Drop in a steel fabrication drawing, whether scanned, marked-up or revised, and get back a bid-ready weight takeoff in minutes: AI-extracted, engineer-approved. Tonnexis doesn't replace your engineers; it removes the manual takeoff work. Live today for estimation, with quotation, ERP and procurement on the roadmap.
More bids, same headcount. Tonnexis does the bid-ready weight estimation, engineers price and send it in minutes.
Every steel estimate begins with hours of manual interpretation.
Tonnexis turns it into minutes.
A fabricator drops in a fabrication drawing (a PDF, including scanned and hand-annotated sheets), an Excel schedule or a BOQ. Audren, the engineering-vision engine behind Tonnexis, reads every page, identifies each member and matches it against a profile library covering major international steel standards (AISC, EN, BS/IS, AS/NZS). Every weight is calculated from verified dimensions, so every figure is auditable and traceable to its source. An engineer signs off before anything is final. The result is a verified weight takeoff in about fifteen minutes instead of two-plus hours. Estimation is the wedge: it builds trust where every job begins. Quotation, ERP and procurement are how Tonnexis becomes the operating system for structural steel fabrication.
Audren is the engineering-vision engine behind Tonnexis. It identifies structural members, interprets drawing callouts and connects every extracted result to visible evidence for engineer verification.
Every hour lost to a manual takeoff is an hour not spent pricing the next job. At fifteen minutes instead of two-plus hours, the same estimating team can turn around more bids in the same week, without adding headcount.
A miscounted profile or a missed fastener run can turn a profitable bid into a loss. Every weight is calculated from verified dimensions and checked against a comprehensive standards library, with every line traceable back to the drawing.
Upload a fabrication or shop drawing as a PDF, including scanned sheets, an Excel schedule or a BOQ. Tonnexis goes to work the moment the file lands.
Audren reads every page and identifies each structural member and profile, including scanned and marked-up sheets.
Every member is matched against a comprehensive profile library covering major international steel standards (AISC, EN, BS/IS, AS/NZS), however it is labelled on the drawing.
Engineers check, edit and approve. Uncertain lines are flagged, never buried, and the takeoff stays locked until every flag is cleared.
A bid-ready verified weight takeoff is returned in minutes, auditable to the kilogram, traceable back to the source drawing, and ready to export as a bid-ready Excel.
Every capability exists for one reason: to put a defensible, engineer-verified number in front of you in minutes, without surrendering the rigour an estimator demands. Clean CAD output, a scanned print, or a page marked up by hand: Tonnexis reads it the same way.
Uncertain members are surfaced for review, never buried, so engineer effort goes exactly where it matters.
Every action and override is logged with engineer and timestamp. Complete reproducibility, on demand.
Export stays locked until every flagged line is approved. No unverified estimate reaches a client.
UB, UC, PFC, RHS, SHS, CHS, angles and plate, matched by designation, dimensions and grade across major international steel standards (AISC, EN, BS/IS, AS/NZS).
Material grade is read straight from the drawing and carried through to weight without re-keying.
Weights are calculated from verified dimensions and engineer-checked, accurate down to the kilogram.
An approved weight takeoff with every line traceable back to the source drawing. The foundation the quote is built on.
Bolts and fasteners are where a manual takeoff quietly loses accuracy: a few missed on a busy drawing, and the number shifts. Tonnexis detects every fastener call-out on the drawing and counts it alongside the member takeoff, so nothing is left to a manual tally.
Every fabricator already runs a workflow: drawings come in, get taken off by hand, priced in Excel, quoted to the client, then pushed into an ERP for procurement and production. Tonnexis asks you to change none of it. Today it sits on top as the intelligence layer at the takeoff step. The goal is to connect every step, end to end, fully automated.
Tonnexis enters where every job begins: the takeoff. From there it expands outward into the full fabrication workflow, fitting inside the process you already run, as the intelligence layer, not a rip-and-replace system.
Tonnexis is live in four fabricator pilots across the UAE, Qatar and Saudi Arabia, running on real fabrication drawings. Every correction an engineer makes sharpens the next takeoff.
Direct feedback from the engineers running real jobs through Tonnexis.
"I didn't believe the first result, so I ran the same job by hand to check it. When my count came out different, I was sure the software had gotten it wrong. I opened the review page ready to prove it, and instead I traced every line back to the drawing and found my own count was the one that was off. Tonnexis had it right."
"Missing a handful of bolts on a dense drawing is an easy way to throw the whole number off, and it happens all the time when you're counting by hand. What got me wasn't the takeoff itself, it was how reliably Tonnexis caught every fastener call-out on the page. Honestly, it's one of the most immediately useful things the platform does."
Encrypted in transit and at rest, never sold, and never used to train AI, with a full audit trail on every action.
Every drawing is encrypted over the wire and stored on encrypted infrastructure, scoped to your organization only.
Your drawings are never sold, shared, or used to train outside AI models. Tonnexis learns from your team's corrections and verified takeoffs to get more accurate for your shop with every job. Private to your organization, always.
Keep what you need; delete a project or job anytime. Removed data is purged from storage after a short recovery window.
Every change logged with timestamp and engineer, complete traceability for compliance and client disputes.
Join the fabricators putting engineer-verified structural steel takeoffs in front of clients in minutes. Invitations are now open.
Questions? Reach us at info@tonnexis.com
Steel takeoff software turns structural drawings into a measured bill of materials: every member listed by section, length, quantity and grade, with total tonnage. Tonnexis does it automatically. It reads fabrication drawings, Excel schedules and BOQs, then returns a complete, engineer-verified weight takeoff in about fifteen minutes. That work traditionally consumes most of an estimator's day.
Estimation is live now, in pilots: drawing in, engineer-verified weight takeoff out. It's the wedge, the step that builds trust where every job begins. Quotation (material pricing, waste and stock optimisation, a client-ready quote) is the next build. ERP integration has been requested by a pilot, and a supplier marketplace is exploratory. The destination is a single operating system for structural steel fabrication, from drawing to procurement.
Upload a fabrication or shop drawing as a PDF, including scanned and marked-up sheets, an Excel schedule or a BOQ. Audren reads every page and identifies each structural steel member by section, length, quantity and grade. It matches every line against a comprehensive library covering major international steel standards (AISC, EN, BS/IS, AS/NZS), however it is labelled, then calculates the weight and routes it to an engineer to review and approve.
Tonnexis accepts standard structural steel PDFs, including scanned drawings, alongside Excel schedules and BOQs. The output today is an engineer-verified weight takeoff you can export, with every line traceable to the source drawing. Full client-ready quotation, with pricing, waste analysis and cost summary, is the next phase on the roadmap.
Accuracy is enforced, not assumed. Extraction runs at 90–95% accuracy, measured across thousands of real fabrication drawings. Every weight is then computed to a consistent, auditable engineering standard. Any uncertain line is flagged for engineer review, and the takeoff stays locked until those flags are resolved. The result is the speed of automation with a human sign-off on every output.
Tonnexis is built for structural steel fabricators and estimators who price work directly from fabrication drawings. It is not a general construction tool adapted to steel. Every stage maps to how a takeoff is genuinely produced: extract, match, review and calculate, with quotation and procurement built on top as the platform grows.
No. Tonnexis removes the repetitive part of the job, reading drawings and calculating weights, so an estimator's time goes to judgement calls instead of manual counting. Every takeoff is reviewed and signed off by an engineer before it's considered final; the platform never publishes a number on its own.
Yes. Re-run a revised drawing and Tonnexis re-extracts and re-matches it against the same standards library, so a Rev B or Rev C sheet is treated as its own verified takeoff, not a manual patch to the last one.
A spreadsheet leaves the work to you: read every drawing, look up each profile, convert units, calculate by hand and hope nothing is missed. Tonnexis automates extraction and matches members against a cross-standard profile library, computes weights to an auditable engineering standard, and records every action and override against an engineer. Open the job months later and the full basis of the takeoff is still intact and traceable to the source drawing.
Audren is the engineering-vision engine built by the Tonnexis team, not a separate product. It identifies structural members, interprets drawing callouts and connects every extracted result to visible evidence for engineer verification. It's the intelligence running underneath every Tonnexis takeoff.
Tonnexis is in early access now, with invitations open. Fabricators across the UAE, Qatar and Saudi Arabia are already running live jobs on the platform. Join the waitlist with your company name and work email to secure first access when we open to your team.