Greenhouse Structures

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