Hello,
I'm in the process of breaking up the basement floor in the boiler room. Where the oil boiler was previously located adjacent to the chimney. It was about 5-10 cm higher concrete floor than the rest of the floor slab. It turned out that it was not only higher but also went deeper than the rest of the slab.
Question 1: Could this part have any stabilizing/load-bearing function for the chimney?
Question 2: Is the wall between the boiler room and the laundry room load-bearing? Built of bricks with reinforcement at the bottom. (The wall with the radiator in the pictures)