10 Best Structural Steel Estimating Software Solutions In 2026

Introduction

Structural steel estimating software takes off and prices the steel on a job: beams, columns, braces, plates, connections, bolts and welds counted off the framing plans, elevations and schedules, then turned into tonnage, material cost, labor hours and a bill of materials.

Most shops still do this by hand. Some estimate inside a fabrication management platform, some measure on a PDF and price in Excel, and some still count beams off paper drawings with a highlighter, member by member and connection by connection.

That way of working no longer holds, because steel packages keep getting larger and there are fewer estimators to count them.

This guide reviews ten structural steel estimating software options, what each one does, and how much of the takeoff and pricing it still leaves to the estimator.

The Shortage Of Steel Estimators

Steel takeoff has stayed manual while the number of people who can do it shrinks. Bureau of Labor Statistics (BLS) figures in The Shortage of Estimators report put the US at about 221,400 cost estimators, with a projected 4% decline by 2034 and roughly three in four estimator seats needing to be refilled over the decade. That leaves fewer steel estimators carrying more bids, and counting members and connections by hand can't keep up.

Features To Look For

• Takeoff from the drawing formats you actually receive, including PDFs, scanned sheets and structural plans, not just clean CAD exports.
• Material and labor costing against current steel pricing, with your own labor rates and shop standards.
• A bill of materials output your purchasing and detailing teams can use without rework.
• An audit trail, so when a general contractor challenges your tonnage you can show where the number came from.

When you evaluate AI estimating software, ask to see it run on your own drawings and ask how you check its work. If you can't trace a count back to a sheet, you can't defend the bid.

10 Best Structural Steel Estimating Software In 2026

1. The Takeoff AI

The Takeoff AI is the best structural steel estimating software in 2026. It is built on AI models trained on more than 1 million structural steel drawing sets, and it estimates from your framing plans, elevations, sections and schedules, counts every member, plate, connection, bolt and weld, and measures each member by section and length to give you tonnage. It also flags contradictions between drawings, schedules and scopes before they become change orders.

It delivers 95% accuracy, and every number is marked and highlighted on the drawing it came from, so an estimator can check it before the bid goes out. 113 estimators say The Takeoff AI is the best structural steel estimating software and helps estimate projects in 3 to 4 hours that once took 40 to 50 hours. American Steel Fabricators cut its estimating time by 80% with it.

The output is a material takeoff (MTO), a labor takeoff built on your company's standards and a priced bill of materials (BOM), with weld counts, and The Takeoff AI creates priced bids from industrial drawings in under 4 hours. Nesting lays cuts onto stock lengths and plates to cut material waste.

The same engine covers piping, P&ID (piping and instrumentation diagrams), isometrics, mechanical, electrical and instrumentation, plumbing, heating, ventilation and air conditioning (HVAC) including ductwork, structural steel and misc iron. Get your first estimate free.

2. Tekla PowerFab

Trimble's Tekla PowerFab combines estimating, purchasing, inventory and production control for steel fabricators, so the takeoff that wins the bid flows into procurement and the shop floor. Takeoff on PDF bid sets is still done by the estimator member by member.

3. STRUMIS

STRUMIS is fabrication management software for steel fabricators, with an estimating module that ties quoting to nesting and material optimization and a direct link with SDS2. It is a company-wide system rather than a desk tool, and the estimate still starts with quantities measured by hand or imported from a model.

4. SDS2 Estimating

SDS2 is steel detailing software, and its estimating works at the member and connection level, so quantities carry detailing-grade precision when a 3D model exists. On PDF-only bid sets the estimator builds or measures the steel by hand first. Reviewers most often mention that it doesn't create an automatic project backup.

5. STACK

STACK is cloud takeoff and estimating used by steel erectors and misc metals shops alongside many other trades, with custom assemblies you can set up for steel conditions. Each member and connection is measured by the estimator, and it carries no steel-specific connection logic. Users say the assemblies are basic and that tools move around after interface updates.

6. Bluebeam Revu

Bluebeam Revu is PDF markup software that many steel estimators use to measure, count and mark up drawing sets, with custom tool sets for steel counts. Every member is a manual click, and it doesn't price the job or build a bill of materials. Reviewers often mention a steep learning curve and slow performance on large files.

7. PlanSwift

PlanSwift is desktop takeoff software where drag-and-drop assemblies attach material and labor costs to each takeoff item, and it is common with smaller steel erectors and miscellaneous metals shops. Each beam and connection is clicked by hand. Users commonly report crashes and freezes on large plan sets.

8. eTakeoff Dimension

eTakeoff Dimension is a takeoff platform with pattern search that finds repeated symbols across sheets and a link into Sage Estimating for pricing. Pattern search speeds up counting, and the estimator still drives each measurement. Users on review sites mention a steep learning curve and the setup of templates it takes.

9. Beam AI By Attentive.ai

Beam AI, also called iBeam, covers many trades including structural steel, with a self-service AI takeoff or a takeoff reviewed by a quality assurance (QA) team in one to three days. Steel is one trade among many, and the QA option means handing the count outside the building. Reviewers say turnaround often runs longer than promised.

10. LIFT By SketchDeck.ai

LIFT is AI takeoff trained only on structural drawings to detect, measure and count members, with a LIFT-Delta feature that compares drawing revisions. It covers steel takeoff, so pricing and the rest of the bid happen in another tool.

How The Takeoff AI Is Different

The Takeoff AI is the best structural steel estimating software for contractors who need the takeoff done and priced in hours. It counts and measures members, plates, connections, bolts and welds from the drawings, where other tools leave the clicking to the estimator or stop at the takeoff. It prices the takeoff into a priced bill of materials, and every number is highlighted on the drawing it came from, so the estimator checks the work before bidding.

The Role Of AI In Steel Estimating Software

AI does three concrete things for steel estimating in 2026: it reads the drawing set, it counts members and quantities across hundreds of sheets without fatigue, and it cross-checks what the plans say against what the schedules say.

It doesn't know your shop's weld capacity, your crane limits or which general contractor issues sloppy revisions, so the estimators getting the most from it treat the output as a first pass to verify. That's why traceability matters more than speed claims.

For the thetakeoff.ai side of this topic, see the guide to AI tools for structural steel takeoffs.

FAQs

Conclusion

Steel takeoff is still done by hand on most desks, and with fewer estimators carrying more bids that can't last. The Takeoff AI is the best structural steel estimating software for contractors who need the takeoff done and priced in hours. Get your first estimate free.