This tunnel greenhouse pairs an aluminium frame with a hot galvanized steel arch structure, and the frame carries a 275 g/m2 zinc coating for long anti rust service. Arch pipes come in 25 mm to 60 mm diameters, and widths run from 6 m to 10 m with lengths of 20 m to 100 m or customised to your site. Shoulder height is 1.3 m to 2 m and roof height is 3.3 m to 3.5 m. The cover is PEP film in 150 or 200 micron, and wind loads of 60 to 130 km/h and snow loads of 0.25 to 0.5 kN/m2 are supported. Ventilation, heating, cooling, shading and drip irrigation can be added.
Vegetable growers who want a wide growing space at a low cost per square metre usually start with a tunnel. This tunnel greenhouse combines an aluminium frame with a hot galvanized steel arch, so the structure stays light while the galvanized steel does the load bearing work. The PEP film cover keeps the build economical, and the arch profile sheds rain and snow cleanly.
The arch is formed from hot galvanized steel pipe with a 275 g/m2 zinc coating, which protects the inside and outside of every section as well as cut ends and bolt holes. Arch pipe diameters run from 25 mm to 60 mm depending on span and local loads. Widths cover 6 m, 7 m, 8 m, 9 m and 10 m, with lengths from 20 m to 100 m or customised to the site. Shoulder heights of 1.3 m to 2 m suit both hand work and small trolleys, while roof heights of 3.3 m to 3.5 m give good air volume. The PEP film cover is supplied at 150 or 200 micron. 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 ships as a pre fabricated kit with labelled frame sections, film and fittings. Assembly is bolted, so no field welding is required, and a trained crew can raise a standard tunnel in a predictable time. Maintenance centres on the film: check for tears and loose fixings before each season, keep tension even so the cover sheds rain properly, and confirm drainage channels stay clear. Galvanized steel needs no repainting under normal use.
These tunnels suit commercial vegetable production, from leafy crops and tomatoes to peppers and soft fruit, and they work well for season extension in temperate climates. Cut flower and nursery operations also use the covered space for propagation. Because the film cover costs far less than glass, large blocks can be built economically. Compare our full tunnel greenhouse range and the multi span PE film greenhouse, or review our galvanized polytunnel greenhouse options for larger blocks.
PEP 150 micron suits most seasonal vegetable tunnels and offers good value. Step up to 200 micron where wind exposure is high or where you want a longer service interval between cover changes.
Yes. Side or top ventilation, heating, cooling, shading and drip or micro irrigation can all be fitted to the same frame. Tell us your climate and crop and we will recommend a configuration.
The design covers wind loads from 60 to 130 km/h and snow loads from 0.25 to 0.5 kN/m2 depending on arch pipe diameter and bay spacing. Send your local design loads and we will confirm the specification.
That depends on your climate and crop. In most temperate regions a tunnel adds several weeks at each end of the season, and with a double layer or thermal screen the gain is larger.
Send your required width, 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, film, ventilation and fittings.
