwork templates for standard straights and fittings including the Fabrication

CID upon which the shape is based.

9.2 Standard connectors

Standard connectors are based on the use of the 35mm Transverse Duct Frame: 35 TDF.

Non-standard connectors include:

Loose Frame / Angle

Drive Cleat.

All connector designations are based on C1, C2 & C3 as detailed on the CID.

9.3 Internal linings

Standard internal insulation/acoustic linings are scheduled as

R1.2 (50mm)

R2.0 (75mm)

R3.0 (100mm).

For projects that have used a performance based solution to achieving the building energy efficiency requirements

a non-standard insulation/acoustic lining option has been provided:

R0.7 (25mm).

Refer to the BIM-MEPAUS Ductwork linings and insulation wrap specification for further details.

9.4 Rectangular straights

Ductwork straight lengths are determined by the combination of coil width, connector type and internal lining

thickness.

The standard coil width and connector forming the basis of the straights is 1500mm with 35mm TDF.

All straights are based on the Fabrication shape file CID 866.

Stepped frame straight lengths are defined for lining thicknesses and 35TDF connectors

9.5 Rectangular fittings

All fittings are referenced to a unique Fabrication CID shape that assures the design model is constructible.

The dimensions on the template are referenced to the CID dimensions and are shown in top plan view.

9.6 Rectangular accessories

Accessories comprise components that are typically added to ductwork and include access panels, doors and

spigots. Accessories are typically supplied as components to the ductwork manufacturer.

All accessories are referenced to unique Fabrication CID components that assures the design model is

constructible.




10 ROUND DUCTWORK

10.1 General

All round ductwork dimensions are based on sheet metal size.

All round duct is rated as high pressure due to the material thickness being determined by rigidity and manufacturing

requirements. The standard gauges within the specifications are:

0.6mm up to DIA 500

0.8mm DIA 550mm up to 900mm



All ductwork services, whether high or low pressure, incorporate the same round duct specification with the

exception of KE which has a minimum gauge of 1.2mm.

Internally lined ductwork is generally double skinned construction with 32kg/m3 polyester insulation. Internal lining

options are generally limited to R1.2 (50mm) or R2.0 (75mm).

10.2 Sizes

Round ductwork design services are based on a rationalised set of hard metric standard sizes.

The following standard round duct sizes are provided:

150mm 350mm 550mm 750mm 950mm 1300mm

200mm 400mm 600mm 800mm 1000mm 1400mm

250mm 450mm 650mm 850mm 1100mm 1500mm

300mm 500mm 700mm 900mm 1200mm 1600mm.

Standard Round straight lengths are nominated as 3.0m for material handling purposes with a maximum practical

length generally considered to be 6m.

10.3 Straights

All straights are based on the Fabrication shape file CID 40 and generally comprise spiral wound construction.

10.4 Fittings

All fittings are referenced to unique Fabrication CID shapes that assure the design model is constructible.

10.5 Accessories

Accessories comprise manufactured components that are typically added to ductwork and include access panels

and spigots.




11 OVAL DUCTWORK

11.1 General

All oval ductwork dimensions are based on sheet metal size.

All oval duct is rated as high pressure due to the material thickness being determined by rigidity and manufacturing

requirements. Standard gauges for the round tube stock used to form the oval duct are:

0.6mm up to DIA 500


1.0mm DIA 950mm and above

All Ductwork services, whether high or low pressure, incorporate the same oval duct specification with the exception

of KE which has a minimum gauge of 1.2mm.

Internally lined ductwork is generally double skinned duct with 32kg/m3 polyester insulation. Internal lining options

are generally limited to R1.2 (50mm).

Oval ductwork design services are based on a nominal set of dimensions due to the majority of Australian

manufacturer’s using imperial round tube sizes and imperial oval duct forming machines. The standard sizes are

limited to aspect ratios between 1:2 and 1:4.

Ductwork widths are nominal sizes only rounded to the nearest 5mm and the standard range of sizes are listed in

the templates. Nominal dimensions are:

150 x 500mm 300 x 635mm 400 x 890mm 500 x 1070mm

x 555mm x 710mm x 965mm x 1145mm

x 635mm x 790mm x 1040mm x 1225mm

x 865mm x 1120mm x 1305mm

200 x 535mm x 940mm x 1200mm x 1390mm

x 610mm x 1015mm x 1295mm x 1470mm

x 685mm x 1100mm x 1370mm x 1550mm

x 760mm x 1195mm x 1450mm x 1625mm

x 840mm x 1270mm x 1525mm x 1700mm

250 x 585mm 350 x 760mm 450 x 940mm 600 x 1250mm

x 660mm x 840mm x 1015mm x 1325mm

x 735mm x 915mm x 1090mm x 1405mm

x 810mm x 990mm x 1175mm x 1490mm

x 890mm x 1070mm x 1250mm x 1565mm

x 965mm x 1150mm x 1345mm x 1645mm

x 1050mm x 1245mm x 1420mm x 1720mm

x 1320mm x 1500mm x 1800mm

x 1575mm x 2000mm

Oval straight lengths can generally be manufactured to any length up to and including 3.6m.

11.2 Straights

All straights are based on the Fabrication shape file CID 40 and generally comprise spiral wound construction.




11.3 Fittings

A limited range of fittings are provided in Oval Duct and are referenced to a unique Fabrication CID shapes that

assure the design model is constructible.

11.4 Accessories

Accessories comprise manufactured components that are typically added to ductwork and include access panels

and spigots.




12 DUCTWORK SHARED PARAMETERS

The ductwork shared parameters are defined as follows:

General Dimensions

Width

Depth

Length

Diameter

C1 Dimensions : Entering Connector

C1DuctWidth

C1DuctDepth

C1DuctDiameter

C2 Dimensions : Leaving Connector

C2DuctWidth

C2DuctDepth

C2 DuctDiameter

C3 Dimensions : Leaving Connector

C3DuctWidth

C3DuctDepth

C3 DuctDiameter

Standard Rectangular Connector shared parameters are defined as follows

25/25 DC 25 Lining Recess, 25 Extension, Drive Cleat Connection

25/50 RE 25 Lining Recess, 50 Extension, Raw End Connection m

25/50 TDF 25 Lining Recess, 50 Extension, TDF Connection

50/25 BN 50x25 Turn In (Bull Nose)


50/50 RE 50Lining Recess, 50 Extension, Raw End Connection




75/50 RE 75 Lining Recess, 50 Extension, Raw End Connection




100/50 RE 100 Lining Recess, 50 Extension, Raw End Connection


TI-25 Turn In 25

TI-50BM Turn In @45 To Form Internal Bellmouth (50 Lining)

TI-75BM Turn In @45 To Form Internal Bellmouth (75 Lining)

TO-25/25 25x25 Turn Out






BIM-MEPAUS June 2016

ANNEXURE A – Ductwork legend and nomenclature

Ductwork general notes, legend and nomenclature Template

DUCTWORK GENERAL NOTES 001

DUCTWORK LEGEND 002

DUCTWORK NOMENCLATURE AND TAGGING 003

DUCTWORK LEGEND OF SYMBOLS 004




ANNEXURE B – Rectangular duct templates

Rectangular standard straights Template

GALVANISED STEEL 101

STAINLESS STEEL 102

ALUMINUM 103

Rectangular standard fittings Template

RADIUS BENDS 201

MITRED BENDS 202

OFFSETS 203

TRANSITIONS 204

RECTANGULAR TO ROUNDS 205

TEES 206

TROUSERS 207

SIDE BRANCHES 208

SHOES 209

RECTANGULAR SPIGOTS 210

DUCT ENDS 211

SUBDUCTS 212

Rectangular special fittings Template

NOT USED 300-399

Rectangular standard accessories Template

ACCESS PANELS 401

ACCESS DOORS 402

ROUND SPIGOTS FOR FLEXIBLE CONNECTIONS 403

OVAL SPIGOTS FOR FLEXIBLE CONNECTIONS 404

FLEXIBLE CONNECTORS 405

MESH SCREENS 406




ANNEXURE C – Round duct templates

Standard straights Template

ROUND - METRIC 501

Round standard fittings Template

ROUND BENDS 510

ROUND 2 WAY 511

ROUND MITRED OFFSET 512

ROUND OFFSETS 513

ROUND REDUCERS 514

ROUND TAKE-OFFS 515

ROUND RECTANGULAR SPIGOTS 516

ROUND DUCT END - CONNECTORS 517

Round accessories Template

ROUND HANGERS 580

ROUND ACCESS PANELS 581




ANNEXURE D – Oval duct templates

Standard straights Template

OVAL - METRIC 550

Oval standard fittings Template

OVAL BENDS 560

OVAL OFFSETS 561

OVAL REDUCERS 562

OVAL TAKE-OFFS 563

OVAL RECTANGULAR SPIGOT 564

OVAL DUCT ENDS 565




ANNEXURE E –CID Standard Option Settings

The following section provides the standard CID Option Default Settings embedded in the Revit Fabrication Parts

for the standard straight and fittings provided in the BIM-MEPAUS Template.




E.101 Standard Straight CID 866

E.201 Bends Radius CID 17




E.202 Bends Mitred CID 20

E.203 Offsets Radius CID 9




E.203 Offsets Mitred CID 30

E.204 Transitions CID2




E.205 Rectangular to Rounds CID 8

E.206 Tees – Mitred CID 14




E.206 Tees Radius CID 14

E.207 Trousers CID 328




E.208 Side Branches CID 18

E.209 Shoes CID 17




E.210 Rectangular Spigots CID 1

E.211 Duct Ends




E.211 Duct Ends (TDF CAP)

Documents

Template for report - Welcome to BIM- · PDF filedocument: BIM-MEPAUS acknowledges the contributions of those organisations involved in the development and review of this ... NCC