This is the 16572nd most frequent Turkish word.
yerleştirileceği
"Yerleştirileceği" means "the place where something will be placed or installed."
Here, 'yerleştirileceği' is used in a passive future relative clause, indicating the time when the placing action will occur towards the books on the shelves.
Kitaplar raflara yerleştirileceği zaman dikkatli olunmalıdır.
When the books are to be placed on the shelves, care should be taken.
In this sentence, 'yerleştirileceği' represents a passive future clause about the items that are destined to be arranged in the drawers.
Çekmecelerin içine nelerin yerleştirileceği planlanıyor.
What will be placed inside the drawers is being planned.
Here, 'yerleştirileceği' functions as a passive future relative clause concerning the arrangement process of the furniture in the rooms.