Strong Connectors:
When subjected to a direct vertical force each wedge of the coupler will resist a force of 600 kg. However,
when
the
load is
applied on a horizontal tube connected to two vertical tubes (see test certificate), "a
maximum load of
7500 lb
will make
the couplers start to slip gradually". This means each coupler will
withhold 1700 kg.
Unaffected by vibration:
This is proven by erecting a scaffold on a vibrating table and placing a further vibrator inside a tube and
noting
the lack
of
effect on the wedges.
Safe and permanent:
The spring effect inherent in double wedge design permits wedging further along than is required thus
securing
safe
and
permanent connection.
Simple and indestructible:
The coupler is manufactured out of 6mm steel plate and it can therefore withstand very tough site conditions.
The wedges
cannot fall off. They remain a permanent part of the coupler. In fact, workers who use ZAIDAN
couplers
refuse to use other
couplers.
And most important:
In addition to the in-house tests, the coupler was tested in the McGill University laboratory as the certificate
below shows.
The coupler has withstood more than 30 years of onsite testing.
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