Geometric Differences

Why are there differences in the placement of objects in different software?

Physical vs. Analytic model object position

This difference is most apparent between Physical, models which represent the position in space and relationship to it's neighbors required for construction and detailing including and required offsets and justifications, and Analysis models, those used to interrogate the structural properties of the model and make design choices.

The Physical model's that Konstru links to are Revit and Tekla. In the case of Tekla, only physical object locations are available. Revit is special in this regard as it is the only platform where both geometry positions can be represented and edited. Revit also includes a set of inherent 'analytical model connectivity' rules that will adjust the end point position of certain analytic objects in relationship to their parent physical representation to achieve overall connectivity.

As such, for users you wish to translate frequently from Revit to an analysis software, it's recommended to review the Reivt Analytic model connectivity from the very first day you begin modeling. You can learn learn more about this process in the link below.

Revit Analytic Model Connectivity Review

Credit: Autodesk - About the Revit Analytical Model

Common Structural Example of Geometric Difference

A very common example that applies to Revit Structural models with chevron type vertical braced frame condition as illustrated in the image below. At it's base the Brace objects start point is coincident with the Column it frames into. At the top of the Brace, the connection is more complicated, and you can see the two geometries diverge. This is due to the need to add gusset plate detailing to the physical model position, which has connected to the mid point of the spanning beam. The analytic model has connected to the mid point of the analytic representation of the spanning beam...which is top center justified.

Best Practice Modeling Tip: Revit to Analysis

Host your Beams on a Level (without offsets) and host your slab with an offset! Minimize the opportunity for Beams to leave their plane of existence.

How to fix it: Framing Repair

Even the most skilled modelers will struggle occasionally to maintain analytic framing connectivity across the entire project. In such cases, you have available a set of model repair tools which have been developed to help address large scale connectivity repairs.

Using a set of repair methodologies outlined in the image below, individually or in tandem as required most all framing connectivity issues can be addressed prior to your first upload.

Learn more about the Framing Repair toolkit at the link below.