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 Modern
materials and manufacturing  Modern-day
quality synthetic materials - in the form of either semi-finished
or finished building materials - have convincing structural properties.
Textile membranes arc modern composites, most of which consist
of highly-stable glass or polyester fibers coated with synthetic
PVC or PTFE materials.
 The specific stability of such membranes
is greater than that of steel reinforcements and girders in everyday
use. Absolute requirements for membranes are high tensile strength
and tear resistance with simultaneous flexibility and lightness
In addition, the membranes are coated with a high-quality
surface sealant.
A high warranty on the part of the manufacturer is guaranteed,
in order to document the long life and great robustness of structures
for which they are used.
  Also other materials,
such as aramides, for the manufacture of synthetic ropes which
can stand excessive strain, are now being used more and more
in primary structures and are replacing heavy steel cables in
many areas.
Construction of the objects by the textile engineering industry
requires the greatest precision in manufacturing and assembling
the large elements into an enormous membrane roof which sometimes
covers more than 40,000 square meters.
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