The lighting team should correct the source CAD file so that it conforms to the project’s approved coordinate framework and then reissue it. External discipline files must be delivered with a predictable origin, orientation, and elevation that correspond to the architectural or designated site-control model. Correcting the source ensures that every recipient can link the file consistently and that subsequent updates retain the same placement.

Manually moving the linked CAD file in Revit creates an unmanaged instance offset. Although the file may appear aligned temporarily, reloading, replacing, or distributing it can reproduce the original problem or create inconsistent positioning among team members. Adding gridlines may help visually diagnose the offset but does not establish a reliable coordinate relationship.

Acquiring coordinates from the misaligned lighting file is particularly inappropriate because it would redefine the host model’s shared-coordinate relationship based on a non-authoritative and incorrectly positioned reference. The architectural or site model should remain the approved source of project positioning.

The BIM manager should provide the lighting team with the agreed coordinate protocol, reference model, control points, units, and required vertical datum, then validate the corrected file before accepting it for coordination.

Reference topics: Consultant file requirements; shared-coordinate governance; CAD-link positioning; authoritative coordinate sources; model exchange; coordination quality control.

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