A temporary roof was set up at the construction site.
I picked up the luggage at the airport cargo terminal.
ターミナル is a loanword for terminal, used broadly for transport hubs. 上屋 can refer to the physical terminal building, especially in cargo or airport contexts.
Standard kanji spelling.
Alternate kanji spelling; less common than 上屋.
Compound of 上 (うわ, 'upper') + 屋 (や, 'roof' or 'building'). The exact historical derivation is uncertain, but it likely refers to a structure that provides overhead cover.