2nd qatar bim user day scheduling, qto and estimating technology

1 Dr. Racha Chahrour

HOCHTIEF ViCon

2nd Qatar BIM User Day “Technology is the key to success”

BIM for Project Scheduling and Quantity Take-Off Dr. Racha Chahrour HOCHTIEF ViCon Qatar W.L.L. www.hochtief-vicon.com

2 Dr. Racha Chahrour

HOCHTIEF ViCon

Agenda

1. 4D Model Creation Strategy

2. 4D Scheduling Software

3. Quantity Take Off

4. Summary

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HOCHTIEF ViCon

4D Model Creation Strategy

Major Elements

3D Model

Schedule

4D Model

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4D Editors

Program

Imp

ort

C

reate

4D

4D Scheduling Software

Available Software Systems

3D Model

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4D Scheduling Software

Manual Linking in NavisWorks

Structured 3D Selection Sets

Schedule activities Links

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HOCHTIEF ViCon

4D Scheduling Software

Rule-based Linking in NavisWorks

Parameter based search sets

Linking rules

Parameter

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4D Scheduling Software

Manual and Rule-based Linking in Synchro

Attributes 3D objects

Attribute scheduling tasks

Linking rules

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4D Scheduling Software

State of the Art Functionalities of 4D Editors

• Import various 3D model formats

• Support major scheduling software

• Construction sequence animation

• Synchronisation of model and program data

• Rule-based activity linking

Visual Schedule

Analysis

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HOCHTIEF ViCon

4D Scheduling Software

Limitations of 4D Editors

• Limited export of created 4D model

• Complex and time consuming linking process

• Focus on visual schedule analysis

• High efforts for 4D model updates

No Scheduling

Support

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HOCHTIEF ViCon

Quantity Take Off

Model-based Quantities - Creation Strategy / Software

Filled BOQ with model-based Quantities

Specs 3D Model

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HOCHTIEF ViCon

• Elements:

• Columns

• Walls

• Ceilings

• Beams

• Quantities with the corresponding structural elements

Quantity Take Off

Structural Elements

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HOCHTIEF ViCon

• All openings like doors, windows, ceiling fretworks are subtracted -according to the QRM- of the corresponding structural elements

• If wall and beams intersect, the intersection area is subtracted of the wall

Quantity Take Off

Rules of Measurements

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• Walls, columns and ceilings may have different qualities. e.g. walls:

a. Drywalls

b. Blockwork

c. Concrete

• So different types of walls are displayed in different colours

a. c.

Quantity Take Off

Visualisation of Object Attributes

b.

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• Finishing works can be calculated over the rooms

• A room is bounded by vertical and horizontal structural elements

Quantity Take Off

Finishing Works

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HOCHTIEF ViCon

• Full definition of model requirements at project start to ensure re-usage of 3D models

• Definition of the model structure considering construction joints

• Usage of appropriate agreed/standarised description for 3D model elements

• Implementation of rules of measurement to consider small openings

• Easy access to created data for all stakeholders

Quantity Take Off

Process Requirements

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Summary

• Latest technology is generally able to meet common project

requirements

• Rule-based schedule linking would improve performance

• Visualising the construction program improves project communication

among all stakeholders

• Data exchange is limited

• Quantity take off requires accurate, structured and qualified 3D

models

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HOCHTIEF ViCon

Dr. Racha Chahrour

BIM Manager

HOCHTIEF ViCon Qatar W.L.L.

www.hochtief-vicon.com

Thank you for your attention!