Palram greenhouse solutions

Fit every frame, match every structure

A key to successful greenhouse production is a well-planned greenhouse structure and a reliable glazing system.

Among the traditional options for greenhouse covers, polycarbonate sheet offers versatility and efficiency, since it can be cold bent to retrofit greenhouse frames that were designed for PE films, and can be tailor made to retrofit glasshouses that experienced hail and/or debris damage.

Both corrugated and multiwall polycarbonate glazing systems can suit any gutter connected (ridge and furrow)  or free standing greenhouse frame.             

Gothic Arch

  • Efficient design, eliminates the need for structural trusses.
  • Common configurations in subtropical climates.
  • Gables consist of two arches that meet at the ridge.
  • Optional Configurations: With/without roof windows.
  • Common span between gutters: 9.6 meters to 11.2 meters (30 feet to 40 feet).

Compatibility with polycarbonate sheet

  • One polycarbonate sheet spans from ridge to gutter, with purlins spanned according to required load bearing.
  • Window and ridge cap elements are available.
Gothic Arch

Saw-tooth gable

  • Composed of two inclines or arches of different heights and lengths with a fixed open vent between.
  • Common span between gutters: 6 meters to 12 meters (20 feet to 40 feet).
  • Common in desert regions and tropical climates, where open ventilation is required.
  • Typically designed for PE film but can easily be retrofitted using corrugated or multiwall polycarbonate sheets.

Compatibility with polycarbonate sheet

  • One for each slope, polycarbonate sheet, ridge to gutter.
Saw-tooth gable

Even span / A-frame gable

  • A very simple design of two slopes of equal pitch and width.
  • A very strong and firm structure. Suitable for heavy wind / snow loads.
  • Common span between gutters: 9.6 meters to 11.2 meters (30 feet to 40 feet).
  • Most common configuration for cold and temperate climates.

Compatibility with polycarbonate sheet

  • A common glasshouse structure which can easily be retrofitted with corrugated polycarbonate sheets without any structural modifications.
  • One polycarbonate sheet spans from ridge to gutter, with purlins spanned according to required load bearing.
  • Windows and ridge cap elements are available.
Even span / A-frame gable

Quonset arch

  • A basic design of a bent arch built with steel pipe or square steel tubing
  • Usually spans are 6-10 meters (20-33 feet), but wider arches are common.
  • Allows excellent solar energy penetration

Both corrugated and multiwall polycarbonate sheets with attention to few important details:

  • The sheets are bent within the allowed bending radius. To access our bending radium calculator click here
  • A uniform arch all around
  • Ridge purlin
  • One sheet gutter-to-gutter installation is possible, as long as guidelines are maintained to prevent residual stress.
Quonset arch

Wide-span

  • Two moderate, long inclines that create a wide open structure without internal support columns.
    Advantage: Large, column free, open area. Suitable for garden centers , sprouting plants, storage areas, work areas with conveyors or large volume equipment

Compatibility with polycarbonate sheet

  • Each incline is made up of a either one sheet ridge-to-gutter, or number of overlapping sheets, depending on required length.
Wide-span

Tabular Summary of Greenhouse Frame Types

Saw tooth gableGothic archesEven span /A-frame gableQuonset gableWide span
Light constructionLight and economic frameRobust construction for extreme wind and snow loadsLight constructionRobust construction for extreme wind and snow loads
Light loadsMedium to high loadsSuitable for extreme climatesLight loads. Not suitable for high snow loadsSuitable for extreme snow and wind loads
Fixed roof ventilation Various optional window configurationsVarious window configurationsVarious window configurationsVarious window configurations
Simple and easy installationSimple and easySimple and easy. Designated system accessories can adapt the covering to carry extreme loads.Either one sheet gutter-to-gutter installation, or any other configuration is possible Simple and easy. Must follow recommended guidelines. . Designated system accessories can suit the cover to carry extreme loads.
Suitable for tropical and sub-tropical climatesSuitable for tropical, subtropical and temperate climatesSuitable for any climateSuitable for subtropical climateSuitable for any climate
Simple retrofit from PE to corrugated polycarbonateSimple retrofit from PE to corrugated polycarbonateHeavy dutyArch radius should be no less than 4 m (13.1 ft.)Creates a large working space free of obstructions. Large air volume: requires more energy to heat/cool

ONE SOURCE FOR ENGINEERING GUIDANCE & TECHNICAL SUPPORT

The Palram team provides services to support an array of agricultural & horticultural segments.  We accompany you from the specification of the most suitable solution, through the planning through to adaptation and successful implementation.

ONE SOURCE FOR ENGINEERING GUIDANCE & TECHNICAL SUPPORT