This large single span greenhouse uses a hot galvanized steel framework with a 275 g/m2 zinc coating, giving 10 to 15 years of anti rust service. The cover can be polycarbonate sheet or white black and white polyethylene film, depending on your light and insulation needs. Spans are recommended at 8 m, 9.6 m and 11.8 m or customised, with shoulder heights of 3 m to 5 m and bays set by local wind speed, usually 4 m. Because there are no internal columns, the full width is open growing space, which suits vegetables, nursery stock and small mechanised work.
A single span house gives growers something a multi span block cannot: one wide, column free space from wall to wall. This large single span greenhouse uses a hot galvanized steel framework with a 275 g/m2 zinc coating, and it can be covered in polycarbonate sheet or white black and white polyethylene film. The clear span suits vegetable farms that want open growing space and easy movement of trolleys or light tractors.
The framework is fabricated from hot galvanized steel, coated inside and out with 275 g/m2 of zinc. That coating protects cut ends and bolt holes, which are the first places to rust on untreated steel. Because the design is single span, no internal columns interrupt the growing area, so cultivation, irrigation layout and crop walking are simpler. Spans are recommended at 8 m, 9.6 m and 11.8 m or customised to the site, with shoulder heights between 3 m and 5 m. Bays are set by local wind speed and typically run 4 m. The cover is chosen to suit the crop: polycarbonate sheet for better insulation, or polyethylene film for economy. Growers planning protected vegetable programmes often follow extension guidance such as that published by Michigan State University horticulture, and trade reporting on FreshPlaza.
The greenhouse arrives as a pre fabricated kit with numbered frame sections, cover and fittings. Assembly is bolted, so no field welding is needed and a trained crew can raise a standard span in a predictable time. Maintenance is mostly about the cover: inspect film or sheet for damage before each season, keep fixings tight, and check that gutters and drainage stay clear. Galvanized steel needs no repainting under normal use.
Large single span houses suit vegetable farms that want open, column free growing space, and they work well for tomatoes, peppers, leafy crops and soft fruit. Nursery operations use the same span for propagation and hardening off, and cut flower growers value the even light. Because the cover costs far less than glass, a large block can be built economically. Compare our full multi span greenhouse range and the multi span PE film greenhouse, or review our tunnel greenhouse options for lower cost blocks.
A single span has no internal columns, so the whole width is usable growing space and machinery can move freely. Multi span blocks cover more ground per unit of wall, which can reduce heating loss on very large sites.
Polycarbonate sheet offers better insulation and holds heat on cold nights, which suits early crops. Polyethylene film costs less and is easier to replace, so it suits seasonal vegetable production where budget matters most.
With a 275 g/m2 zinc coating and normal use, the frame resists rust for 10 to 15 years. Touching up any scratches in the coating will extend that further.
Yes. We recommend 8 m, 9.6 m and 11.8 m as standard, but spans can be built to your site plan. Send your required width, length and shoulder height and we will confirm the layout.
Send your span, length, shoulder height and local wind and snow loads, plus your target crop. We reply with a layout drawing and a full quotation covering frame, cover, ventilation and fittings.
