Each grow tunnel is a seperate and self sustained unit with its own dedicated irrigation and nutrient feeding system. This dramatically reduces the risk of crop losses due to plant diseases caused by shared irrigation water and farm workers entering the grow tunnel too frequently as is the case with wide span grow tunnels.
Alaska free standing grow tunnels allow the farmer to grow more than one variety of vegetables on the same farm to quickly respond to changing market demands. It also allows the farmer to initially install only ten grown tunnels and then more as capital becomes available. This greatly reduces the risk of financial failure of the grow tunnel farm.
Item 1.0
Grow tunnel mild steel double arch frame structure components hot dip galvanized. Uniquely designed to bolt together on site to construct 36 metres long by 6 metres wide by 4 metres high grow tunnel. Steel structure bolted to concrete footings. No welding is required in site and each piece can be man handled.
Item 2.0
200 Micron UV stabilizer plastic thermal sheeting with fasteners to cover the greenhouse structure. Our plastic sheeting attachment method allows for keeping the plastic neat and tight so that the risk of wind damage is reduced and the labour cost to replace the plastic is also reduced.
Item 2.1 Optional
Shade cloth to cover the greenhouse roof. The colour and percentage of shading will be specified when the location of the greenhouses and the vegetables that will be grown is known. The shade cloth will protect the plastic cover, which will increase the effective life of the plastic as well.
Item 3.0
Temperature controlled wet wall evaporative cooler fully installed with water sump, pump, gutters and plumbing which prevents overheating especially when vegetables are produced.
Item 3.0 Optional
Space heaters inside the greenhouse with sock type ducting fully installed with thermostatic control system. Either coal firer, electric or gas fired.
Item 4.0
Dedicated irrigation and nutrient feeding system with water tanks, pumps, timers and irrigation lines for each greenhouse. The nutrients are mixed manually and added to the water in the irrigation tanks.
Item 5.0
Transport of components, materials and workers inside a 100km radius from Johannesburg is included in the price when ten or more greenhouses are ordered.
Item 6.0
Installation and commissioning cast concrete footings, erect greenhouse structure, fit plastic sheeting (fit shade cloth), install irrigation and nutrient feeding system, install wet wall coolers (and space heaters), connect the greenhouse systems to water and electric power and commission greenhouse.
Price Excludes
Site leveling and compacting, connection of water supply to water tanks, connection of electricity to main circuit board, construction of brick grow boxes and plant grow medium for grow boxes if soil on farm is not suitable for the crops to be grown.
For Export Purposes
A minimum of 10 Alaska climate controlled Greenhouses plus a EurepGap and HACCAP certified pack house is required for an export lettuce greenhouse farm to be economically viable. The farm must be located within two hours drive by road from Johannesburg International Airport.
Delivery Time
Installation and commissioning of Greenhouses can be completed in twelve weeks from the day we receive a written order and deposit, depending on present work load. A bank guarantee for the balance due on completion of installation must also be provided before work can commence.
PLEASE NOTE
One hectare of level arable land and 6000 litres per hour of good quality irrigation water is required for 24 hours per day.
Average surrounding air humidity not to exceed 70%.
All affords are made to supply a modern functional practical and effecient plant, however Alaska Greenhouses (Pty) Ltd can not be held responsible for the management and successful running of the greenhouse plant after handover.
Alaska Greenhouses can assist in the marketing of organic grown vegetables as well as in the training of staff is so required.
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