Just adding to what the others have written.

There is a fair bit of information in some of British builders' and
engineering journals of last century. I remember reading something (1880s)
about  difficulties caused by the different corrugations used by different
manufacturers (and a list of some of the brands with measurements). The
best known trades encyclopaedias of last century discuss the invention of
galvanizing but have relatively little on corrugated iron sheeting.

Lysaght produced a handbook, 'Lysaght's Referee' every few years - for
example, the twelth edition was in 1922 and the seventeenth in 1939. They
contain a lot of technical information like illustrations of the
thicknesses of the sheets (Birmingham Gauge), illustrations of sheets,
roofing screws and even the various trade marks. Their most famous brand
was of course the 'Orb' brand.

A nice feature of several types of corrugated iron sheeting (Lysaght
included)  is that they are stamped with the date of the year - generally
the last two digits.

Robert V J P Varman


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