1. Greenhouse Structures
Greenhouse Management

2. Detached Greenhouses
These “stand alone” greenhouses come in 3 basic types:
Even-span greenhouses
Uneven-span greenhouses
Quonset greenhouses

3. Even-span Greenhouses
Examples of even-span greenhouses.

4. Even-span Greenhouses
Usually clear-span.
Roofs equal in width and pitch angle.
Two basic types:
American or high profile.
Dutch (Venlo) or low profile.

5. American or high profile even-span greenhouses
One large roof per greenhouse.
Overlapping panes.
Greater possibility of air leakage where panes overlap.

6. Dutch or low profile even-span greenhouses
Two small roofs per greenhouse.
Roof panes extend from eave to ridge.
No overlapping panes.

7. Uneven-span Greenhouses
One roof wider than the other.
Different pitch angles.
Used on hillsides.
Not popular.
Wider roof faces south for maximum solar gain.

8. Quonset Greenhouses
Examples of Quonset style greenhouses.

9. Quonset Greenhouses Framework consists of curved bars or tubes.
Clear span.
Can be used for growing.
Often covered with white, polyethylene film and used to over-winter nursery stock.

10. Attached Greenhouses
These “connected” greenhouses also come in 3 basic types:
Lean-to
Ridge and Furrow
Barrel Vault

11. Lean-to Greenhouses Attached to buildings or other greenhouses.
Usually face south.

12. Ridge and Furrow Greenhouses
Consist of several to many even-span structures placed one after another forming a range of greenhouses.
Gutter connected.
American or Dutch (Venlo).

13. Barrel Vault Greenhouses
Several quonset type greenhouses connected together forming a range.
Gutter connected.

14. Barrel Vault Greenhouses
Barrel vault greenhouse with ridge vent.

15. The End