Install the plastic spacer used between longitudinal and transverse bars bars that are all steel reinforcement slab track in the middle on the upper floor and the ground floor steel reinforcement.
Install the plastic spacer between the longitudinal bars and transverse bars on the middle track slab reinforcement steel both upstairs and downstairs reinforcement steel.
Install plastic spacer used between longitudinal bars and transverse bars at the middle track slab both reinforcement steel. Reinforcement steel upstairs and downstairs.