AECOsimBD A14 Clash Detection

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AECOsimBuilding

Designer

2012

Bentley Systems, Incorporatedwww.Bentley.com/AECOsim

uick Start Guide

Chapter 14

Clash

Detection
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AECOSIM BUILDING DESIGNER

CHAPTER 14CLASH DETECTION

www.Bentley.com/AECOsim Page 2 of 6 v2.0

2012 Bentley Systems, Incorporated

Table of Contents

Clash Detection ........................................................................................................... 3

Creating a Clash Detection ......................................................................................... 3

Creating a New Job ................................................................................................. 3

Defining the Clash Sets ........................................................................................... 4

Running a Clash Detection .......................................................................................... 4

Results ................................................................................................................. 4

Grouping Clashes ................................................................................................... 5

Saving a Clash Job ................................................................................................. 6


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CLASH DETECTION

Once there is building content in the model, designers need the ability to analyze the accuracy

of 3D models across all disciplines to ensure that architectural, structural, and mechanical

components are properly spaced for installation. The capability to identify and resolve conflicts

and interferences in the design prior to construction helps to avoids costly change orders and

reduce construction costs.

Clash detection is an analytical tool which automates the clash detection process. AECOsim

Building Designers Clash Detection allows designers to identify sets of business or graphical

elements and to detect geometrical clashes between these object element sets. The designer

can then interactively and graphically review these clashes.

Suppression rules can be applied to identify clashes that should not be reported. The settings

associated with the clash runs are managed and tracked as a clash job. A job is a container of

criteria, rules and results, which are set up and saved in the active file for reuse. A job can also

be stored in aDGN library.A job can be defined and processed in read-only files but the jobdefinition and results cannot be stored.

Additional Clash Detection capabilities, such as the Clash Detection Markup feature is

only available in Bentley Navigator. Bentley Navigator is a separate application and is not

included with AECOsim Building Designer.

CREATING A CLASH DETECTION

Clash detection is managed through theClash

Detectiondialog,which is used to set up the clash

operations and automate the clash detection process.

Creating a New Job

The Clash Detectiontool found on the Coordination

task bar is used to open the Clash Detection dialog.

In the Clash Detectiondialog, click the Create a

New Jobicon.

A new entry is added to the job list with the default

name, Untitled Job. Untitled Jobis highlighted and ready

to be renamed. Give the new job entry a descriptive

name.

Once the job is created, then two sets of elements must

be defined.


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Defining the Clash Sets

The Clash Detectiondialog

contains controls to select the

criteria included in the clash

detection job. The elements in SetAare checked against the elements

in Set B. The elements in Set A

display in red and elements in Set

Bdisplay in blue. The sets can be

defined by Levels, by

References, and by Named

Groups. Drag and drop references,

levels, or named groups from the

column on the left to either Set A

or Set Bon the right. Only

elements visible in a view areincluded in the clash detection;

turning off an element removes it

from the clash detection

A Soft Clearance can be added to either set indicating a zone of a given dimension around all

the elements in a set that would be considered a clash. For instance, ductwork may require

three inches of insulation that is not actually modeled. These clashes will show up as Soft

clashes vs. Hard clashes.

RUNNING A CLASH DETECTION

Once the clash detection criteria for each set are established the Process button will highlight

and the Clash Job can be processed.

Results

When the clash detection job is finished processing, the

results display in the Resultstab which automatically

opens. The application view window automatically zooms

in to display the first clash in the clash list.

Use the Previous Clashand Next Clashiconsto select other clashes in the Resultstab, and view

them in the model. When selected, the application zooms

to display the clash components.

Designers can choose to display one or both

clash elements, and they can choose to display them

with a gray background color behind them. When


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displayed, the clash elements are highlighted with the color of their object set.

The status of a clash can also be changed by clicking the applicable Statuscolumn cell.

Statusoptions display from a drop down list which include New, Old,Assigned,Acceptedand Follow Up.

Use theAssigned Tocolumn to assign the resolution of the clash to a particular discipline or

individual.

The Typecolumn indicates the type of clash, either Softor Hard.

Grouping Clashes

After processing a clash detection job, there may be too many clashes to review each one

individually. Clashes can be grouped together to consolidate the number of actual clashes that

are tracked. When clashes are grouped, one change will affect all the clashes in the group,such as changing the status or assignee.

A group can be created by two different methods:

Manually selecting the clashes and grouping them- From the Results tab,

to select all the clashes to be included in the group. Right-click, and

from the pop-up menu, select Create Group> From Selection. All selected clashes

are included in the group. To view all the clashes in the group, in theAll Jobslist box,

select the group to display the clashes on the Resultstab.

Identifying all the clashes that contain a certain element- For example, a run

of duct may clash with multiple elements but the clashes should be tracked as one clash

since moving the duct will resolve all the clashes. In the Resultstab, select a clash

that has the element that has multiple clashes to be grouped, right-clickand select

Create Group> From Clashes on Element A.

All clashes that have a common element in Set Aare now included in the newly created

group.


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When a group is deleted, the individual clashes within that group are not deleted.

Saving a Clash Job

Use the Saveicon to save the clash detection job for later review. Notice that the name of

the job appears in the dialog box title bar when the job is saved.

A saved job can also be updated with new results when new components are added to the

model. In this case simply run the job again. Clashed that have been fixed will show a Status

of Resolved.

MOVIE: Clash Detection

This movie shows:

1. Finding a Clash

2. Clash Resolution
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AECOsimBD A14 Clash Detection