Tonnexis turns fabrication drawings into verified weight takeoffs in minutes. AI-extracted and engineer-approved. Estimation is live today; quotation, ERP and procurement are how we get to the full system.
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. Tonnexis' AI model reads every page, identifies each member and matches it against a profile library covering major international steel standards. 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.
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.
Tonnexis' AI model 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, 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 verified weight takeoff is returned, auditable to the kilogram and traceable back to the source drawing.
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.
Uncertain members are surfaced for review, never buried, so engineer effort goes exactly where it matters.
Every weight is calculated to a consistent engineering standard and signed off by an engineer. Reproducible and traceable straight back to the source drawing.
A comprehensive profile library covering major international steel standards. Every member is matched by section, dimensions and grade.
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.
Export the approved weight takeoff with member list, quantities and tonnage. Every line traces back to the source drawing.
Tonnexis enters where every job begins: the takeoff. From there it expands outward into the full fabrication workflow. One system, from drawing to procurement.
UB, UC, PFC, RHS, SHS, CHS, angles and plate, matched by designation, dimensions and grade across major international steel standards.
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.
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.
Join the fabricators putting engineer-verified structural steel takeoffs in front of clients in minutes. Invitations are now open.
Questions? Reach us at tonnexisadmin@gmail.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. Tonnexis' AI model 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, 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.
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.
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.