How LOD 350 Benefits BIM for Building Construction

BimForum 2013 LOD Spec

The BIMForum recently released the 2013 Level of Development (LOD) Specification, which includes a new LOD level – LOD 350. Prior to this development, the AIA G202 LOD definitions left a lot of room for interpretation by designers and engineers, thus creating uncertainty about model integrity by downstream users. General contractors often recreate models from scratch because they can’t rely on the quality of models coming from other project team members. The new 2013 Level of Development Specification changes all this. Continue reading…

Why You Should Be Modeling in Decimal Units

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Modeling for the field and/or layout demands more precision than your standard visualization model. If you’re based in the US, this is especially important. In Revit, for example, the units may be set to show up to 1/16 or 1/8 inches of precision. This means any dimension less than 1/8 of an inch will simply round up – a nice plus if you’re creating sheets but a shock to anyone using a model for layout.  Continue reading…

How to Clash Scan Data

how to clash scan data

Autodesk Navisworks was mentioned in a previous post as our primary clash detection tool. Aside from simply bringing in the point cloud and visually confirming the models match, we can also use the Clash Detective window within Navisworks to coordinate what’s been built versus what’s about to be installed with significantly more intelligence than a walk-through of the model. Continue reading…

Using Point Clouds in Clash Detection

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We use Autodesk Navisworks almost exclusively as our primary clash detection tool. However, up until about a year ago, we have only worked with “projected” models – that is, shop drawings in 3D format that convey what the project will look like once that particular system is installed. Combining all of these files into Navisworks usually results in what’s known as “clashes,” or conflicts between systems where certain elements are competing for the same space. Continue reading…