|The following is based on Fallout Shelter or Fallout Shelter Online and some details might contradict canon.|
On the ground floor on the side of the building you enter, is a trio of raiders.
If you head down the elevator, towards the left are two groups of five raiders. The right side of the building is inaccessible from the ground and bottom floors.
If you head up the elevator, there is a group of five radroaches, a group of three raiders, and the alpha deathclaw, accompanied by three deathclaws. You receive a lunchbox and Mr. Handy box upon their defeat.
On the top floor, there is a group of three mole rats, followed by two separate groups of three raiders. From here, the elevator grants access to the right side of the building. One floor below is a group of three raiders who may drop a Nuka-Cola Quantum. On the bottom floor is one last trio of raiders.