Simplify the following text for a Grade 9 native English-speaking person.
Original: Burj Khalifa is highly compartmentalised . Pressurized , air-conditioned refuge floors are located approximately every 35 floors where people can shelter on their long walk down to safety in case of an emergency or fire .
Simplified: Burj Khalifa has pressurized , air-conditioned refuge floors are located approximately every 35 floors in case of an emergency or fire .50 m ( 164 ft ) deep .