The prefabricated floor of a restaurant in my hotel is 5 meters by 5 meters, which has been tiled by 16 people for 18 years. Is it safe for me to continue to tile it?

The bearing capacity of precast slab is 4-6 kg per square meter, so the maximum bearing capacity of 5 square meters is 3 kg.

Prefabricated slab is the floor used in early buildings. It is called precast slab because it is processed in the factory and directly transported to the construction site for installation. Grade of bearing live load: Generally, two grades of boards can be used for residential buildings, that is, the first-class board and the second-class board. The first-class board means that it can bear live load of 1KN/M2, and the second-class board can bear live load of 2KN/M2. Southwest China has stipulated that the minimum floor is a four-level slab, that is, it can bear a live load of 4KN/M2.