The uploaded image contains a structural engineering problem regarding the calculation of reinforcement for floor systems. Here's a breakdown of the text and questions:

Summary: The problem focuses on three types of floor systems:

1. Slab with supporting beams - Split into 9 panels, each panel measures 6.5 x 4.5 m. It includes dead loads, live loads, material properties (f'c = 30 MPa and fy = 400 MPa), and specific beam dimensions.
2. Flat slab system - Details about panels, column sizes, slab dimensions, and loads are provided.
3. Mushroom slab system - Includes information on panel sizes, column dimensions, loads, and material properties.

Questions:

1. Calculate the reinforcement requirements using the direct design method.
2. Illustrate the reinforcement details for the slab.
   • Provide drawings for:
     • Portal along East-West direction (center).
     • Portal along North-South direction (center).
     • Portal along East-West direction (edge).
     • Portal along North-South direction (edge).

Would you like me to:

1. Begin solving the reinforcement calculations for one of the floor systems?
2. Extract and provide step-by-step instructions for the direct design method?
3. Assist in drafting the illustrations or calculations for the portals?

Let me know how you'd like to proceed!