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Agricultural Greenhouses: Methodology and Construction

11.02.2014
Regis Eder Neu

Stage 10 – Installation of the 2-inch bent PVC-pipe arches

During Stage 10 we will install and attach the arches onto the greenhouse wooden structure, as well as the pieces of lumber that will reinforce the whole roof after the 2-inch PVC arches are assembled. Next, the arch is positioned on the wooden structure (Photo 139). Three people are needed to lift the upper wooden structure with the arch bent upwards (Photo 140). Photo 141 shows the initial position of the bent PVC pipes attached to the 4-inch PVC columns (Photo 142).

We recommend using a 2-inch round metal clamp (Photo 143) to reinforce the connection between the bent pipes and the 4-inch PVC column. After laying all the arches on the greenhouse wooden structure, install the upper (Photo 144) and lower (Photo 145) pieces of lumber, so that the entire wooden roof structure is reinforced. Tied with galvanized wire (Photo 146), the 2-inch PVC arch is centralized on the main beam (Photo 147). The structure of the agricultural greenhouse with alternative materials is finished (Photo 148).

Photo 139 View of arch placed over wooden structure
Photo 140 Placing 2-inch PVC arch over wooden structure
Photo 141 Coupling of arch with column
Photo 142 Coupling of 2-inch PVC arch with 4-inch column
Photo 143 Steel clamp to reinforce arch coupling
Photo 144 Placing the upper beam on which 2-inch PVC arch will rest
Photo 145 Placing the lower beam of the greenhouse wooden roof structure
Photo 146 Tying the 2-inch PVC arch to the greenhouse wooden structure with wire
Photo 147 View of arch placed over wooden structure
Photo 148 View of greenhouse roof structure
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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.