Australian Steel Estimators Have Been Left Out
If you're a structural steel fabricator in Australia or New Zealand, you've probably noticed something about the AI takeoff tools on the market: they don't understand your drawings.
Most steel takeoff software — manual or AI-powered — was built for American fabricators using AISC notation. W12X26, HSS6X6X1/4, C10X15.3. Hand those tools an Australian drawing full of 310UB40.4, 250UC89.5, and 150PFC callouts, and they return nothing useful. (For context on why most tools are AISC-only, we wrote a separate piece on that.)
That's changed. Steelflo now supports AS/NZS steel sections natively, with automatic detection, metric output, and weight lookups from Australian section databases.
How AS/NZS Notation Differs from AISC
The most visible difference: Australian and New Zealand sections put the depth first, followed by the section type and mass per metre.
| AS/NZS | AISC Equivalent | Description | |---|---|---| | 310UB40.4 | W12X27 | Universal beam, 310mm deep, 40.4 kg/m | | 250UC89.5 | W10X60 | Universal column, 250mm deep, 89.5 kg/m | | 150PFC | C6X8.2 | Parallel flange channel, 150mm deep | | 200×200×6.0SHS | HSS8X8X1/4 | Square hollow section | | 150×90×5.0RHS | HSS6X3.5X3/16 | Rectangular hollow section | | 75×75×6EA | L3X3X1/4 | Equal angle | | 150×90×8UA | L6X3.5X5/16 | Unequal angle | | 100CHS | — | Circular hollow section |
The number-first format is distinctive enough that it's visually obvious to an Australian estimator — but completely opaque to software that's only been trained on AISC patterns.
What Steelflo Detects on AS/NZS Drawings
Steelflo's detection pipeline includes 11 regex patterns specifically for AS/NZS notation:
- Universal beams: 310UB40.4, 460UB67.1, 530UB82.0
- Universal columns: 250UC89.5, 200UC46.2, 310UC96.8
- Parallel flange channels: 150PFC, 200PFC, 300PFC
- Square hollow sections: 200×200×6.0SHS, 100×100×4.0SHS
- Rectangular hollow sections: 150×90×5.0RHS, 250×150×6.0RHS
- Circular hollow sections: 100CHS, 168.3CHS
- Equal and unequal angles: 75×75×6EA, 150×90×8UA
Each detection includes the bounding box location on the drawing, the page number, detection confidence, and the source method (text extraction or OCR fallback for raster drawings).
Automatic Standard Detection
You don't need to tell Steelflo you're uploading an Australian drawing. The pipeline scans every page, counts pattern matches against each supported standard (AISC, EN, BS/IS, AS/NZS), and routes to the best match.
AS/NZS's number-first format — 310UB, 250UC — is distinctive enough that it rarely gets confused with other standards. The detection results include which standard was identified and a confidence score.
Metric Output, Australian Weight Data
When Steelflo detects an AS/NZS drawing, all output uses metric units:
- Section weights in kilograms per metre (from an Australian section database with 55+ profiles)
- Dimensions in millimetres
- BOM quantities in metric
No manual conversion needed. The numbers match what you'd look up in the OneSteel or Liberty Steel section catalogues.
Validated on Real Australian Drawings
We tested AS/NZS detection against actual fabrication drawings, not synthetic test files:
- WW Austral project: 119 detections across a multi-page structural set — UB, UC, PFC, and hollow sections all identified correctly
- BMW Penrith project: 237 detections on a larger drawing package — including mixed section types and varying notation styles
These results were cross-checked against known member lists from each project.
Why This Matters for Australian Fabricators
The Australian structural steel market has specific characteristics that make automated takeoff valuable:
Compressed bid cycles. Australian fabricators describe the same pressure US shops feel — timelines tightening, more bids needed to win work, less time per estimate. For tips on speeding up your bidding process, we wrote a separate guide. A tool that returns quantities in minutes instead of hours changes how many bids you can pursue.
Estimator shortage. Finding experienced steel estimators in Australia is hard. Augmenting your existing team with AI means you don't need to hire another estimator to increase bid volume — you make your current team faster.
Mixed-standard projects. Australian projects sometimes reference both AS/NZS sections and British standards (UC, UB in BS notation). Steelflo's pipeline handles this: BS/IS and AS/NZS patterns can both fire on the same drawing set. European sections like HEA, HEB, and IPE are also supported if they appear on your drawings.
Export-oriented fabrication. Australian fabricators increasingly bid on international projects that use different standards. A tool that handles AS/NZS, BS/IS, and EN means your estimating capability isn't limited to domestic work.
The Current Alternative
Without AI takeoff software that supports AS/NZS, Australian fabricators are stuck with two options:
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Fully manual takeoff. Open the PDF in Bluebeam or a similar markup tool, scroll through every page, visually identify every steel callout, manually enter it into a spreadsheet, and look up section weights in a reference table. Works, but slow.
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US-focused AI tools that miss everything. Upload the same drawing to an AISC-only tool and get zero useful detections, because the tool doesn't recognize 310UB40.4 as a steel member.
Steelflo is the third option: purpose-built AI detection that actually understands the sections on your drawings.
What AS/NZS Standards Does Steelflo Support?
Steelflo detects universal beams (UB), universal columns (UC), parallel flange channels (PFC), square hollow sections (SHS), rectangular hollow sections (RHS), circular hollow sections (CHS), and equal/unequal angles (EA/UA) in AS/NZS notation.
Does Steelflo Work with Metric Units?
Yes. All AS/NZS takeoff output uses metric — weights in kilograms per metre, dimensions in millimetres. No manual conversion required.
Do I Need to Configure Steelflo for Australian Drawings?
No. Upload your PDF and the pipeline automatically detects that it uses AS/NZS notation, then routes to the correct pattern library and weight database.
How Accurate Is Steelflo on AS/NZS Drawings?
We validated against real Australian fabrication drawings: 119 detections on WW Austral and 237 on BMW Penrith, both cross-checked against known member lists. The best way to evaluate accuracy for your work is to run your own drawing through the free trial.
Can Steelflo Handle Drawings That Mix AS/NZS and BS Sections?
Yes. Australian drawings sometimes include British standard sections (UC, UB in BS notation alongside AS/NZS callouts). Steelflo's detection pipeline handles mixed-standard drawings.
Try It on an Australian Drawing
Upload one of your structural PDFs and see the results for yourself. Steelflo's free tier gives you one AI takeoff — enough to verify that your sections are detected and weighted correctly.
Start free at steelfloai.com — no demo call, no credit card.