BIM and 3D laser scanning

3D Laser scanning is the process that generates highly accurate location information to produce uniformly precise 3D models which later on can be utilized to repair, renovate, estimate the need for structural upgrade or seismic retrofitting, design visualization and optimize our infrastructure for a more sustainable future. So the progression of adapting old structures for new purposes or “adaptive reuse” in view of the current economic climate and sustainability efforts is possible with 3D laser scanning.

3D laser scanning provide detailed modeling or information for modeling and any development, any addition, virtually any view situation or impact, any re-creation or any topography impact can be prepared digitally.

The level of detail and the completeness that in many cases only laser scanning can provide.

Now-a-days laser scanning combined with a BIM-centric process can support a building’s entire life cycle to a great extent. It develops resource efficiency of buildings, which is a basis of sustainability efforts today. The architect and engineers armed with this complete model can now create improved informed intervention early on the design stage and provide a real impact on design decisions for the future of the building or other infrastructure. Long term facility management systems can be arranged for future maintenance and upgrade projects.

Laser scanning can be applied to support the detailed documentation of the as-built to instigate a facilities program for the long-standing management of an asset. 3D laser scanning facilitates the provision for quick, precise as-built data of large, complicated, and often dilapidated buildings and their supporting infrastructure (water pipes, sewers, drainage, etc.). The as-built data is utilized for planning and design process mainly where sustainability and reprocess of existing infrastructure become an important factor in areas like energy refits. Designers are able to evaluate the prospective reuse of buildings as well as understand the original construction.

In a historical preservation project exclusive of laser scanning it is not possible to assure that the contractor is deliver the desired product.



By applying laser scanning combined with a BIM-centric process mechanical, electrical, and plumbing (MEP) spaces within the facility can be scanned and documented from several vantage points. These 3-D laser scans contained all accessible facilities and installed components as well as mechanical, electrical, and plumbing fit-outs; air handling duct work; and structural ladders, catwalks, and platforms.

The scanner accumulated raw data of all elements in the facility in the form of a dense 3-D spherical point cloud made up of millions of 3-D coordinates. In the end, these 3-D laser images formed a high-definition survey within the facility. After the completion of the scan, the scanning images are brought into BIM software by means of the Pointools plug-in to generate engineered geometry-based models.

Tools for 3D Data Capturing
Low cost survey:

• Laser Disto

Surveying :

• Robotic total station

3D Imaging, Laserscanning :

• FARO Laser Scanner LS
• Leica 3D Laser Scanners

Upcoming technologies :

• Photogrammetry
– Dense image matching
• Vision SLAM
– via smart mobile device or UAV helicopter
• Range Cameras
– E.g. PrimeSense, Microsoft

Useful links
http://www.comitproject.org.uk/downloads/events/construction_mobileit_2011/Capturing%203D%20Geometry%20for%20BIM.pdf
http://www.leica-geosystems.com/media/new/product_solution/BIM_and_Laser_Scanning_The_American_Surveyor_072009.pdf

Posted by Rajib Dey

Business Development

rajib@jobs2india.com

Global Associates (Pioneer Company in 3D modeling with BIM & Sketchup)

visit our BIM sites

www.bimoutsourcing.com

www.bimcoordination.com

How a BIM model can be utilized for commissioning

BIM for commissioning is the progression of synchronizing and incorporating as-installed information and documentation from construction quality and commissioning agendas in the field and at the point-of-construction to facilitate competence in the delivery method of a construction project and in continuing operations and energy use.

A BIM model can be utilized for commissioning to verify its accuracy. This puts the model up for "Facility Management" from the BIM model.

The BIM act as a digital dashboard, documenting every step, facilitating operators a very speedy, precise picture of the accurate position of the commissioning process.

Building owners can commission this hi-tech technology with foresight and planning to get the best out of the BIM model for their building. The owner should train themselves on what value will be taken out from BIM and how it affects their business, makes efficiencies and in due course saves them money.

If a BIM model includes rich content then it will become more functional and precious in the downstream for maintenance and operations.

BIM selectively provides information with its conceptual methodologies, realistic methods and technical programs.

An apparent focus for your model is necessary as it makes the most significant part of the commissioning procedure. The level of detail in a BIM model can straightforwardly make an effect on scheduling and costs.

A BIM deliverable should be distinctive in comparison with the building it stands for. In this case the user should know what the model contains and how detailed it should be. To make sure that your deliverable will fulfill your requirements, the following steps should be taken during commissioning.

Initially make out how the model will support facilities management. BIM facilitates you achieve superior control over areas similar to energy spend, space planning, and asset management – which of these benefits are you seeking?

When you are aware of the model’s scope, deliver background data to the design team. In the case of commissioning for energy management, assist the contractor to collect acknowledged data to be utilized for populating the model.

For energy analysis, the owner should produce more information like information about the mechanical systems, occupancy, building schedule, utility bills, rough estimates of floor-to-ceiling heights, and glazing percentages to create a better building.

The project stakeholders utilize BIM on the construction job site and at the point-of-construction to leverage the structured data sets and associated documents for executing a wide range of field programs and daily activities as described below :-

Deal with advanced tasks as well as start, end, planned and actual dates, along with start-up, testing, adjusting and balancing (TAB), functional tests, operational procedures, training, handover and warranty.

Bring up to date as-installed information from equipment, sub-systems, systems and correlated work in the field, along with status of work arranged to date, physical location and nameplate data such as serial numbers.

Supervise track and task problems related to work to complete or correct to guarantee that physical work match to the contractual obligations and equipment performance act in accordance with the project specifications.

Execute and record the results of processes, ensures and tests using standardized QA/QC and commissioning (Cx) checklist templates, for instance pre- and practical performance tests and manages point-to-point checks.

Attach and chalk up photos of as-installed conditions for the record, to balance warranty management and risk management programs after surrender through the warranty period.

Connect and chalk up documents and drawings, for example equipment plans and reflected ceiling plan (RCP) interface layouts, piping & instrumentation diagrams (P&IDs), manufacturer’s certs and 3rd party test results.

Posted by Rajib Dey
Business Development
rajib@jobs2india.com
Global Associates (Pioneer Company in 3D modeling with BIM & Sketchup)

visit our BIM sites
www.bimoutsourcing.com
www.bimcoordination.com