Go to
http://www.corusrail.com/en/reference/downloads/brochures/
Scroll to the bottom of the page and download "Rail Products Technical Handbook" then scroll through to page13
HTH
Duncan
@home
🙂
Duncan Anderson
"Humour is one man shouting gibberish in the face of authority, and proving by fabricated insanity that nothing could be as mad as what passes for ordinary living." {Terence 'Spike' Milligan KBE (16 Apr 1918 – 27 Feb 2002)}