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Steve Jennings: Power, Process and Plant Division, Trimble Navigation Limited

Jayan Mundakkal: Construction Automation Manager, Bechtel Construction Operations Inc.

•  Laser Scanning Technology in Field Construction  Technology Adoption  Past Indicators  Analog to Digital Analogies  Significance and Transition

•  Real time verification and QA •  Streamline design phase using actual asbuilt data •  3D Scanning solutions

3D Scanning Mid / Long Range Terrestrial Scanners Trimble VX Technology Time-of-flight Speed

Up to 15 pts/sec


150m, DR range 800m

Distance Accuracy

1mm + 1ppm

Unique Features

Total station, imaging, 3D scanning: 3-in-1

Trimble GX Technology Time-of-flight Speed

Up to 5,000 pts/sec



Distance Accuracy

1.75mm @ 25m on 90% reflectivity

Unique Features

Smart scanning mode: SureScanTM, fast target

3D Scanning Short Range / High Speed Terrestrial Scanners FX


Technology Phase-shift

Technology WavepulseTM


Up to 210,000 pts/sec


54,000 pts/sec


Up to 46m


Up to 80m

Distance Accuracy

0.8mm @ 25m on 90% reflectivity

Distance Accuracy

1.2mm @ 25m on 90% reflectivity

Unique Features

Highest accuracy in short range on market

Unique Features

Constant accuracy over full range

Field implementation – Successful Approach

•  People –  Survey team ownership, survey crew availability –  Field and home office engineering engagement –  Conceptualize 3D •  Process –  Safety –  Phased approach on scanning projects –  Identification, measurement, validation and reporting of potential benefits •  Systems –  Right selection of hardware and software based on selected projects –  Integration, workflow and work process alignment of scanning project •  Leadership –  Documenting and communicating ROI –  Promoting, Educating and training –  Building a community

Field Example – Modularization

Scan of vessel before shipping to identify any alignment issues with base foundation and center of bolt holes. Corrections can be made before shipping there by reducing risk and schedule delays

Field Example – Reduce Risk / Cost and schedule savings

Scan of rebar before concrete pour. All rebar and plates can be accurately located in the scan and referenced in the field post concrete pour. This reduces chances of intercepting steel during penetrations and other installations

Field Example – Reduce Risk / Constructability

Measure dimensions after construction and compare with engineering designs to validate anomalies. Multiple measurements and analysis can be done from a single scan and is available for future use.

Field Example – Reduce Risk / Constructability

Measure dimensions after construction and compare with design to validate anomalies. Measurements are also compared against fabricated units for constructability before shipping

Field Example - Precondition survey and documenting

Scanning asset condition before construction in high risk areas reduces risk and provides documentation on pre existing conditions.