CROP 08 · STRUCTURE NOTES
Herbs are a small structure with a tight climate.
Herb and microgreen production runs in low, narrow houses or converted buildings. The steel is light, the air volume is small, and climate swings are fast — so vent response and insulation matter more than span.
Small volume means fast change: a herb house can overheat in minutes. That argues for generous vent area relative to floor, and for avoiding heavy structures that block the vent path.
| Parameter | Value | Note |
|---|---|---|
| Span | 4.2–6.2 m | narrow, high vent ratio |
| Eaves | 2.0–3.0 m | bench + tray + lamp |
| Vent | side + roof | fast actuation |
| Cover | film or PC | insulation vs light |
| Benches | single or multi-tier | load per m² |
Multi-tier benches multiply the load per m² of floor. If the plan includes racks, tell us at quotation stage: the frame may need a different post line, and the floor loading becomes a civil question.
Lamps add load
Lighting rigs hang from the structure. A 20 kg/m² lamp load is not unusual; it has to be on the drawing before the purlin spacing is fixed.
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