Wooden flooring and frame

This is a design engineer assignment for the CD.
It is necessary to calculate and finalize the wooden flooring between the 1st and 2nd floors.
In the attachment, pictures showing the scheme of the frame and overlap.
This model is made in Revit, I give it to work or I can translate it to Autocad 3d or 2d.
Color designation:
- Lilac indicates the positions of the beams necessary for the interior project,
Yellow - mauerlat (around the perimeter) and on the supporting wall dividing the volume in half (it has an opening of 4 mestra), you can clearly see if you twist the model.
- Brown - 1st floor bar racks
- Dark green - racks of timber 2 floors and mezzanine
- Light - green - decoratively sewn timber (for the beauty of the interior)
- Red beams of mezzanine.

Accepted cross section of the timber overlap 150 * 150 mm + without LAG 40 mm plywood and carpet.
Also, to understand the entire frame, there is a visualization of the interior, drawings that can be studied under the agreement.

It is necessary:
1 - to modify the design to ensure structural strength (step beams, cross-section), and the device of the floor (plywood)
2 - Give the nodes for installation (perforated fasteners)
3 - Mauerlat nodes