When it comes to constructing greenhouses, the process initiates within a workshop, where various components such as arcs, pillars, leads, bars, canals, corners, and reinforcements are manufactured. This applies to chapel, tunnel, asymmetric, tropical, and gothic greenhouse designs. However, for blackbone greenhouse structures or Almeria models, construction takes place directly at the project location.

Outlined below is a step-by-step guide to assembling polytunnel greenhouse models (including multispan, gothic, and asymmetrical-tropical designs):

Ground Preparation and Leveling The initial phase of greenhouse construction involves preparing and leveling the ground where the structure will be situated. This encompasses reshaping the land to the correct elevation, taking into account water drainage and slopes to optimize working conditions inside the greenhouse.

Clearing and Grading: The process commences with clearing and ensuring the suitability of the land for subsequent earthmoving activities. Excavation and Embankments: If the ground is uneven, it might be necessary to create cuts or embankments to adjust the terrain, ensuring it conforms to the greenhouse design specifications. Leveling: The final step in earthwork entails leveling the ground to match the design requirements.

Layout and Foundation Preparation During this phase, the greenhouse layout is marked on the ground or foundation plan, indicating the areas where excavation for the foundation is necessary. Subsequently, excavation work is carried out.

Material Reception and Preliminary Assembly Materials are delivered to the construction site for later use. These materials are organized in a designated construction area adjacent to the greenhouse location. The following tasks are executed:

Anti-corrosion treatment is applied to surfaces in contact with column bases using tar. Installation of capitals (top elements of the columns) takes place. Pre-assembly of components such as arches, roof bars, pendolones, and window arms is performed to facilitate later placement. This might involve assembling arches on the ground prior to installation, or adding elements like crop bars and pendolones after the arches are in position. C Profiles (used to secure plastic film) are placed within the gutters.

Greenhouse Assembly PILLARS The installation process starts with placing the pillars and their foundations. These cylindrical concrete footings are created on-site. Pillar installation occurs after the concrete footings have been poured. To prevent corrosion, the base of the pillars is treated with tar. Alignment and stability of the pillars are verified before allowing the concrete to set.

CAPITALS AND GUTTERS Once the pillars are set, capitals (top parts of pillars) are added, followed by the assembly of gutters.

ARCHES After the gutters are in place, the trusses are assembled. This involves erecting and positioning the arches for the roof, which were previously preassembled at the construction site.

PROFILES AND ATTACHMENTS Mesh grids are mounted on the roof and sides, securing them to the side pillars and structural reinforcements of the greenhouse.

COVERING Upon completing the structural assembly, the roofing material is installed. The final touches involve adding auxiliary features like overhead window opening systems, greenhouse doors, and other necessary components.