Scan to BIM

We’ll provide you with useful information about Scan to BIM process. Hope that the articles will give you great ideas for your Scan to BIM (also known as Point Cloud to BIM) projects

LOD and LOI requirement
BIM for Architects, Scan to BIM

LOD and LOI and Everything You Need to Know

Are you currently working on a Scan to BIM project? Has your client asked you to produce a BIM model to ‘LOD 400’ or a specific Level of Information? If you don’t understand them thoroughly, then you may create the wrong model compared with the client’s requirements. So it’s necessary to understand the LOD and LOI requirements.

So what it really means and how do we meet all LOD and LOI requirements? Read on to find the answers or ask our BIM consultant to help you.

1. What are BIM LOD and other acronyms

In reality, there are several acronyms that sometimes can be difficult to understand or remember. LOD, LOI…what do they all mean? Before we even attempt to explain the difference between them and what they mean, we need to know what they stand for:

  • LOD: Level of Detail, demonstrates the graphical content of models
  • LOI: Level of Information, demonstrates the non-graphical content of models

As you know LOD 100, LOD 200, or LOD 300 are inputs based on geometry. LOD 400 can be achieved in the model from visual observations on the sitemap. The following examples will help you easily understand the difference between LOD and LOI.

LOD 1 – A Mass Model

The LOD 1 will be a Mass Model of the building, place, or structure. It will not contain doors or windows. This type of model is mainly the surface model.

ViBIM LOD 1

LOD 2 – Shell and Core Model

The LOD2 model will include main structural elements and the penetrations of the building such as floor panels, columns, beams, and basic structures of doors, windows.

ViBIM LOD 2

LOD 3 – Standard Survey Model

The LOD 3 model also consists of main Architectural details. The basic family can be created for doors and windows. Besides, the main objects can be modeled in the concept design. With LOD 3, the modeler also can create the simple model of the fixed furniture and accessories if required.

ViBIM LOD 3

LOD 4 – Detailed Survey Model

The LOD 4 model will contain Architectural elements and Structural details. The primary and auxiliary services can be modeled at a highly detailed level. Additional details may include baseboards, architecture, rails, and furnaces or surface.

ViBIM LOD 4

2. The benefits of accurate modeling according to LOD and LOI requirements

The level of detail is ranged from simple to complex in terms of geometry (LOD) and information (LOI).

So the 3D BIM models meeting the LOD and LOI requirements will enable you to have accurate and sufficient information on the BIM objects. This is of value to your next designing stage such as exporting drawings or extracting information from the model.

  • LOD 100 – Concept design
  • LOD 200 – Schematic design
  • LOD 300 – Detailed design
  • LOD 400 – Fabrication and assembly
  • LOD 500 – As-built model

Example 1: The wall requires LOD 1: The external walls are modeled as a block object

Example of LOD 1

Example 2: The wall requires LOD 2: The structural walls are modeled with an overall thickness.

Example of LOD 2

Example 3: The wall requires LOD 3: All walls are modeled with overall thickness.

Example of LOD 3

Example 4: The wall requires LOD 4: All walls are modeled with overall thickness and decorative details.

Example of LOD 4

The next example will help you know more about the LOD and LOI requirements of the MEP system:

  • LOD2: The modeler just needs to create the model of huge equipment as required;
  • LOD3:
    + Duct, Pipe, Cable tray will be modeled according to the fitting. For Valve, if the client requires the LOD 3, the modeler will create the model of the valve’s crank into a plane, but not include the bolts.
    + For mechanical equipment, the modeler will just need to create the model of the main structural objects, not including bolts, and small pipes. The MEP system will not include a hanger, except for being required.
  • LOD4: Create the 3D model of the MEP elements as required with the high level of details: Duct, Pipe, Cable tray will be modeled according to the fitting. For Valve, if the client requires LOD 4, the modeler will create the detailed model of the valve’s crank and the bolts.

Example of MEP elements

3. How do we meet the LOD and LOI requirements?

For each point cloud to BIM project, we should clarify the LOD and LOI requirements from the client at the beginning stage of the project. Not just stop at the model level, you need to clearly understand the LOD and LOI requirements of each object.

In the process of modeling, the modeler might use the 3D view, the section to check LOD, and use Schedule to analyze LOI requirements. Besides, the modeler themselves should improve their knowledge and stay updated with the information on LOD and LOI.

LOD requirement

A BIM project can have various LOD and LOI requirements that are applied to each area or position. So it’s necessary for the modeler to understand them to model exactly.

In conclusion

The terms have been devised as a means to help communication within a BIM project run more smoothly. So it’s important to understand and meet the exact LOD and LOI requirements. Hopefully, you’ll have a better understanding of what this means. If you still have questions on the topic, don’t hesitate to get in touch with us.

At ViBIM, we specialize in the delivery of BIM services and are confident to help you bring more value to your projects.

Scan to BIM - best practices
BIM news and trends, Scan to BIM

Best Practices for effective Scan to BIM process

We all know that the Scan to BIM process can provide a good starting point for the next stages. When done right, the design team can use Scan to BIM models to process their design; building owners might utilize them to effectively manage future changes or renovations. It might be said that they are beneficial to all stakeholders throughout the lifecycle of a project. So this post will walk you through a number of best practices we’ve learned to make efficient Scan to BIM.

1. Identify the purpose of the Scan to BIM model

It’s necessary to identify what the intention of making a Scan to BIM model is. Reflect existing structures of a building? Provide the model for the design process? Or coordinate the MEP trades? What stage of the project the model will be used.

  • For the design process: Quite a few design teams are using Scan to BIM model to kick off and manage the process early. So if you want to assist the design stage, later sufficient information and functional 3D BIM models should be created;
  • For the construction stage: If this is the case, ask whether you need to create a 3D model for trade coordination. The model can be shared between stakeholders to know the exact intricate they can encounter;
  • For retrofit projects: Create an as-built model that reflects the exact existing conditions of a building with a very high level of detail.

Knowing the exact who the end-user of the Scan to BIM is will help optimize the model for usability.

2. Define the project scope

It’s extremely vital to be aware of the project’s scope before getting started implementing the project. You can create a checklist to help the client easily identify the scope of work. In this way, they will appreciate your consultancy and give you a chance to show your expertise. Also, the following questions help you dig deeper into their project:

  • What exactly is to be modeled?
  • What’s the Level of Detail (LOD) and Level of Information (LOI) required for the model?
  • How will the model be used for the project?
  • What’s the project schedule?

BIM outsourcing services

Identifying the exact project scope will help to create an accurate 3D model that meets your client’s specifications. Besides, providing a clear definition of the scope can bring opportunities and value at all stages of the project.

3. Determine the required deliverables

As mentioned above, the result of the Scan to BIM process can be used for various different purposes. So you have to identify the deliverables you want to meet your customer’s expectations. It might be the Architectural, Structural, and MEP Revit file of a specific Level of Detail (LOD) and Level of Information (LOI). In some cases, the client may require some of the different formats of the file. The deliverable can even provide added value to the end-user.

Point cloud to BIM services

4. Collect more data than you need

Once you understand the project scope, the deliverables required; it’s important to collect all the needed information. It’s much easier to collect that additional information while you’re there the first time. You can delete data if it’s redundant than go back to collect the missing information. Remember the motto “more is more”.

Scan to BIM - point cloud

5. Find an experienced Scan to BIM team

Partner with a team that understands BIM technology, the industry standards, and methods of the construction process can assure successful results. They should be able to give you a suitable solution for your goals. The team should have extensive knowledge and experience in executing the Scan to BIM projects for various countries such as the US, UK. This enables you to maximize value and minimize costs.

In conclusion

Scan to BIM is a key component of the BIM process so it’s essential to create high-quality BIM models that are of value to the next project stages. Stakeholders of a project – surveyors, project managers, building teams, engineers, and designers, and architects – can confidently collaborate and benefit from Scan to BIM.

If you’re interested in this topic and want to discover more, don’t hesitate to get in touch with us. We are ready to help you bring more value to your Scan to BIM projects.

Functional model
Scan to BIM

Create a functional 3D BIM model for Scan to BIM project

As we know Building Information Modeling (BIM) is a digital 3D description of every aspect of a facility. It might consist of the physical and functional characteristics of the built asset. Nowadays, there are more and more stakeholders involve in a BIM project and work on the 3D model created. So creating functional BIM models become more vital in any Scan to BIM project. At ViBIM, we always assure that all BIM objects in the model have assigned with the correct function.

If you’re curious about this, the article is for you. We will help you clarify how we create the functional BIM models for the client’s Scan to BIM projects.

1. Why do you need the functional BIM model in the Scan to BIM project?

Several people think that the as-built models just should focus on reflecting exactly existing building conditions. However, we realize that adding the functionality to BIM models is really necessary. This is also one of the important parts that will benefit your BIM project now and many years to come.

In the process of modeling, adding parameters to all objects will help you categorize the internal and external functions of the object. Besides, thanks to automatically filtering parameters filtering of 3D view, the process of reviewing becomes quick, accurate, and intuitive. The objects with the correct functions will be of use to your design process and extracting the schedule of the objects becomes easier.

– The walls are assigned with functions “exterior or interior”:

functional wall model
– The floors are assigned with functions “exterior or interior”:

functional floor model
You can observe 3D-FUNCTIONS to see the corresponding color for the internal and external functions of the object in the project. This is an example of a wall that is assigned to the right functions.

functional wall model
On the other hand, this wall is assigned the wrong function.

functional wall model
The floor is modeled and assigned the correct function.

functional floor model

2. How BIM objects have assigned with the right function

2.1. Assign the right function (internal, external) to walls, floors, and stairs.

A functional BIM model will explain how the operations in the object model and the frame of the object are achieved. It focuses on the representation of the algorithmic or computational elements of the model. In the process of modeling, the modeler will assign functionality to the objects. So when opening the view “QA-3D-FUNCTIONS”, you might see that each object have their own functions (internal or external) that will be shown with the corresponding color.

Let’s see the following example for a better understanding. In our example, the blue symbolizes the internal functions of the object while green represents the external one. As can be seen in the image below, the wall object is assigned the function “interior”.

functional BIM models

2.2. All model data is modeled to an agreed tolerance

For renovation or retrofit projects, it is inevitable that some areas are out of shape. So in the process of creating as-built models, it’s necessary to consider the BIM deviation of all warped objects from the horizontal or vertical plane. Adding tolerance to the distorted, broken walls, floors helps you know exactly how the current status of this project is.
The deviation for each object is categorized against the one the following tolerance levels:

  • Blue represents the tolerance 0<x<15mm
  • Yellow represents the tolerance 15<x<30mm
  • Read represents the tolerance x>30mm

functional BIM model

There are several options for adding tolerance:

  • Assumed: Define the components in the model are assumed. This means that the survey data does not allow you to determine the shape/ size/ position and the exact existence of the element. We recommend these factors to need to be considered throughout the image and/ or the scanning data provided.
  • No level constraint: Define the components in the model has no reference attribute at the fixed level in Revit.
  • Damaged / Irregular: Identify the components in the model are significantly damaged and/or irregular in their shape. This leads to not model exactly in Revit.

Adding the tolerance to the objects also benefits your designing process and schedule of the object in the model. Especially, thanks to categorizing the tolerance level by color, we can observe quickly the status of the project throughout 3D DEVITATIONS.

In conclusion

We believe it’s necessary to create the functional 3D BIM model in the Scan to BIM project. If your model meets these criteria, it will be of benefit to your next project stages. In case, you want to discover more about the topic, don’t hesitate to get in touch with us.

At ViBIM, we specialize in the delivery of Scan to BIM services and are ready to help you bring more value to your projects. Let us know if we can help you with your BIM projects.

Revit tips and tricks, Scan to BIM

Join all walls in a continuous chain in Scan to BIM process

1. What can be understood?

Regarding walls, there will be lots of intersections where multiple walls connect together. So one of the important criteria we always follow is all walls shall be cleanly joined in a continuous chain and detached from top to bottom. At the position of numerous wall intersections, the modeler will create a continuous chain of thin walls around the intersection.

scan to BIM services -walls2. Why is this important?

In the Scan to BIM project, there are almost intersections and these areas need to be joined properly to create a clean model. This helps to avoid conflicts and clashes between walls in the model. What’s more, the joining of all walls will make the plan and the section become neater and more seamless. Creating a clean model makes the design process become easier and more efficient.

3. How does the right joined wall look like?

The section view below indicates the status of the walls when they are not joined. There will be overlap between the intersections and not be consistent.

Scan to BIM projects- walls don't be joinedOn the other hand, the walls that are joined will become seamless at the intersected points.

Scan to BIM projects - wall joinedThe following plan view demonstrates the status of the walls when they are not joined together.

Scan to BIM project - plan join walls
However, the model will become cleaner when the walls are joined together
Scan to BIM projects - walls joined

A note for the modeler is that:

  • Every time a wall is created in a Scan to BIM project, it’s necessary to analyze the cohesion of that object in the project;
  • Check objects regularly when using the sections and plans through points that have great complexity in the project model.

In conclusion

This is one of the most important criteria to create a clean 3D BIM model. At ViBIM, we always assure the deliverables meet this requirement in each Scan to BIM project. We believe if you do start to use these standards it will be fantastic for your BIM projects. If you’re interested in the topic, feel free to contact us to know it in detail.

BIM for Architects, Scan to BIM

Check Doors and Its Details Before Modeling in Scan to BIM process

1. What can be understood?

Understanding the client’s requirement is extremely important in the Scan to BIM project. So before getting started modeling, the modeler needs to assure that they clearly understand the technical requirements of each object in the model. For example, you’ve been asked to model doors by the client, then you must identify what LOD and LOI requirement is. If the project require high details, you can need to check what type of doors it is, determine door swing directions, and its details such as 3D linework, ironmongery, etc.

In the scope of this article, we assume that the model of the door is required with the LOD 300 and LOD 400. Later, in the process of creating a 3D BIM model, the modeler might use a 3D view or the plan to verify door swing directions.

  • The following example demonstrates using the plan view to check the door swing door

scan to BIM services - swing door

  • By comparison, we can also use the 3D view to check this:

scan to BIM services - swing door 3D view

2. Why is this important?

Knowing the exact requirements of doors will help us accurately model the status of the object. Besides, this also helps you meet the client’s requirements in terms of clearly showing the types of doors in the building and the door swing directions of the different door types. From that, you create an accurate 3D BIM model that is a vital starting point for the next design process.

Let’s take a look at the following image for better understanding:

scan to BIM services - detailed door

3. When should we perform this?

As mentioned, the model of the door will vary on the LOD and LOI requirements of the project. So any Scan to BIM project, you also should clearly understand the LOD and LOI requirements before modeling because they will impact on the final deliverables.

  • The door with LOD 100 and LOD 200 will include an opening pit only, not show the door swing direction.

scan to BIM services - door with lod 2

  • The door with LOD 300 will include the door swing direction, but not show the details of ironmongery.
  • The door with LOD 400 will include both the door swing direction and the details of ironmongery.

scan to BIM services - Door with LOD 3

Based on 3D TrueView, the point cloud data, the image to check the door swing direction as accurately as possible. As a result, if the project requires LOD 300 and LOD 400, you need to verify the door swing direction. Also, the project requires LOD 400, the modeler needs to detail 3D linework, ironmongery, and etc.

scan to BIM services - LOD 4
scan to BIM services - LOD 4

In conclusion

At ViBIM, we specialize in the delivery of Scan to BIM services and are ready to help you bring more value to your projects. If you want to discover more about the topic, don’t hesitate to get in touch with us. Our BIM experts are always here to help you answer any question until you get what you need.

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