#au2013 #4dgonewild RC2261 Laser Scanning Gone Wild: 4D Clash Detection with the Point Cloud

Room: Lando 4304Type: Lecture

Learn how we used laser scanning and Autodesk® Building Design Suite to coordinate the installation of a new chiller and air handling unit in the basement of one of Florida’s premier performance venues. We demonstrate how we used Autodesk® ReCap™, Autodesk® Revit®-based software, Autodesk® Navisworks® software, and Apple® iPads® tablets to create a 4D clash detection model to preplan the movement of a 8.5-ton chiller into the existing mechanical room. Because performances scheduled throughout the construction limited downtime, having an efficient process was critical. The virtual design and construction (VDC) team learned the most efficient ways to transfer point cloud files using the ReCap RCS format, perform clash detection in the point cloud in Navisworks, create models, and distribute the information to the team for use in the field. This lean process helped all team members visualize and plan their work, and it provided the owner with a useful as-built model for future work.


Kris Lengieza, Director of Virtual Design and Construction, Stiles Corporation

Alix Loiseau, Vice President, ACAI Technologies

Laser scans are huge
In Revit rather than split objects for navis, use a section box and export that. 
39 scans. Post processing. 2 week period. 25 gig. How do we share. Box.com
Recap has to be installed with freedom to see the point cloud. 
Point cloud used to plan chain hoists location for installation. 
Walk through how you were going to do the work with the stakeholders, live on screen. 
Reflect trade knowledge in the model. 
Navisworks used with manual move and animator to simulate. 
Clean up the scans first. 
Create animation and path and tie to timeliner event. 
Use point setting for selection set for the point cloud. 
Bring in individual rcs files rather than rcp which stops the whole cloud lighting up but just the individual scans. 
Then link clash to timeliner. 
Set to check every 2 minutes over 5 days. 
Animation took an hour to run.

Key points
Load individual point files
Create your animation and timeline first. Keep it simple and get it done. 
Maker sure you use the right clash settings. 
Keep un-necessary clouds turned off. 
ROI – 700%

Laser scanning can be cost effective
Rapid measurements
No return trips
Information can be shared with a team
Software advances are streamlining the process. 
Work with a team with a proven workflow
Make sure you capture all the date you will need. 
Involve your team as much as possible. 

Make sure the scanning team understand your process and what you want to do. 

Scanning was $3500 per day. Try and go local to save on travel costs. 
Needs to be bid as it’s an engineering service. 

About Shaun Farrell

I have been involved in the construction sector since 1986 and over the years I have seen things change dramatically. Much of the change has been directly as a result of technology. This blog will be about the key combinations of People, Process and Technology. Any views expressed here are strictly my own.
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