Found this info on and old football forum. It gives some indication about capacity & no of rows.
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Old Trafford total capacity: 76,212

(capacity numbers of each stand are not exact figures)

North Stand: 25,500 = 102 rows of seats
Lower: 4,250 = 17 rows
Upper: 8,000 = 32 rows
2nd tier: 8,250 = 34 rows
3rd tier: 5,000 = 19 rows

East Stand: 11,500 = 89 rows
East Stand lower: 1,500 = 17 rows (disabled section)
East Stand upper: 4,000 = 32 rows
East 2nd Tier: 6000 = 40 rows

West Stand: 12,000 = 89 rows
West Stand lower: 2,000 = 17 rows
West Stand upper: 4,000 = 32 rows
West 2nd Tier: 6000 = 40 rows

South Stand: 11,500 = 48 rows
Lower: 2,500 = 11 rows
Upper: 8,500 = 37 rows

Lower corners: 1,500 = 48 rows x 4

Upper North East Quadrant: 4,000 = 33 rows (maximum)

Upper North West Quadrant: 4,000 = 33 rows (maximum)

Executive boxes: 1,000
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How can it be when there are only 17 rows in the lower tier?

no way i was going to sit in the west stand after last year.

everyone absolutely bladderred - our own fans fighting amongst themselves.

i said i wouldnt go again, but have caved in and gone for north stand

Same. The Mrs said that to me last night 'Thought you weren't going again'. I sat there and wondered why I'd bought tickets.

2 previous years i was in the lower north stand on about the 25 yeard line and it was fine in there

last year couldnt get them and sat in West. NEVER AGAIN!

would rather fork out and enjoy the game without worrying about protecting the kids from drunken @rseoles.

That's in the toilet