A brief search turned up this definition http://members.edventures.com/terms/t/trestle/definition.html which supports Helen's observation.

However, I also found this http://www.dictionary.com/cgi-bin/dict.pl?term=Trestle


In NZ at least we have trestle tables and trestle scaffolds, and probably others which haven't crossed my bows. So I guess you can say it is a generic term for any support which is essentially triangular in design.



The idiot also known as Capfka ...