1.As per the attachments Capture 1 and Capture 2, there’s enough space to install the stairs that don’t interfere with the screw conveyors. Being on the walkway, to raise the upper floors there’s a dedicated ladder. On the opposite side (where you would move the stairs, there’s an emergency ladder. We recommend to follow our design and don’t move the stairs.2. Under the PK-731isn’t necessary any platform. It’s possible to reach the duct with a small stair and/or a scaffolding.3. What mentioned by you is the cleaning system of the bags (attached for reference drawing D713E001 rev.0 for PK-720). How to install it is shown in the manual sent you (please refer to the letter C3544/034-lt on 31/03/2020). For your better reference, I’ve sent you separately with TRS n. 165 the full package of drawings for the installation of the cleaning system for each baghouse.