BIM Models

A BIM digital model represents a building as 3D objects carrying information — geometry, materials, quantities — organized into progressive LOD levels, from LOD 100 to LOD 500. LOD 100 is a conceptual massing that places the project within its environment; LOD 500 is an as-built model, aligned with what is actually constructed and ready for operation. Between the two, each level adds geometric precision and data attached to each element. This BIM modeling Tunisia service covers design, construction coordination, and operation, with the LOD level chosen according to the intended use rather than applied by default.

How the Engagement Works

The engagement starts with gathering the data available on the building or site: existing drawings, surveys, and the owner's program. Each discipline — architecture, structure, MEP (Mechanical, Electrical, Plumbing) — is then modeled separately, at a level of detail consistent with the intended use of the model. The discipline models are federated into a single model that overlays the systems to make interferences between them visible. BIM clash detection is then run on this federated model: it is this step, not the modeling itself, that identifies collisions between networks, structure, and architecture. Detected clashes are documented and shared for resolution before final delivery.

What You Receive

Delivery includes the model in its native format as well as an IFC (Industry Foundation Classes) export, which makes the federated IFC model readable and checkable in another tool, independent of the originating software. Clash detection reports are included as well, listing the interferences identified between disciplines with their location in the model. The LOD levels of each deliverable are defined with the project upfront: LOD 200 or 300 is enough for feasibility studies or preliminary design, while LOD 400 or 500 matches a construction issue set or an as-built model for operation.

When You Need It

On a new project, the BIM digital model serves as a shared design support between stakeholders from the earliest sketches. During construction coordination, the federated model and its clash detection make it possible to anticipate interferences between networks and structure before the site works start, rather than discovering them on site. Once the building is delivered, the model can be reused for operation and facility management: equipment location, technical data attached to each element, maintenance tracking. These three uses do not call for the same scope of modeled disciplines, which shapes the LOD choice from the outset.

Frequently Asked Questions

What is LOD? Level of Development (LOD) describes how reliable the information carried by a model element is at a given stage, from LOD 100 (conceptual massing) to LOD 500 (as-built model); it does not measure the quality of the model but the use it is intended for at that point in the project. Why export to IFC? An IFC (Industry Foundation Classes) export makes the federated model readable by third-party tools, avoiding dependence on a single piece of software to view, check, or evolve the model. Do all disciplines need to be modeled from the start? No: the scope — architecture alone, or architecture, structure, and MEP federated together — is defined with the project's need, not applied by default.