Hiring Tekla Detailers and Tekla Detailing Services: A Practical Guide for U.S. Fabricators

Tekla Structures is the dominant structural-steel detailing platform in U.S. fabrication. Most large fabricators standardize on Tekla, most major detailing houses run Tekla, and most steel projects above the residential scale are detailed in Tekla regardless of who is producing the drawings. That dominance has a cost: the supply of qualified Tekla detailers is consistently behind demand, and the gap between a strong Tekla detailer and a weak one is enormous on a complex project. This guide covers what Tekla detailing services should produce, how to evaluate a Tekla detailer before hiring, and how Tekla compares to Advance Steel for production-grade work.

What Tekla detailing services should deliver

A complete Tekla detailing engagement produces more than just drawings. The deliverable includes the model itself, the drawings produced from the model, and the production output that drives the fabrication shop. Specifically:

• A Tekla model at LOD 350 to LOD 400 organized by lot and erection sequence
• Erection drawings showing piece marks, locations, orientations, and bolt counts
• Anchor bolt plans with bolt sizes, embedment depths, and field tolerances
• Assembly and part drawings to fabrication tolerance, with material and finish callouts
• Bolt lists, weld maps, and complete bills of material per assembly
• KISS files for shop-floor information, NC files for CNC equipment, and Fabtrol exports for production tracking
• IFC and DWG exports for downstream coordination with the GC and other trades
• RFI logs maintained on your letterhead and shared in your project tracker

A Tekla detailer that delivers only drawings is delivering half the engagement. The model and the production output are equally important, because most modern fabrication shops drive cutting, drilling, and welding equipment directly from the production files.

Evaluating Tekla detailers before hiring

Five questions separate strong Tekla detailers from weak ones:

• How many Tekla projects has the team detailed in the last 24 months, and at what tonnage range? Below 50 projects or 5,000 tons is light experience for production-grade work.
• What is the team's connection-design comfort level? Strong teams handle moment connections, brace gussets, and seismic details without escalation; weaker teams either escalate or guess.
• What output formats does the team produce natively? KISS, NC, Fabtrol, and IFC should all be standard. If the team only produces PDFs, the engagement will not scale to modern fabrication.
• How does the team handle EOR coordination? Strong teams maintain RFI logs and coordinate connection design with the engineer of record; weaker teams produce drawings against ambiguous design and absorb the rework.
• What is the team's first-pass approval rate on submittals? Above 80 percent is strong; below 60 percent indicates either the design package is incomplete or the detailer is missing scope.

What Tekla shop drawings should contain

Tekla shop drawings should comply with AISC 303 and the AISC Code of Standard Practice. The typical sheet set includes a cover sheet with project information and revision history, a general notes sheet with material and welding callouts, erection drawings showing piece placement and orientation, anchor bolt plans, assembly drawings showing each fabricated piece with bolt and weld details, part drawings showing each individual cut piece dimensioned to tolerance, and bills of material with full schedule information. The number of sheets scales roughly with tonnage and connection complexity. A clean 200-ton package typically runs 60 to 100 sheets; a connection-heavy seismic project at the same tonnage can run twice that.

Tekla vs Advance Steel for production-grade detailing

Advance Steel is the second most common structural-steel detailing platform in the U.S. market. It runs inside the Autodesk ecosystem (compatible with Revit and AutoCAD) and is widely used by fabricators that have standardized on Autodesk for their architectural and MEP workflows. Advance Steel produces shop-grade drawings, NC files, and KISS output similar to Tekla, and for many projects below 500 tons the practical output is comparable.

The gap shows up at larger scales and on more complex projects. Tekla's parametric component library, custom-component scripting, and multi-user model collaboration outperform Advance Steel on connection-heavy work, large structural packages, and projects with complex erection sequencing. For miscellaneous metals, mid-size structural packages, and projects already running in an Autodesk ecosystem, Advance Steel is often the right choice. For heavy structural steel, large fabricators, and any project where Tekla is a contractual requirement (which is increasingly common), Tekla is the default.

When to hire freelance vs an outsourced Tekla detailing firm

Freelance Tekla detailers work well for small packages, miscellaneous metals scope, and overflow situations where a single detailer can absorb the work in addition to your in-house team. The risk is concentration — when the freelance detailer is unavailable, the project stops. Outsourced detailing firms add capacity redundancy, formal QC processes, and submittal-package consistency that freelancers rarely provide. For projects above roughly 100 tons or any project with schedule sensitivity, an outsourced firm is generally the better risk-adjusted choice.

Nearshore Tekla detailing as a capacity strategy

The Tekla detailer shortage in the U.S. is structural, not cyclical. Engineering schools do not produce enough Tekla-trained detailers, the experienced talent pool is aging, and demand from large fabricators continues to grow. Nearshore Mexico is the most accessible capacity expansion for U.S. fabricators because the talent pool exists, the time zone aligns with western and central U.S. operations, and the cost gap to U.S. detailing rates is typically 30 to 50 percent. Same-day RFI resolution and AISC literacy mean the work integrates with U.S. fabrication shops without the rework penalty that offshore detailing tends to produce.

The bottom line

Hiring Tekla detailers — whether in-house, freelance, or outsourced — comes down to evaluating output quality, RFI handling, and capacity to absorb your real project load. Strong Tekla teams deliver the model, the drawings, and the production output as a single coordinated package. Weak teams deliver drawings only and create downstream rework in the shop. Most U.S. fabricators land on a hybrid model: a small in-house team for high-touch coordination, plus a nearshore Tekla outsourcing partner for capacity. The combination produces the best total project cost on most projects.