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Corrugated 762

CORRUGATED 762 gives you the versatility of a traditional corrugated roof or wall cladding profile with the strength and light weight of a modern steel building product.

Rollformed from COLORBOND® steel and available in a wide range of colours, CORRUGATED 762 is the cost effective cladding solution for just about any building application. Just picture how it will improve your building project.

INSTALLATION

PRINCIPLE

The sheets of CORRUGATED 762 overlap each other and are fixed progressively along the building in the opposite direction to the prevailing weather. This gives complete weather protection and a fast and efficient method of installing the roof. Each sheet includes an “under” rib and “over” rib to form an anti-capillary drain which prevents water entry at side laps.

PREPARATION

Lift packs of CORRUGATED 762 onto the roof frame so that all sheets are the right way up and with the over edge facing the end of the roof where laying will commence. Prevent roof damage by walking on at least two ribs to distribute the weight over the foot and walk across the roof over the supports. When the roof pitch is less than the 25° or where there are extreme weather conditions, turn the sheet ends up approx. 80° at the high end and down approx. 15° at the gutter or low end. A shifting spanner can be used to do this.

END LAPPING

When two or more sheets are required for full length cover, start laying at the gutter and work up to the ridge and then start the next run. The minimum end laps required are:

Roofs: Pitch up to 15° – 230mm
Pitch over 15° – 150mm

Walls: 100mm

End laps in roofs with a pitch of <5° (1 in 12) must be sealed. End laps must be positioned over a support and the support spacings either side must be that recommended for an end span.

FIXING

RECOMMENDED FASTENERS

Steel Framing (up to 5mm):

1. Crest Fixed – No 12x35 Hex Head Self Drilling Tek with Neo. Washer.
2. Valley Fixed – No 10x16 Hex Head Self Drilling Tek with Neo. Washer.

Timber Framing:

1. Crest Fixed – No 12x50 Hex Head Type 17 Self Drilling Wood Screw with Neo. Washer.
2. Valley Fixed – No 12x25 Hex Head Type 17 Self Drilling Wood Screw with Neo. Washer.

SIDE LAP FASTENERS

These are added to give weatherproofing at the midspans of the sheets for support spacings over 900mm for roofs and 1200mm for walls. Use No 8x12 Hex Head Type 5 Self Drilling Screw with Neo. Washer OR blind rivets.

METHOD OF FIXING

Roofs – Pierce fix through crests only, using 3 Fasteners/sheet OR 5 Fasteners/sheet depending on the location. At the end sheets 5 Fasteners/sheet must be used.

Walls – Pierce fix through crests OR valleys. 3 Fasteners/sheet OR 5 Fasteners/sheet can be used depending on location. At the ends of sheets 5 Fasteners/sheet must be used. If valley fastening is used side lap fasteners must be added beside each main fastener.

PRECAUTIONS

Always use a spreader bar and fabric slings to prevent damage when unloading bundles of sheeting with a crane. When manually handling sheets use clean dry gloves and do not drag sheets over each other. Storage of sheets should be above ground and under cover.

Crest fasteners must not be overtightened but driven in until slight deformation of the rib is observed and the neoprene waster is fully sealed.

Do not locate fasteners less than 25mm from the end of sheets. Do not use punches to form holes for fasteners. Holes must be drilled or self drilling fasteners used.

COVERAGE

CORRUGATED 762 has an effective coverage of 762mm when laps of 1.5 ribs are used.

ROOF PITCH

CORRUGATED 762 is designed so that sheets overlap by a minimum of 1.5 ribs, which prevents the entry of water. The minimum recommended roof pitch is 5°.

NON CYCLONIC