The blue boxes have to comfort a working climate and good
Since the elevated innercity highway causes a km-wide ground vibration the radio production has a real problem. It is eliminated with a hanging construction in the U-profiles analogue to microphones in studios. A light 3-skin construction blocks normal air sound.
Another point for the light construction is Rio's climate: warm and humid. No mass, no cold bridge, no condensation. The relative small studios are supplied with fresh air with the water conditioning system (located on the opening square).