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HIGH WIND VELOCITIES
The northern coastlines of Australia are frequently
battered by high winds and cyclones during the mid to
late summer season and the most vulnerable
part of any
structure is the roof.
The suction forces created on the downwind side of the
roof rise and fall as the wind gusts and then lulls
and this places fatigue stresses on the roof connection.
If insufficient retention of the roof exists, fatigue
failures occur and the roof will begin to separate.
Once the roof is gone there is little chance the rest
of the building will survive.
The greatest influences on the retention of any roof
are effective reinforcing plates under the heads of
the roofing screws.
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