6 supported on metal framing channels above the trusses. Part of the COLORBOND ® roof profiles were to be sprung curved to a 120 metre radius, however this presented a challenge, as the manufacturer’s product information nominated a maximum 60 metre radius. BHP Building Products overcame this restriction by using a lower tensile G300 profile Klip-Lok 406, Colorbond XRW, and demonstrated the required radius on a test rig. Speedier construction wi

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