an australian public works department -...

Scott Beazley Australasian Chapter, Oslo March 2012

Open BIM?

Some Australian examples

An Australian Public Works Department Lead by a dynamic early BIM adopter

Corporatized arm of state government


Open BIM ?


Organisational Structure - Large range of scale and types of government buildings

- Projects up to about $50 mil done in-house

- Multi-disciplinary organization

- Range of projects with external consultants

Architecture

Building Surveying

Civil Engineering

Electrical Engineering

Environmental Engineering

Fire Services

Hydraulic Engineering

Landscape Architecture

Mechanical Engineering

Office Interiors

Project Management

Quantity Surveying

Specialist Engineering

Structural Engineering

Surveying

Town Planning


ArchiCAD about 40%

Revit Architecture about 60%

Revit Structure

Revit MEP

DDS Hydraulics

CadDuct

ArchiCAD - Interiors

ArchiCAD - Landscape

Solibri

Affinity

Codebook

CostX

Tekla

12D

IES

SketchUp

Navisworks

EDM Model Server

Plus others

Looking at:

Artra

Urban Circus

EcoDomus

dRofus

Ryhti

A large range of BIM Software used:


Reality:

- Almost every project is multi-platform

- Need for interoperability


An IFC/BIM Pilot Project in the past


Suburban public building


Discipline Models

- Architecture

- Structural

- Mechanical

- Electrical

- Hydraulic

- Civil

- Landscape

- Interior Design


Models Supplied to Contractor

Architecture

Civil

Electrical

Hydraulic Structural

Mechanical

Landscape

Fitout

The Contractor could open individual files or combined models to view.


Software Viewers There were two viewers supplied to the contractor, DDS Viewer (bottom right) and

Tekla Viewer for structures (Top left).

With the DDS Viewer,

contractors were able to

slice the model up and

interrogate any area they

desired.


IFC Model

CNC Cutting Machines

Site Installation

Manufacturing Process


Structural Visualisation


MEP analyses

Office building


Office building

MEP analyses


Office building


Office building

MEP analyses


Office building


Open BIM?

Current Aim


Open BIM?

Current Reality


Why is this?

- Almost every project is multi-platform

- This leads to significant problems with digital

collaboration and project co-ordination

- Higher level use of models for analysis and simulation

becomes restricted

How to solve this?

Greater interoperability

How to achieve that?


What to address first? - Issues of quality of IFC export file from source software

Why?

- Poor or inconsistent modelling practice

- Custom object created for project to random standard

- Poor or inconsistent quality of Library Objects

- Incorrect IFC definitions of objects

- Incorrect mapping when exporting

Result: Staff reaction "IFC's don't work”

- So where are the problems?


A place to start:

The Revit to IFC process

- This greatest area for benefit as architecture,

structure and services done in Revit.

Quality control tools needed:

- Simple to use for modellers

- Quick results

- Useful for monitoring projects


Tools being looked at to assist in quality control:

- IFC File Analyzer

- IFC Object Counter

- Solibri Model Checker

- Navisworks

- DDS Viewer

- Solibri Model Viewer


Process 1. Export IFC file

2. Run through IFC File Analyzer

3. Identify 'BuildingElementProxy' objects

4. Upgrade Revit file with IFC Parameter Upgrade file

5. Create schedules in Revit for Multi Categories, and other

appropriate object types

6. Check results from schedules and IFC File Analyzer output

7. Add or alter IFC definitions

8. Check export mapping file, and alter to correct mappings

Repeat 1. Export again

Repeat 2. Run IFC File Analyzer again etc.

9. Check number of objects present in Revit and IFC files


DDS Viewer - All IFC objects


All IFC objects except IFCSpace objects


Only IFCBuildingElementProxy objects


Results: - This process helps modellers to understand the need to use

correct BIM tool, and correct associated IFC parameter, and

enables them to be main point of quality control.

- It is not particularly sophisticated but introduces a quality control

capability without staff learning new ‘challenging’ software.

- This is a narrow focus and easier for staff to comprehend

- Consistent higher quality models created for other purposes.

- More thorough and detailed analyses are done with Solibri Model

Checker and Navisworks for a range of purposes, ie. Clash

detection, code compliance.


Resultant requirements:

1. Staff training

- IFC understanding

- Revit export process

2. Need for Revit – IFC mappings to be documented

3. Better quality Object Library

- Correct IFC definitions


2. Need for Revit – IFC mappings to be

defined and documented

- Classification – need to settle on system for

Australia

- IFD / bsDD needed

- Revit Categories and sub Categories

assigned correct IFC definition


2. Need for Revit – IFC mappings to be

defined and documented

IFD / bsDD ?

Real world / Revit name mapping to IFC definition

IFC definition mapping to real world / Revit name


3. Better quality Object Library

- Correct IFC definitions

- Correct BIM tools used to construct objects

- Objects populated with useful and complete parameters

- And.......


3. National Objects Library project

- Research project of ‘Sustainable Built Environment national

research centre’ (SBEnrc)

- Queensland University of Technology (QUT) lead

by Robin Drogemuller

- Project Services main contributor

- NATSPEC contributor

- Quality objects with parameters to be useful over building life

cycle


Open BIM ?

Still need to solve the:

- People issues

- Model quality issues

- Process issues


BIM Modeller ?


Thank you.

Open BIM ?

- Any answers?

an australian public works department -...

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