What is the front desk area of the hotel?

The picture of the hotel service desk is taken from Page 163 of Architectural Design Data Set 4 published by China Building Industry Press (below).

Structural beams are generally divided into main beams and secondary beams.

Those arranged along the transverse direction of the building are called beams, and those arranged along the longitudinal direction of the building are called longitudinal beams.

Usually the short direction is beam and the long direction is longitudinal beam.