Design of Steel Structure Greenhouse Frame

The steel structure greenhouses come in various types, which can be classified into arch greenhouses, sawtooth greenhouses, double-slope greenhouses, etc., based on the differences in their roof and skeletal forms. Among them, arch greenhouses are characterized by their simple design and ease of construction; sawtooth greenhouses have great natural ventilation capabilities due to the significant height difference between the ventilation windows on their trusses and their lateral ventilation walls; double-slope greenhouses, due to their gable roof design, can quickly shed rain and snow that accumulate on the roof, reducing snow loads. Additionally, as they are taller and have sloped roofs, they bear higher wind loads.

The structural unit of a greenhouse Steel Frame Buildings is the simplest structural unit that makes up the greenhouse structure, containing all types of components that constitute the greenhouse Building With Steel Structure, and serves as the basic module of the greenhouse structure. The structural units of the Venlo-type greenhouse mainly include main columns, side span columns, trusses (including chord members, web members, and mid supports), gutters, gutter supports (on columns), gutter supports (on trusses), purlins, shading frameworks, etc.

Column Design

The main columns of the greenhouse Steel Frame Building Construction use thin-walled galvanized square steel pipes, with a rectangular cross-section. Depending on the north-south differences and the type of greenhouse construction, they can be classified into models such as 120*120*3.5, 100*100*3.0, and 100*50*2.5. The span ranges from 4 meters to 16 meters, with common openings used being 4 to 8 meters.

Gutter Design

The gutter in a greenhouse mainly serves the purposes of longitudinal connection and drainage within the greenhouse Canadian Steel Buildings. It is also made of galvanized steel sheet, and the dimensions of the gutter cross-section are primarily determined by the span length and the required drainage capacity of the roof. The standard size is 4 meters.

Roof Frame

DesignThe roof frame structure of the greenhouse is composed of arch rods (horizontal) and purlins (vertical), both of which have a rectangular cross-section and are made of thin-walled galvanized square steel pipes. The arch rods serve as load-bearing purlins and also function as the battens for the glass or plastic roof cover, dividing the entire roof into sections. This allows the light-transmitting panels to run directly from the top of the columns to the ridge, reducing the obstruction of light by load-bearing materials.

Truss Design

The trusses of greenhouse structures primarily serve to connect components, increase lateral stiffness, bear longitudinal loads, and transfer these loads to the columns. The trusses are mainly composed of chord members, web members, and bracing. Additionally, there are structural components such as end stiffeners and welded steel plates at the ends. The chord members of this greenhouse structure are made of thin-walled galvanized square steel pipes, while the bracing and chord members share the same material and cross-section shape. The web members are made of L-shaped steel, and the ends of the trusses are connected to the columns through welding and bolting.

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