Direct Answer
AutoCAD can produce 2D shop drawings but lacks the parametric 3D model that makes Tekla valuable — no automatic BOM generation, no DSTV/NC1 file export, no integrated clash detection, and no model-to-drawing synchronization. AutoCAD detailing is slower, more error-prone, and unsuitable for projects requiring BIM deliverables. For any project of meaningful scale, Tekla or SDS/2 is the professional standard.
Full Explanation
AutoCAD steel detailing was the industry standard before 3D parametric platforms matured in the mid-2000s. Some shops still use AutoCAD for simple miscellaneous steel items (handrail, ladders, simple platforms) where a 3D model provides limited benefit. For structural frames of any complexity, the advantages of 3D detailing are overwhelming: BOM accuracy, DSTV output, clash detection, and the ability to update drawings automatically when the model changes. AutoCAD detailing cannot produce DSTV files, which is a fundamental disqualifier for CNC-equipped shops.
What This Means for Your Shop
If a detailer offers to detail your project in AutoCAD to reduce cost, the savings are illusory. The lack of model-generated BOM, DSTV files, and clash detection will cost you more in material errors, CNC programming time, and field RFIs than you save on detailing fees.
Common Mistakes
Accepting AutoCAD shop drawings on a project that requires IFC coordination. AutoCAD cannot export IFC — you will have no structural model to contribute to the federated coordination model.
Recommended Process
Specify in your detailing RFP that the platform must be Tekla Structures or SDS/2, and that deliverables must include a 3D model file, model-generated BOM, and DSTV/NC1 files. This eliminates AutoCAD-only firms from the competition.