Architectural Steel Detailing: A 2026 Guide

Table of Contents

• What Architectural Steel Detailing Actually Involves
• How It Differs From Structural Detailing
• The Steel Detailing Process: From Design Intent to Erection Drawings
• Shop Drawings vs. Erection Drawings
• Steel Shop Drawing Requirements and the Submittal Process
• Steel Detailing Software Tools: Tekla, Revit, and BIM Workflows
• AISC Standards for Steel Detailing: What Fabricators Must Follow
• Common Detailing Errors and How to Prevent Costly Rework
• Outsourcing vs. In-House Detailing: A Cost-Benefit Look
• Conclusion

Last Updated: September 27, 2026

What Architectural Steel Detailing Actually Involves

Architectural steel detailing turns an architect's design intent into fabrication-ready drawings a shop can build and a crew can erect without guesswork. At Antonio's Metal Works, we've spent over two decades translating complex architectural plans into steel that fits the first time.

The work covers a defined set of deliverables:

• Shop drawings for every steel member, connection, and assembly
• Erection drawings that show the field crew how pieces go together
• Anchor bolt plans coordinated with the foundation package
• Material takeoffs and cut lists for the fabricator
• CNC data for automated fabrication equipment

How It Differs From Structural Detailing

Structural detailing covers the load-bearing frame, beams, columns, braces, trusses, and answers "will this stand up?" Architectural detailing answers "does this match the design, and can it be built and installed as drawn?"

The Steel Detailing Process: From Design Intent to Erection Drawings

The detailing workflow runs from contract documents to fabrication-ready output: review the documents, build a 3D model, run clash detection, generate shop and erection drawings, then push approved data to the shop.

Here's how the phases typically break down:

1. Document review. The detailer studies the architectural and structural drawings, notes dimensions, and flags gaps early.
2. 3D modeling. Members, connections, and plates are modeled in detailing software, often built from a Revit or Tekla model.
3. Clash detection. The model is checked against other trades (mechanical, electrical, plumbing) to catch conflicts before fabrication.
4. Drawing generation. Shop drawings and erection drawings are produced from the model.
5. Submittal and review. Drawings go to the engineer of record and architect for approval.
6. Fabrication release. Approved drawings feed CNC data and the shop floor.

Shop Drawings vs. Erection Drawings

Shop drawings are the fabricator's instructions: every member's dimensions, cut lengths, hole locations, welding symbols, and bolt connections, detailed enough to build the piece in the shop.

Steel Shop Drawing Requirements and the Submittal Process

Steel shop drawing requirements vary by project but share a common core: member sizes, connection details, dimensions, welding symbols, bolt types and counts, material specs, and piece marks tying every component to the erection plan.

Watch Out Skipping a formal submittal review to save a week often costs far more. Unreviewed connection details that reach the shop can require re-fabrication, and correcting steel after it's cut is far more expensive than correcting a drawing before it's approved.

Steel Detailing Software Tools: Tekla, Revit, and BIM Workflows

Steel detailing software splits into dedicated detailing platforms and BIM authoring tools. Tekla Structures is built for steel detailing, with deep connection libraries, automated drawing generation, and native CNC output. Revit handles BIM coordination and works well when the whole team already models in it. SDS2 and Advance Steel sit alongside Tekla in the dedicated camp.

How the Model Becomes CNC Machine Code

Detailing software doesn't just produce drawings, it produces the machine data that drives the shop floor:

1. Model the member. Every plate, hole, cope, and weld is defined in 3D with real dimensions.
2. Assign the fabrication method. The detailer (or the shop) tags each piece with the machine that will process it, a beam line, a plasma cutter, a drill line, a band saw.
3. Generate the NC file. The software exports machine-specific code, often in formats like DSTV/NC1 for beam lines, or a nested plate file for a plasma table.
4. Run the machine. The beam line reads the file and cuts, drills, and copes the member to the tolerances the model specified.

What to Check Before You Trust the Model

Not every BIM model is fabrication-ready. Before a model is released to CNC, a competent detailer verifies:

• Level of Development (LOD). A coordination model may be LOD 300 (approximate geometry); fabrication requires LOD 400, where members are modeled as they will actually be built, with connections, holes, and welds.
• Connection design responsibility. Confirm whether the engineer of record is designing connections or delegating them to the detailer, this changes what the model must contain.
• Coordinate system and units. A model built in metric and exported to an imperial shop is a silent source of scrap.
• Piece-mark consistency. Shop and erection drawings must be generated from the same model so marks never diverge.

Interoperability: IFC and the Coordination Handoff

When the architect models in Revit and the detailer works in Tekla, the handoff usually runs through IFC (Industry Foundation Classes), an open format both tools read. IFC carries geometry and some metadata, but connection logic, fabrication attributes, and machine data stay inside the detailing platform, which is why the detailer owns the fabrication model.

Pro Tip Ask your detailer which software the fabrication model will be built in and whether the shop's CNC equipment can read its native output. A model that can't drive the machines is just a very detailed picture.

Matching Software to the Project

There's no single right answer. A few rules of thumb:

• Heavy industrial or complex geometry: Dedicated platforms like Tekla or SDS2, where connection libraries and CNC output are native.
• Team already fully in Revit: Revit detailing can work, but confirm the shop's CNC pipeline accepts the output or plan for a translation step.
• Mixed-trade coordination: BIM authoring tools shine when mechanical, electrical, and plumbing are all in the same model.
• Small or repetitive work: The overhead of a full BIM workflow may not pay off; 2D detailing in AutoCAD still has a place.

AISC Standards for Steel Detailing: What Fabricators Must Follow

AISC standards for steel detailing set the rules for connections, tolerances, and drawings. The American Institute of Steel Construction publishes the codes and specifications governing structural steel design and fabrication, and detailers work within them on every project.

The standards touch nearly every drawing decision:

• Connection design and detailing conventions
• Fabrication and erection tolerances
• Welding symbols and bolt connection standards
• Drawings and specification requirements

Pro Tip Ask your detailer which edition of the AISC specification the project is being detailed to, and confirm it matches the one referenced in the structural drawings. A mismatch between the two is a quiet source of RFIs and rework that rarely gets caught until the shop is already cutting.

Common Detailing Errors and How to Prevent Costly Rework

The most expensive detailing errors survive review and reach the shop. A wrong dimension on a column base plate, a missing stiffener, or a connection that can't be accessed with a wrench all become field problems.

Outsourcing vs. In-House Detailing: A Cost-Benefit Look

Most guides treat this as a simple capacity question. It isn't. Outsourcing versus in-house detailing is a cost-benefit problem with four moving parts, labor, software, coordination overhead, and rework risk, so compare total cost of ownership, not the hourly rate.

The Cost Buckets Nobody Adds Up

In-house detailing carries costs that don't show up per drawing:

• Salaries and benefits for detailers, plus a checker or lead to review their work.
• Software licenses. Dedicated detailing platforms are priced per seat, per year, and a single license can run into the thousands annually.
• Hardware and IT. Detailing models are large; workstations need the memory and graphics to open them without stalling.
• Training and turnover. Detailing is a specialized skill; when a detailer leaves, the replacement's ramp-up time is a real cost.
• Idle capacity. In a slow quarter, in-house detailers are still on payroll.

Outsourced detailing

• Per-project or per-hour fees that scale with volume.
• Coordination overhead. Time spent on calls, markups, and back-and-forth that wouldn't exist if the detailer sat down the hall.
• Rework risk. A remote detailer who never walks the shop may detail a connection that's technically correct but impractical to build.
• Schedule risk. A vendor juggling multiple clients may not turn revisions as fast as an in-house team.

A Decision Framework That Actually Decides

Run the decision through these questions in order:

1. Is your detailing volume steady or spiky? Steady, high volume favors in-house, you amortize the fixed costs. Spiky or project-based volume favors outsourcing, which absorbs peaks without permanent overhead.
2. How complex is the geometry? Complex, non-repeating connections reward a detailer who knows your shop's capabilities. That knowledge is easier to build in-house.
3. How often does the design change? Frequent revisions favor in-house, where a change can be modeled and re-issued the same day. Outsourced revisions add a communication cycle.
4. Do you have a checker? Whoever details, someone must check. If you can't staff a checker in-house, outsourcing to a firm with its own QC process may be safer than an unchecked in-house detailer.
5. What's your rework tolerance? If a single mis-detailed connection can shut down a crane pick, the coordination premium of a close-working partner is worth paying.

The Hidden Cost: Coordination, Not the Fee

The line item that sinks most comparisons is coordination. A detailing fee is easy to quote; the cost of a misread spec is not. A detailer who works directly with the fabricator and architect, in-house or outsourced, catches more errors before they cost money. One who only receives PDFs and returns PDFs has no feedback loop.

When Outsourcing Makes Sense, and When It Doesn't

Outsourcing tends to win when:

• Workload is variable or project-based.
• The scope is well-defined and repetitive (standard connections, straightforward frames).
• You need to scale up quickly for a single large project.
• You lack in-house detailing staff and don't want to build the function.

In-house tends to win when:

• Volume is high and steady enough to keep detailers busy.
• The work involves complex, non-standard connections that depend on shop-specific knowledge.
• Schedule pressure demands same-day revisions.
• Detailing accuracy is a competitive differentiator you want to control directly.

Key Takeaway The real question isn't "in-house or outsourced", it's "who owns the feedback loop between the model, the shop, and the field?" Whoever holds that loop determines how many errors get caught before steel is cut.

If your project needs a partner who can interpret complex architectural plans and detail them correctly the first time, that's the work Antonio's Metal Works does every day. Our C-51 Structural Steel Contractor License and two decades of experience mean our drawings match the design intent, not approximate it.

Frequently Asked Questions

What is the difference between structural and architectural steel detailing?

Structural detailing focuses on the load-bearing frame: columns, beams, braces, and connections sized by an engineer. Architectural steel detailing covers the visible and interface elements, such as exposed trusses, stair stringers, railings, and fascia supports, where finish tolerances and alignment with other trades matter. On most commercial projects the two overlap, and the detailer must reconcile both sets of requirements in the same shop drawing package.

What software is commonly used for architectural steel detailing?

Tekla Structures and Autodesk Revit dominate, with SDS2 and Advance Steel used in many fabrication shops. These tools produce 3D models that generate shop drawings, erection drawings, and CNC data for automated fabrication machinery. The choice usually comes down to what the fabricator's shop equipment reads and what the project's BIM coordination requires, not which tool is theoretically better.

What are the industry standards for steel detailing in the US?

The AISC Code of Standard Practice for Steel Buildings and Bridges (ANSI/AISC 303) sets the baseline for drawings, tolerances, and the responsibilities of the owner, engineer, fabricator, and erector. AISC 360 covers structural design requirements, and AWS D1.1 governs welding symbols and procedures. Detailing that ignores these standards tends to fail at the submittal review stage or, worse, on site during erection.

How do I know a fabricator can handle complex architectural steel detailing?

Ask for the license first. In California, structural steel work requires a C-51 contractor license, and you can verify it through the Contractors State License Board. Then ask for shop drawings from past projects similar to yours and, if possible, visit a completed job. A fabricator who can walk you through a specific connection detail and explain why it was drawn that way has real detailing capability, not just a sales pitch.