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Metroll Newcastle
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METAL ROOFING & WALL CLADDING - High Wind velocities

 
Download Cyclonic Fasteners PDF   

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.

CYCLONIC SCREWS

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