B777-200 reports that a EDDF taxi diagram has a note restricting B777 aircraft of all types on Taxiway N7 which is the only taxiway available after pushback. Ramp Control advises that there are no restrictions and the Captain taxis as directed.

Narrative

I was conducting a line check. Our pushback clearance from Gate A 20 from ramp control was to advise push crew to pull us forward to abeam gate A 24. This confused the tug driver as he had never pulled a flight forward to that position. When pulled to that position it was apparent that we could not taxi using taxiway N8 as we were committed to N7. This confused the crew. FRA east chart; which is that chart most folks use to taxi at FRA due to it's expanded view has a note prohibiting 777's from taxiing on N7 north of taxiway N (our present location). The Captain queried Ramp Control and was told that there were no restrictions for our aircraft on Taxiway N7. As the crew looked for other indications that the B777 could in fact use N7 they came upon the note on FRA airport diagram that stated that 777-300's were prohibited from taxi on N7 north of taxiway N. There are no NOTAM's as to the use of N7 north of taxiway N. It was apparent that there was adequate clearance for our taxi and we did so. There is a NOTAM however that states that max wingtip clearance on N8 (our usual route to the even A gates) is now 61.0 meters; which is 200.08 feet for the metrically challenged. With a wingspan of 199'11'; some poor tired soul some dark foggy morning is going to hurt something. Some clarity on the charts and US conversion in the NOTAMS is in order.