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Agricultural Greenhouses: Methodology and Construction

11.02.2014
Regis Eder Neu

Stage 3 – Beginning the construction of the greenhouse base

Stage 3 comprises the construction of the greenhouse base by using concrete, and blocks, or other materials like bricks or stones (Photos 21 and 22). Begin by laying the concrete blocks or bricks at the ends of the foundation trench along the demarcated boundaries of the construction site (Photo 23) and leveling the blocks (Photo 24) on the four extremities (Photo 25 and 26). Vertical straightness of the concrete blocks must be checked (Photo 27 and 28) and the base should be constructed according to site demarcation (Photos 29 and 30). The greenhouse base should be built at a height of 40 cm from the site level (Photo 31), leaving previously excavated pit free for placing the columns (Photo 32). Recommended measures for preparing the mortar are six 18-liter cans of sand plus 1 bag of cement (50 kilograms).

Materials used in this stage: try square, folding ruler, level, trowel, plumb line

Photo 21 Laying concrete blocks for greenhouse foundation
Photo 22 Laying concrete blocks for greenhouse foundation
Photo 23 Checking for right plumbing of greenhouse foundation blocks
Photo 24 Checking for correct block leveling
Photo 25 Building the four ends of the greenhouse
Photo 26 Building the four ends of the greenhouse
Photo 27 Checking for concrete blocks alignment
Photo 28 Checking for concrete blocks alignment
Photo 29 Building greenhouse foundation to site alignment
Photo 30 Building greenhouse foundation to site alignment
Photo 31 Free span for placing column
Photo 32 View of foundation with holes 1.87 meter apart
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About the organisation

CIDADES SEM FOME (CITIES WITHOUT HUNGER) is a non-governmental organization (NGO) which has set up sustainable agrarian projects in urban and rural areas based on organic farming. The aim is to help and teach people to manage their own business and become financially independent. Community Gardens, School Gardens and Agricultural Greenhouses have been developed on unused and neglected public and private areas within social focal points to provide jobs and improve the diets of adults and children. In 2009 the Small Family Farms Project, the organizations fourth project, has been set up in Rio Grande do Sul, to train farmers in multiple cropping as an alternative to monoculture and help them starting new businesses in organic farming.

CITIES WITHOUT HUNGER was founded in 2004 in São Paulo by Hans Dieter Temp, who has a degree in Business Administration, and is a Technician for Agriculture and Environmental Policies. In 2013 Hans Dieter Temp was selected and awarded with the title Social Entrepreneur “Changemaker” by Ashoka. CITIES WITHOUT HUNGER has received numerous national and international awards, such as the Milton Santos Award in 2014, created to honor entities and people who have contributed with the city of São Paulo. In 2012 CITIES WITHOUT HUNGER was selected by Caixa Econômica Federal for its commitment to the realization of the UN-Millennium Goals. The organization was also awarded with the Dubai International Award for Best Practices 2010 (UN-HABITAT).

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Cover Photo: Timour Chafik/studiomonaco. Translation (English & Portuguese): Katarzyna Fayterna.