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4.4 Construction of the roof covering.
The roof structure consists of pre-formed profiled steel plate, a thermal insulation
wrapped in PE foil, and a roof sealing made out of prefabricated profiled aluminium
bands.
The profiled steel plates are always galvanised and pre-lacquered, after being
perforated. The radius of curvature of the arched profiled steel plates is 10.00 m,
measured from their axis. The height, thickness, and section of the steel plates
as well as all the accessories, ensure the stability of the construction and keep
the maximum covering bend smaller than 1/300, measured axis to axis on the
supporting points.