What is the practice of concrete floor?

First, there is no backfill, which means that this 700mm is overhead. Moreover, C30 concrete with a thickness of 12 and double-layer bidirectional 10 diameter steel bars are actually not very thick, ranging from 2- 10 tons, which is higher than ordinary floors.

The second type is actually similar to the general road surface. If it is a workshop, there will be equipment on it, and maybe a car will come in to load and unload. You can make this thicker.

3. In the equipment area, driveway area and warehouse area, do as per Scheme 2. In the area with small load (such as staff rest area), backfill and tamp, and lay C30 concrete with 12 thickness and double-layer bidirectional 10 diameter steel bars.