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001107
2018-03-11

Awning of Filling Station in Douala, Cameroon

The new roofing system for the GULFIN Cameroun oil company's filling station in Douala is a particular structure with eccentric columns and non-symmetric cantilevered 21-foot-long beams.

CASTI GROUP, a Dlubal Software customer based in Cameroon, designed the structure and managed and monitored the construction site.

The engineering team of CASTI GROUP designed the structure according to the Eurocodes in RSTAB and in the STEEL EC3 add-on module.

Structure

The awning covers a surface of 1,399 ft2. The columns are eccentric, connected to a 29.5-foot-long supporting beam. They absorb loads from the transverse beams which support the contour truss. The imbalance produced by the front and back non-symmetric transverse beams is reduced by the varying slopes on each side of the gutter.

The main supporting beam is an HEB 240 cross-section; the columns are HEB 300. Chords from the trusses were designed at first in HEB 120, then improved in HEB 100 with the RF-/STEEL Plasticity add-on module, which allows for the consideration of plastic reserves of a cross-section.

The roof covering is made of translucent polycarbonate panels with a double slope toward the central gutter supported by the main beam.

Both the production and assembly of the roof structure were made by a company specializing in steel construction. The investor opted for this company because of the complex assembly of this awning at a filling station.



Project Specifications

Model data

Number of Nodes 153
Number of Members 276
Number of Load Cases 2
Number of Load Combinations 6
Number of Result Combinations 4
Total Weight 6.582 tons
Dimensions 55.77 x 36.09 x 19.85 feet
Program Version 8.07.03

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