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BULLETINS
& ARTICLES
REDPATH SUPER
LIGHT GREENHOUSE:
OVERVIEW
 The
Super Light greenhouse is the most advanced single skin greenhouse design.
It has been designed for the grower that needs maximum light transmission
for their crop. It takes advantage of the Redpath cosecant curved
rafter1 and Triple-R raised ridge2 features for superior ventilation in
adverse conditions. No greenhouse lets in more light than the Super
Light. The Super Light has the following features:
1. Greater light harvesting through
the use of the curved rafter
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More roof area at right angles to the sun reducing
reflection.
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More roof area to collect light compared to a straight
rafter building, e.g. the Redpath curved rafter gives about a 5% increase
in rafter length over a straight rafter structure.
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Reduced shading of the crop from support structures-
no glazing bars or purlins required to support the roof cladding.
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Greater crop loading capacity (up to 30kg/m2) than
straight rafter greenhouse buildings. This is important with modern
high pole height structures that maximize crop yield per square metre.
2. Greater control of the environment
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Increased air volume above the crop through the use
of the curved rafter.
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Reduced heat loss - structural members are not exposed
to the outside air and IR plastic film is used for heat retention.
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Bigger air buffer zone between crop wire and the greenhouse
ridge providing a more stable growing environment.
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Greater growing zone with up to a 4.4m(14’5”) wire
height attainable
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More ventilation per square metre.
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Greater safe growing zone using the Redpath curved
rafter for condensation drainage.
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Improved ventilation using the Redpath Triple-R raised
ridge allowing wider vent opening in rainy conditions and under high condensation
conditions without condensation ‘run back’.
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Vee Gutters with incorporated aluminium condensation
collection traps are standard for improved condensation control. Extra
condensation control can be achieved by fitting an optional drip tray beneath
the vee gutter.
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Clear span with uncluttered “A” frame that allows
easy installation of IPM or bird screens with minimal restriction of airflow
through the vents.
3. Greater flexibility
Individual vent or multi-vent control options available.
Designed for 10-12 crop rows.
Large accessible gutters.
Cheaper than glass to construct - approximately US$75,000
to US$100,000 cheaper per hectare.
Can be twin skinned for conditions where heat retention
is a priority.
Shade or thermal screen options available.
Pack house can be incorporated into the building by
cladding with steel to provide a secure structural zone (no pre-forming
of the steel required).
Bumble Bee compatible Duratough greenhouse film is
utilized on the design.
1 Cosecant curved rafter -
NZ Design Registration No. 25666, Australian Design Registration No. 123677
2 Triple-R raised ridge – Patent
Pending App. No. 337731
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