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In order to get the strength needed to carry roof loads, flat sheets of steel are run through a roll-forming machine. To form the ribs, the steel is stretched and bent. As a result, especially when using full hard steel, there is a strong likelihood that this stretching may result in hairline cracks in the paint and zinc. These cracks may in turn result in future red rust.
At Morton, our commercial-quality Hi-Rib steel is more flexible and includes a heavier zinc coating and more flexible KYNAR 500® paint, which resists cracking during the roll-forming operation. It’s just one more reason why, when you choose Morton, you’ll have a building that looks better and lasts longer.
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