► 名詞屋上  [おくじょう]    
meaning:  roof  rank: 2☆ 
建物の屋上に
ヘリパッドが
在る ⇨ There is a helipad on the rooftop of the building
More examples:- ビルの屋上で花火を観覧した ⇨ We watched fireworks from the top of the building
 - 建物の屋上にはエレベーターで昇降する ⇨ You go up to and come down from the top of the building with an elevator