A beam modelled once in a dedicated steel detailing platform produces its shop drawing, bolt list, and CNC data from the same source. In a general-purpose drafting package, each of those outputs is typically drawn separately, and every extra copy is a chance for the documents to disagree.
That difference is why steel detailing software matters to anyone who specifies, fabricates, or builds from detailed steelwork. This guide compares the main platforms, explains why Tekla Structures is so widely used by professional detailers, and sets out what to check before choosing a platform or a detailing provider.
Key Takeaways
- Steel detailing software builds one 3D model that generates shop drawings, assembly drawings, bills of material, and CNC data, which keeps outputs consistent when the design changes.
- The main platforms are Tekla Structures, Autodesk Advance Steel and SDS2, with Revit mainly used for multidisciplinary BIM coordination rather than fabrication-level detailing.
- Tekla Structures is widely used by professional detailers for its fabrication-level modelling, reusable connections, DSTV NC output and IFC exchange, though it is generally regarded as costing more and taking longer to learn than some alternatives.
- The right platform depends on what the fabricator can use, the complexity of the project and its coordination needs, not on feature lists alone.
- Software does not determine compliance or quality. Model checking, standards knowledge and RFI discipline decide whether drawings are fabrication-ready.
What Steel Detailing Software Actually Does
Steel detailing software builds a fabrication-level 3D model of a steel structure: every member, plate, bolt, and weld, positioned to the dimensions a workshop will cut and fit. Connections are applied from parametric component libraries and adjusted to the requirements the engineer has specified.
The outputs are then generated from that model rather than drawn separately. Assembly and single-part fabrication shop drawings take their dimensions, piece marks, and bolt counts directly from the model, so they stay consistent when geometry changes. Bills of material, cutting lists and bolt lists come from the same source.
The same model also drives the data downstream. NC files in DSTV format feed CNC beam lines and drilling machines, general arrangement drawings show erectors where each marked piece goes, and an IFC export shares the model with the builder’s coordination team.
Software automates the output, but it does not remove the underlying steps of the steel detailing workflow, from reviewing design documents and raising requests for information (RFIs) through to approval and fabrication release.
The Main Steel Detailing Software Platforms Compared
Several platforms are used for steel detailing. Tekla Structures and Autodesk Advance Steel are generally regarded as the two most widely used in Australia, SDS2 is more closely associated with North America, and Revit is used mainly for multidisciplinary coordination.
Tekla Structures
Tekla Structures, developed by Trimble, models steel, concrete, and mixed-material structures in a single environment and is built around fabrication-level detail. It generates drawings and reports from the model, exports NC files in DSTV format for CNC machines, exchanges models through IFC, and supports large models with multiple users working at once.
Autodesk Advance Steel
Advance Steel is built on AutoCAD, which suits drafting teams already working in Autodesk tools. It includes parametric steel connections, automatic shop and general arrangement drawings, bills of material and DSTV CNC files, and it synchronises with Revit. It is part of Autodesk’s AEC Collection.
SDS2
SDS2, from Allplan (part of the Nemetschek Group), centres on automatic connection design as the model is built and has been most closely associated with the North American market. Allplan launched it in Germany in June 2026. Teams outside North America should confirm local support, section libraries and drawing standards before committing.
Revit
Revit is widely used to model the structural design and coordinate it with architecture and services. Fabrication-level detailing is normally carried out in a dedicated steel platform, with models exchanged between the two. Advance Steel, for example, has a direct link to Revit.
Other platforms exist, often tied to a particular region, sector, or fabricator. They are worth considering mainly where a fabricator’s existing workflow already depends on them.
Why Tekla Structures Is So Widely Used by Professional Detailers
No public survey measures detailing software use precisely, so “most” is best read as a consistent industry pattern rather than a measured figure. Published comparisons and detailing practice both point the same way, and the reasons are practical.
- Fabrication-level modelling: every part, hole, bolt and weld is modelled at the detail a workshop needs, so drawings and data come from the model rather than from interpretation.
- Reusable connections: a library of system components covers common connections and plates, and teams can build custom components to match a fabricator’s preferences, which speeds up repetitive detailing without removing control.
- Machine-ready output: DSTV NC files for CNC machines, configurable reports (including Excel output introduced in Tekla Structures 2026) and drawing templates reduce manual handling between the office and the workshop.
- Open exchange: Tekla Structures imports and exports IFC, the open standard maintained by buildingSMART International, so the steel model can be coordinated with architectural and services models built in other software.
- Scale and mixed materials: large models can be worked on by several users at once, and steel, precast, and reinforced concrete can be modelled in the same environment, which helps where steel meets concrete.
Recent releases keep extending this. Tekla Structures 2026 arrived in March 2026, and its September 2026 service pack added support for buildingSMART’s Information Delivery Specification (IDS) in IFC property set definitions.
There are trade-offs. Tekla Structures is generally regarded as costing more and taking longer to learn than some alternatives, and for a team already standardised on AutoCAD working on simpler projects, Advance Steel can be the more practical choice.
How to Choose Steel Detailing Software for a Project
The right choice depends less on feature lists than on how the project will be delivered. Four checks cover most decisions.
- What the fabricator can use: confirm the NC format their machines accept (DSTV is common), the drawing formats they expect, and whether their fabrication management system integrates with the detailing platform.
- Project complexity: straightforward portal frames suit most platforms, while complex geometry, mixed materials, or heavy multi-trade coordination favour platforms built around large, highly detailed models.
- Coordination needs: check whether the builder’s BIM team expects IFC or native models, and how often the steel model will be exchanged.
- Local practice: confirm the section libraries, drawing templates and weld symbols match Australian practice and the project specification.
When detailing is outsourced rather than held in-house, the platform matters less than the team operating it. It is reasonable to ask any provider of structural steel detailing which platform and version they use, how models are checked before release, and which output formats they deliver.
Why the Software Is Only Part of the Result
Two detailers using the same platform can produce very different drawings. Accuracy depends on the quality of the incoming design information, the connection assumptions agreed with the engineer, and the checking that happens before drawings are released.
The same applies to compliance. AS 4100 governs the design of steel structures, and AS/NZS 5131 sets out construction categories, tolerances, inspection and documentation requirements for fabrication and erection. A platform can carry weld details and piece marks, but it cannot choose the construction category or confirm that a connection is adequate. Those decisions sit with the engineer and the project specification, and Standards Australia publishes both standards and is the authoritative source for the current editions.
The practical safeguard is process: independent checking of the model, disciplined revision control, and RFIs raised early rather than assumptions built into steel.
Frequently Asked Questions
Does steel detailing software design the structure?
No. Detailing platforms model and document a design that has already been engineered. Structural analysis and member design are normally carried out in separate analysis software, and the results reach the detailer through the engineer’s drawings, the specification and, in some workflows, a shared model.
Do fabricators need to use the same software as their detailer?
Usually not. A detailer delivers drawings, bills of material, and NC files that any workshop can use, along with an IFC model for coordination. Sharing the native model is only necessary if the fabricator wants to edit it directly.
Is there free steel detailing software suitable for commercial work?
Not in the sense most people mean. Vendors such as Trimble offer free student subscriptions for learning Tekla Structures, but the terms prohibit commercial use, and the saved models cannot be opened in commercial versions. General-purpose free drawing tools typically lack the connection libraries, automatic drawing generation, and NC output that fabrication-level detailing relies on.
Which software version should a project use?
Agree it in the project’s BIM execution plan before modelling starts. Tekla Structures is updated annually, with the 2026 release arriving in March 2026, and a model saved in a newer version cannot be opened in an older one. If several parties will exchange native models, they need to work in the same version. Otherwise, IFC is the safer exchange format.
Can steel detailing software check for clashes?
Yes. Detailing platforms can flag collisions within the steel model, and models can be exchanged with the wider project team for coordination in tools such as Navisworks. Clash results still need engineering judgement, since a flagged clash may be acceptable, and a missed one may sit in a discipline’s model that was not included in the check.
Choosing a Platform and a Detailing Team That Fit the Project
Steel detailing software is where design intent becomes fabrication data, which is why the platform shapes accuracy, turnaround, and what a workshop can do with the files. Tekla Structures is widely used by professional detailers because it models at fabrication level, produces machine-ready output, and exchanges data openly, while Advance Steel, SDS2, and Revit each suit particular workflows.
For most projects, the better question is not which platform is best in the abstract, but which one the fabricator, builder, and engineer can all work with, operated by a team that checks its models properly. Agreeing on the platform, version, and output formats early removes most of the avoidable friction.
If your project needs fabrication-ready steel detailing and shop drawings produced from a coordinated Tekla Structures model, Citotech’s detailing team can take your design documents through to drawings, bills of material, and IFC files your fabricator and builder can use. You can reach out with your project details to talk through scope, formats, and timelines before modelling starts.
