Greenhouses that require long spans without reducing light are a

Greenhouses that require long spans without reducing light are a

A positive
greenhouse effect
Greenhouses that require long spans without reducing
light are a technical challenge. In a world traditionally
dominated by steel, BBK Veksthus has solved the
problem with aluminium extrusion technology.
Ravnsborgs Gård just
outside Oslo is a good
example of a greenhouse designed for
commercial horticulturalists. Around
2 million herb plants
are produced annually
in 10,000 square meters
of aluminium-frame
greenhouses.
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BBK Veksthus makes greenhouses where
aluminium extrusions are the main building material. The main products are buildings for garden centers and commercial
greenhouses.
The greenhouses are a technical challenge
to satisfy a series of sometimes conflicting
demands. Long spans require extrusions that
are both very strong and stable.
At the same time, a basic requirement for
an effective greenhouse is that it lets in the
maximum amount of light, which means
using the slimmest extrusions available.
Add the fact that the greenhouses are exposed to high forces from the wind and loads
from snow, as well as having to be well sealed
and effectively allow condensation and rain
water to run off, and you can appreciate how
complicated the equation has become.
Luckily, aluminium’s built-in anticorrosive
properties deal with the demands for durability in what can be an aggressive environment
with chemical fertilizers and damp.
Some 50 extrusions
The BBK construction system uses over 50
types of extrusion, accurately shaped and
designed for optimum strength and stability, ease of handling and assembly, as well
as fastening and connection to systems for
illumination and climate control, fertilising
and so on.
Parts of the system are welded together
by BBK in its own workshops, including
framework constructions of aluminium
extrusions for strengthening the long roof
spans, but for the most part joints use bolts,
screws, riveting or clip connectors.
Turn-key constructions
BBK is virtually alone in building entirely
of aluminium in a world that is still dominated by steel. The company provides turnkey constructions that not only include the
load-bearing framework with walls, roof,
windows and doors, but that are also fully
equipped with systems for climate control,
irrigation, fertilizing, illumination and shade
control and so on.
The greenhouses are produced in modules
and delivered ready to assemble. The bulk of
production is for commercial greenhouses
used as a retail outlet and greenhouses with
special demands for functional and aesthetic
design.
Demands that are completely satisfied by
BBK’s system based on aluminium extrusions
that have a positive greenhouse effect.
Over 50 types of extrusion are used in the BBK construction system, accurately shaped
and designed for optimum strength and stability, ease of handling and assembly.