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Some Essential Tips for BIM

BIM (Building Information Modeling) brings powerful features to visualize design layout and figure out building performance throughout a projects development. But work with 3D laser scanners and modelling software still has some challenges. Here are some tips which can help as-built BIM development process, from planning and scanning through to processing and delivery.

 

Bidding and Project Planning

 

  • Convey and educate - 3D scanning and modelling are still new enough that customer might not have a transparent idea of what these processes entail. Educate them and convey throughout the project so that they capture whats attainable, then deliver the detail they require.

  • Explain the project scope - To get a transparent scope of task, walk the client through the choices. Do they require the BIM to incorporate building interior, exterior or both? Do they have MEP (mechanical/electrical/plumbing) designed within the ceiling tiles? And if the deliverable models be colour or greyscale?

  • Find out what characteristic must be designed  Request how the client can use the BIM to understand if the design ought to be firm to an equivalent system.

  • Visit the location  Take picture and make report of the square footage and number of rooms. Also start design how many scans you will need. This data will help to decide time concern and overall project costs.

  • Acknowledge final output - In getting ready the bid, take product delivery under consideration. BIM files are extremely large. Will the consumer handle them? If thus, do the files need to be regenerate to a selected format? Are the files is to deliverable via the cloud? The information will have to be organizing for a remote viewing portal that the consumer will see the information online.

  • Arrange scans schedule - Lots of time needed onsite for scanning, therefore correlate the time arrangement with the consumer. If working in a live project or hospital with limited access throughout the day, confirm that there has enough personnel to complete the scans on schedule. If possible rental extra scanners to add speed on completion.

 

On Site Data Collection

 

  • Split the project - The enormity of scanning projects like sports stadiums and hospitals will overwhelm the whole method. Divide them into tiny segments. Let the experts scan one at a time and linked them composed with survey control. This ends up in smaller files sizes that are easier to development and register.

  • Know site circumstances - Areas of high reflectivity, vibration and airborne debris will have negative impact on laser scanning. Set up plan in an appropriately. At first planned where to place the scanners to avoid line-of-sight obstructions. If ceiling tiles should be removed, ask client about authorizing person to move them.

  • Usual procedure for quality control - Data correctness is important for BIM. Use survey references on site together with overlapping scans and targets to confirm that assembling information are correct which will be registered. Regularly check the adjustment of scanners.

  • Register point cloud - Understand that target-less and targeted registration is obtainable. Understand whether or not the consumer wants the point cloud registered to a local coordinate system or analysis control. Large project has to survey control and targets.

  • Scanner placement  Knowledge about what information will be extracted from the BIM (e.g. if client want to know about denseness of I-beams then have to capture both sides of the beams in the scans). For this always place scanner for maximum coverage of project.

  • Scanner settings - Scanning options that are tiny or far within the background need higher point density than larger options near to the scanner. Please remember automated extraction software consistently performs higher with dense point clouds.

  • Scan quantity  Take as many scans as can with high density. Additional data will be edited or filtered but if collected data is not enough then have to go to site and make scan twice. It may be displeasure to clients.

 

Data Processing and Modelling

 

  • Go target-less  Always do target-less registration. It is useful and works beautifully to project. Try to use cloud to cloud and survey control to make it work.

  • Accumulate the scan data  Before start modelling continually filter the information to reduce noise and artefacts. It compressed file sizes and improves the correctness of automated extraction software.

  • Edit by selection  Always remove unwanted data for the CAD reference model but keep the backup data for future use. Bring the extra data back in after feature extraction to create a complete 3D visualization of the scene without any abyss.

  • Coordinate CAD file origins and orientation before finalizing registration and translation - Time of BIM drops into place in Auto CAD  every client love it. Arrange it for them in their approved coordinate system before delivery.
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  • Take clients Revit template for temporary use  If the client has worked with 3D models should probably have a recommended workflow and template that specifies sizes of ducts, pipes and different options. Always use their template to create your deliverable project.

  • Dont move scans in Revit  It is not recommended but if required always link scans by shared coordinates.

  • Background  A white background is the default for Revit but always switch to black that comes in handy once presenting light  coloured element.

  • Place Recap files on their own work sets - This permits the consumer to load smaller work sets as required once they open a file, avoiding the system delay that may occur once a large file is accessed.

  • Use GUI Templates in Revit - These enable you to standardize the graphics and overrides of typical views like plans, elevations, sections and 3D views to speed up modelling and supply the consumer with a fast way to create extra views.

  • Produce camera views - Model from the position of the scanner for any point cloud. This position has the most effective data view and density, creating for easier modelling.

  • Use Navisworks for colour walkthroughs - One amongst the most effective ways that to ascertain your models to seek out mistakes and missing information is to run through it in Navisworks with each the point cloud and 3D model.

  • Use automated feature extraction - Scanning collects plenty of information accurately; however manual modelling remains time-taking and error-prone. New developed software package just like the EdgeWise product line extracts options automatically from the point cloud in order that they will be sculptured in their precise locations, orientations and dimension. The time savings will be important.

 

So dont afraid of new technology, keep upgrade own self and watch the continued improvement on your bottom line.

 

For smaller residential projects, minimum requirements are given below:

 

OS - Microsoft Windows 7, 8, or 8.1 (64-bit)

CPU Type - Single- or Multi-Core Intel Pentium, Xeon or i-Series processor or AMD equivalent with SSE2 technology. Highest affordable CPU speed rating recommended

Memory - 8 GB Ram (recommend at least 4GB)

Video Display - 1280 x 1024 with true colour, DPI Display Setting: 150% or less

Video Adapter - DirectX 11 capable graphic card with Shader Model 3

Disk Space  5 GB free disk space

 

 

Some Essential Tips for BIM
Image Courtesy:- bradleybim.com