"At the circle ‘rows’
Can it be column?"

Yes, in fact there is a theorem that says an orthogonal matrix with orthonormal rows also has orthonormal columns.

A side note - I noticed you wrote "dot=0" above inner product. Inner product is a more general case of the dot product. Vectors might be orthogonal with respect to one inner product (like the Euclidean inner product, which is dot product), but not orthogonal with respect to a different inner product. Make sure to check which inner product you are using.