Two types of roller systems are possible:
. With roller guides or rails, which may
be fixed to the ground or recessed. They must be of structural
aluminium, with aluminium or stainless steel wheels and sealed
ZZ or 2RS roller bearings. Other auxiliary components must
be in stainless steel.
. On wheels (without rails) . In this case
the metal components may be aluminium or stainless steel.
This system is suitable only for small enclosures.
Each system has its advantages and disadvantages. The system
of guides means that the enclosure is more securely fixed,
even in structures that must withstand strong winds and not
permit sideways movements. With wheels, the inconvenience
of rails on the ground is avoided. The choice of one or the
other depends simply on the purchaser's preferences.
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