Can we make changes to our design after the project proposal we will send on December 15 ? For example, increasing or decreasing the number of floors or minor changes in floor plans.

You can generally make changes to your design, even your structural design, after the project proposal, except regarding damping devices. Damping devices must be approved by us based on your damping proposal submitted by the damping proposal deadline (see Section 7 of the official rules). The damping device, if approved, has to be exactly as […]

I wonder if it’s possible to consider a foundation type for our building in project proposal. If it’s possible, are there any restrictions about foundation consideration?

In the proposal, you should definitely mention the type of foundation you’re considering and how the seismicity and soil conditions impact the foundation and design considerations. There are no restrictions for the type of foundation considered in the proposal. However, note, isolated foundations are not allowed for the physical model.