Business Situation

Gensler requested ScanWorks services to complete a laser scan and provide a 3D Autodesk Revit model for their clients Jones Lang LaSalle.  The office space in Santa Clara, CA was about to have an overhaul in preparation for new building owners.  Gensler required ScanWorks to come in on Friday after-hours, scan the entire building and have all work and cleanup complete by the start of work Monday morning with no trace of activity.

Technical Response

ScanWorks scanned the entire office including all cubicles, offices, halls, doors, windows and stairways.  In addition, ScanWorks took down the ceiling tiles, completed a full scan of the above-ceiling elements and replaced the ceiling tiles.

Solution

Back in the office, ScanWorks CAD personnel processed the scan data into 3D Autodesk Revit and AutoCAD deliverables that includes the following:

 

• Data geo-referenced to existing Gensler 3D model
  
• All geometry in Autodesk Revit format and compliant to Gensler CAD Standards
  
• Building Structure including: walls, ceiling, beams, columns, seismic bracing, doors and windows
  
• Major MEP systems including control panels, lighting and HVAC system
  
• Miscellaneous permanently installed objects
  
• Photo-documentation of all areas scanned

Benefits

ScanWorks discreetly and efficiently provided highly useful, accurate as-built information to Gensler while meeting a very aggressive schedule.

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Business Situation

The Turner/PCL/Flatiron Joint Venture approached ScanWorks to complete a 3D laser scan of Terminal 2 of San Diego International Airport. The project team contacted ScanWorks after a failed attempt by the low-bid contractor to  provide an Autodesk Revit model of the existing conditions

Technical Response

The ScanWorks field crew quickly mobilized and established a strong presence on-site. Field technicians are not only responsible for full scan coverage but are empowered to take charge of situations to resolve logistics and coordination problems. The Turner/PCL/Flatiron project management team shadowed ScanWorks during the scan process. ScanWorks' professionalism and expertise instilled confidence in the client and highlighted the shortcomings of the previous provider.

Solution

Onsite, ScanWorks collected point cloud data for a 33,000 square foot area comprising of 56 individual scans. The complete on-site scan took one week and traversed through two remote areas. The individual scans were registered together into one compiled scan, then geo-referenced to the Revit model supplied by the client.

In the office, ScanWorks complied a Revit 3D model in approximately 1 month. ScanWorks modeled architectural and structural components including ceilings and floor contours accurate to 1/4". The deliverable also included sizeable mechanical elements such as baggage-handling conveyor, the HVAC system, and environmental and electrical piping over 2” in diameter. Lastly, fine detail was added in the form of support structures, seismic bracing and header steel that supported the room elements.

A final review session with the design team flushed out QA/QC items. Doing so ensured file compatibility, provided for last minute additions and signified final acceptance of the deliverable. ScanWorks supplied the client a raw data overlay on the model in NavisWorks format and a provided a complete photo-documentation as a validation of the 3D geometry.

Benefits

ScanWorks was proud to be able to change the perception of the Turner/PCL/Flatiron team regarding the effectiveness of laser scanning technology. With our industry-leading, unmatched airport experience backing us, ScanWorks saved the Terminal 2 West project from tens of thousands of dollars in delays and empowered the design team with a Revit model from which they can coordinate design efforts with confidence.

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ScanWorks was commissioned by the engineer of record to provide a quality assurance as-built to the general contractor. They were looking for a quick and accurate survey of the ground in its current shape, and a quantity of the fill that was available onsite. With these two critical pieces of information the contractor would be assured that he had enough dirt to finish the job and that he was on schedule.

This early stage of the project is notorious for budget overruns and schedule delays because of the inaccuracies inherit to working with dirt. The challenge was to do it accurately enough to instill confidence. Conventional methods would have been sloppy and time-consuming. Ultimately our deliverable to the client was the piece of mind that the project was on the right track.	More accurate than GPS Quicker than conventional survey No need to reshape earthwork Data collected without disrupting operations

Bush Intercontinental is Texas' second largest air facility, after Dallas-Fort Worth International Airport. The airport has flights to parts of the U.S, as well as to Canada, Central and South America, Europe, Africa and Asia.It is the ninth busiest for total passengers and the seventh largest international passenger gateway in the United States as well as the sixth busiest airport in the world for total aircraft movements according to the ACI World Traffic Report for 2005. Recently IAH was named the fourth-fastest growing airport in the world. The airport currently ranks third in the United States for non-stop domestic and international service with 182 destinations.

The scope of work to be fulfilled by Scanworks was to include an obstruction analysis for the envelope of the system to be installed. For example, Scanworks pinpointed objects that would impede the installation of the system and also noted the accuracy of structural members called out on the plans provided. These objects can range from something as minor as a light fixture in the new conveyor path, or as immovable an object as an HVAC system or a main water line. Scanworks consulted with the project engineering staff of G&T prior to mobilization to get a clear and concise knowledge of what was to be expected throughout this process. The client’s as-built drawings are superimposed on the scan pointcloud in order to verify the project centerlines and critical points of interest noted by the engineers of G&T. It was also the responsibility of Scanworks to provide analysis of the structural members in the areas to be scanned. This is an important area of information due to the fact that the initial design to the baggage facility was derived from the existing location of the columns on site. With all dimensions for installation of the new system based on the plan location of the columns on site, accurate column location, plumbness and size then becomes paramount to the project. And in this case, much like others, laser scanning finds that column location can vary from a few hundredths of a foot, and in some cases even feet. At this point, the delivery of the actual physical column location Scanworks provides the client gives them an added peace of mind knowing that delays and the installation procedure will not be hindered by inaccuracies provided in design. Not only were the obstruction analysis of the new project envelope delivered by Scanworks, but a analysis of the column locations, wall locations, and a contour of the existing slab on grade also provided. Much like other contractors, G&T uses the finish floor elevation to achieve a base for vertical control on site. Scanworks discovered a potential major problem on the IAH project as it relates to the FF elevation. The initial scanning in Phase 7 of the project noted an approximate 2.50’ slope on the floor in 200 feet. The drawings provided to G&T showed a finish floor level and lacking relief. This was caught early in the scanning process and the G&T engineering department made the correct adjustments and costly delays were thwarted.

Another responsibility of Scanworks on the IAH project was to rotate and translate the existing site data we scanned to the project orientation. Since survey control is rarely provided, and if it is, it is not necessarily tied to the AutoCAD file we are provided by the client. To combat this, Scanworks is able to take the actual overall location of the structural members on the drawings and create a grid. This is quite helpful to both Scanworks and G&T in the fact that once this merger is achieved, both parties can proceed forward using the same grid coordinates. Scanworks also sets permanent monumentation, either a PK nail or an x-cut on each project to ensure in the case of a return site visit, all data gathered will be on the same datum as the initial scanning procedure. As an added bonus to setting monumentation, additional data can be achieved through conventional survey means, thus we are able to gather a few points here forth without the use of the HDS 3000. Digital photos are also to be furnished at critical locations and at each scanning location (if feasible) to assist in the data manipulation in the office environment.

Progression of images from Photo of the site, to Scan of the Site, to overlay of the new design onto scan data (from left to right).

Overlay of the design drawings on the scan as-built. Over 40 obstructions and misalignments were found within this project. These design challenges would not have been addressed until the equipment was manufactured and ready to install. At which time, the cost to correct these problems more than doubles.

Detail of an HVAC system that was believed to be in the way of a new conveyor. Coordination of potential problems can now be resolved at the beginning of the project rather than during.