In modern architecture, the utilization rate of floor bearing plate is higher and higher. Including steel structure of the building between the different floors, many also use floor slabs to do. I believe that many customers consult: how thick is the cement thickness on the board? Today, let's have a good talk about this problem.

As a permanent form of building, its load coefficient is the premise of design and construction. Therefore, in most of the measurement and construction experience, the thickness of cement laying is usually about 120mm, which is consistent with the thickness of the floor of traditional steel concrete structure. Of course, we do not rule out special requirements in some special projects. For example, the thickness of the floor is thicker; A multi-storey building of two or three storeys; Need to place a large number of equipment plant, these load on the floor is larger. There are also some production workshops, when the machine will generate vibration load. Based on these special needs, cement thickness is usually set at 150mm, and sometimes even up to 200mm.

In addition, the selection of floor slab thickness is also affected by many factors. For example: in the case of fire resistance limit of 1.5 hours, the thickness of the floor is also affected.

First of all, the floor bearing plate in the steel structure building should reach the fire resistance limit of 1.5 hours, and three categories of opening plate, shrinkage plate and closed plate can be selected. In the specification, the cement laid should be 80mm higher than the top of the rib of the opening plate, and the floor should be equipped with the bottom reinforcement of the plate.

Secondly, another factor is fire retardant coating. The bottom of the open floor plate needs to brush fire retardant coating, coating thickness ≥15, so that the cement as long as the structural requirements, 50mm higher than the top of the rib can be.