Airplane Maintenance Workshop
CSM nv
Hamonterweg 103
3930 Hamont-Achel
Belgium
Tel.: +32 11 64 07 51
Fax: +32 11 64 87 95
Email:
Contact:
M. Ronny Loos
Email:
In 1965,
C. Schuurmans started with a small
construction
workshop in Achel, Belgium,
near the Dutch border. 40 years later, the
company has become one of the
most
important steel
manufacturers in Belgium
with establishments in Achel and Hamont.
CSM has its own engineering, production,
and assembly department which enables us
to finish different types of projects entirely in
own management. The workshops have a
total surface of approximately 25,000
m²,
with a hoist capacity up to 100 ton. CSM
realizes a yearly turnover of approximately
20 Million Euros.
Thanks to its 150 employees, CSM processes
10.000 tons of steel on a yearly basis.
Besides the Benelux, CSM is also active in
Germany, France and The United Kingdom.
The product range of CSM is very diverse.
Not only architectonic constructions of
rolled tubes with smooth welding and steel
connections are possible, also larger indus-
trial projects, such as boiler rooms and pipe-
racks or canals and ducts, are being manu-
factured to the great satisfaction of the cus-
tomers.
CSM also has several references in bridge-
construction and offshore projects.
CSM is certified by ISO9001,
VCA**, and its
welders are being inspected by
means of
different standards. By constantly pursuing
quality, by permanently trying to realise pos-
tulated deadlines, and by putting security as
primary objective, CSM strives for and is enti-
tled to the title of trustworthy supplier.
This project is part of the extension of the
airport activities at Toulouse (Fr). It concerns
a maintenance workshop for different types
of airplanes. In order to be capable of stor-
ing large aircrafts, huge column-free dimen-
sions were required for this project.
This hall consists of 2
main spans of 95
metres and a depth of 59
metres. At the
front site huge
wheeled door panels are
provided to achieve the best possible acces-
sibility for the airplanes. In order to improve
the working conditions at the ground floor,
sufficient sunlight has to enter the hall and
for this reason the roof is provided
with
large “shed-roofs”. Furthermore, to improve
the architectonical elegancy, the roofs have
been curved.
As this project will be a maintenance work-
shop, a considerable number of cranes is
integrated in the roof structure as
well as
other technical equipment.
The structure was built as follows
• Curved purlins supported by roof trusses
• Roof trusses are supported by primary
trusses
• The primary trusses are supported on
columns at the back site and at the front
site a huge spaced truss is provided. The
bottom chord of these trusses are also
equipped with crane way girders.
• The huge spaced truss (depth 8
m /
width 8 m) spans 2 x 95 m and is build up
of circular hollow sections. These trusses
have been assembled and
welded at
ground level and afterwards lifted and
erected as one big unit with a length of
95 m.
• A stable structure is created after adding
bracings at the roof and the walls.
Given the complex interaction between the
different
building components and
on
explicit request of the client, the "complete"
structure has been
modelled in a "3D-
frame”-model. The final
model has up to
3910 nodes and 8690 bars.
During erection, each major truss of 95 m is
simply supported on 2 columns. Later on,
the top chords of these trusses are welded
on site as to create a continues truss of 190
m. This simply supported situation has been
modelled using the option “absence” for
this particular load case.
On customers’ demand, a “differential” set-
tlement of the column bases was taken into
account. The wind loads have been deter-
mined taking into account the different
positions of the
wheeled door panels. All
load cases were combined according to the
combination rules
described in
CM66
(French
standard),
which
resulted in
approximately 60.000 load combinations.
Verifying and optimising all bars for all
60.000 combinations is a very time-consum-
ing job. This problem was resolved by stor-
ing only “the envelope internal forces”. This
action resulted in a “workable” amount of
results,
which empowered us to recalculate
and optimise the project
within a reason-
able time period.
While
creating
calculation
notes
we
encountered another problem. For this proj-
ect it is quite easy to create a vast amount of
paper output
with input data and results.
Although this would have been the easiest
for us to do,
we decided to hand over a
demo-version of ESA-Prima Win to the con-
trolling parties as well as a project file which
included the calculated results. By conse-
quence, the input data and the results were
much more synoptic to them.
Project characteristics
• 2100 ton
• 26000 m²
• Chantier Air France
• 31700 Blagnac-Toulouse
148
Company
Project
Airplane Maintenance Workshop
SCIA User Contest 2005 / Steel constructions
4
Categorie
