IBR is a square fluted profile with an effective covering width of 686 mm designed for use as side cladding or roofing material in commercial, industrial and residential buildings. The use name IBR is abbreviated form "Inverted Box Rib" and has become a household name in the South African building industry. The deep broad flute design offers excellent drainage characterised combined with optimum weight versus load/span capabilities. IBR can be factory cranked, curved an

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Note added at 19 mins (2006-05-10 18:45:21 GMT)
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I think we should keep the abreviation in English and then translate the term.

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Note added at 20 mins (2006-05-10 18:46:09 GMT)
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reference
http://www.safintra.co.za/saf686/saf686.htm