Arkansas Greenhouse Management Unit 3: Structures
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| anchor support posts | side posts providing the main structural support for a greenhouse that are spaced at regular intervals
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| cold frame | an outside propagation structure consisting of a wooden or concrete block frame with heat supplied by solar radiation through a transparent covering
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| even span | a basic style of greenhouse in which rafters are equal in length
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| glass | a type of greenhouse covering; allows greatest light transmission; comes in grades; expensive
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| Gothic arch | basic style of greenhouse with a pointed arch; trusses have been eliminated
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| hotbed | an outside propagation structure similar to a cold frame except electric or hot water heat is used
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| polyethylene | a petroleum-based flexible plastic used for many purposes; greenhouses can be covered with this
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| purlins | run the length of the structure and are attached to each truss, adding more structural strength
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| quonset | basic style of greenhouse with curved roof with or without sidewalls
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| ridge and furrow greenhouse | greenhouse whose structure consists of a number of greenhouses connected along the length of the houses; creates a large interior space
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| rigid structured sheet | a type of covering used in greenhouses commonly made of polycarbonate and acrylic; it is rigid and resistant to weathering
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| trusses | composed of rafters, chords, and struts that support the roof
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| uneven spac | basic style of greenhouse in which rafters are of unequal length
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| ventilators | movable units of a greenhouse to allow for natural air flow (vents)
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Created by:
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