Industrial Steel Structures · Single-Storey
Plant Steel Structure — A Floor Where Production Decides Everything
A large single-storey plant done right is one uninterrupted working surface: clear spans to 36 m, tall bays for overhead cranes, bays that extend as your lines grow. We engineer the steel around your production flow — not the other way round.
36 m Clear Span no columns on the working floor | Crane 5–50 t runway designed into the frame | Bay-by-Bay add bays without shutdown | +30–40% Faster erected vs concrete |

See Your Building Before It's Built — Our In-House 3D Designer
This is a real output from the parametric design tool our engineers run in-house. You send dimensions, it generates the 3D model, a render of your actual building and a budget breakdown with an item-by-item BOQ — in minutes, not engineering weeks.
A render of YOUR building not a stock photo — your span, your doors, your roof | Budget + BOQ included steel tonnage itemized section by section | Change a number, watch it update longer? taller? the model re-runs instantly |
Want one for your project? Send length × width × eave height and your city — a designer output like the screenshot above comes back within 24 hours, free.
The Layout DNA of a Well-Planned Plant
Three dimensions decide whether a plant works for 20 years. Each is set by your process, then frozen into the steel.
| Dimension | Typical range | What actually decides it |
|---|
| Span | 18 – 36 m | Production line length & crane reach — one bay wide enough for the line plus both-side truck access |
| Bay spacing | 6 / 7.5 / 9 m | Equipment footprint vs. steel tonnage — every metre saved here repeats down the whole building |
| Eave height | 6 – 14 m | Hook height + crane top + roof clearance + 0.5 m — the number everyone guesses and everyone pays for |
What Moves Your Price — No Secrets
Two identically sized plants can differ by a third in cost. Here is exactly what we price on, so you can choose where to spend.
| Price lever | Effect on your budget |
|---|
| 1 · Cranes yes or no | Runway beams, heavier columns & bracing — the single biggest step between a shed and a working plant |
| 2 · Eave height | Every extra metre adds wind area and steel — design to hook height, not to wish height |
| 3 · Site wind & snow | Coastal typhoon or mountain snow loads change member sizes everywhere — send the city, we pull the codes |
| 4 · Insulation & façade | Single sheet vs. 50–100 mm rockwool panel vs. curtain wall — a comfort and fire-rating decision, not decoration |
| 5 · Future bays | Planning one connection detail now saves a full frame re-design when you expand |
Specification — Built Around the Numbers Above
| Item | Plant Steel Structure |
|---|
| Structural system | Tapered portal frames, welded H-sections; gable or mono-slope roof |
| Steel grade | Q355B / A572 Gr.50 / S355JR (EN 10025) |
| Crane integration | 5–50 t single/double girder; runway deflection ≤ span/800 |
| Envelope | 0.4–0.8 mm color steel or 50–100 mm rockwool/PU sandwich panel; ridge ventilators & skylights |
| Doors | Rolling-up, sliding & personnel doors at process-driven positions |
| Loads & codes | Wind 35–45 m/s (ASCE 7-22 / EN 1991, typhoon-grade sites higher) · roof live 0.5 kN/m² · AISC 360 / Eurocode 3 |
| Coating & bolts | Sa 2½ blast + PU topcoat ≥125 µm or HDG; A325/A490 HS bolts; service life 50+ years |
| Lead time | 25–60 days · T/T 30% deposit, 70% before shipment |
| Skip the back-and-forth — send these 4 numbers: |
| 1) length × width × eave height (or "I have machines:" + list) · 2) crane: yes/no + tonnage · 3) wall & roof: sheet or insulated panel · 4) site city — and a portal-frame model with an honest bill of steel returns within 48 h. |