Corrugated metal roofing is a popular choice for commercial and industrial buildings. Offering incredible strength and durability while being lightweight and easy to install, it’s an attractive piece for any contractor, builder or homeowner.
The roofing/walling shall be 0.42 (or 0.48) mm BMT Stramit® Corrugated Roof and Wall Cladding in continuous lengths with sinusoidal ribs 16mm high, spaced at 76.2mm centres in accordance with AS1445. Sheeting material shall be protected steel sheet to Australian Standard AS1397, with a minimum yield stress of 550MPa (Grade G550) and an AM100/AZ150 coating with an oven-baked paint film of selected colour, or a plain AM125/AZ150 coating.
The sheeting shall be fixed to the purlins/girts in accordance with the manufacturer’s recommendations. Suitable fixing screws in accordance with Australian Standard AS3566, suitable for minimum corrosivity category 3, shall be used at every support with side lap fasteners installed at mid span if required. Sheets shall be laid in such a manner that the approved side lap faces away from the prevailing weather. A minimum of 50mm shall be provided for projection into gutters.
Flashings shall be supplied in compatible materials as specified; minimum cover of flashing shall be 150mm. All sheeting shall be fixed in a workman-like manner, leaving the job clean and weathertight. All debris (nuts, screws, cuttings, filings etc.) shall be cleaned off daily.
NOTE: 0.60mm G300 Corrugated has a 300MPa steel grade.
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