Going through the top 7 rollformers in Australia - the corrugated profile is unique and yet common to all - they have the same characteristics of height, number of ribs & valleys, overall width and cover.
Most also come from the same make of rollforming machine, and sometimes from many different machines but with all the same outcome! You can buy a sheet of corrugated iron from the 7 different major rollforming companies or 90 plus independents and you'll get the same profile for your roof, chicken shed or dog kennel! The biggest difference is the finish - be it Galvanised, Colorbond or ZincAlum - all seem to fit easily together! Ask any roofing contractor!
But you go to the product data sheets of the 7 major rollformers and - MISTAKE - big one - so basic that they don't know the difference between cover and overall width! all sheets should be the same width - BUT one is different - which one?
Corrugated Iron, by Adam Mornement and Simon Halloway March 31, 2009 Australia is very familiar with corrugated iron. It almost assumes a national identity. A Very good read.
WHO HAS MADE A MISTAKE?
Not a good outcome in regard to technical detail!
Here are 7 different images of corrugated from their websites technical areas below: - what is the problem?
The companies are Lysaght, Stramit, Stratco, Steeline, Fielders, Revolution and Metroll! All of these sites are available on the Links for Rollformers above - but see if you can guess who's made the MISTAKE and why????
Just fix it quickly please!
UPDATE - Brochure on the website has been removed and no doubt will be corrected!