What is a beam-slab between the first floor and the second floor?

The beam and slab between the first floor and the second floor should be called the second floor beam and slab.

beam-slab is the combination of interacting beams and slabs in the floor. Cast-in-place reinforced concrete beam-slab system is the most widely used and applicable floor form at present, and its safety and economy have great influence on buildings. The beam and slab in the integral casting floor are an interactive whole, which is closely related to each other and bears the same force and deformation.

the main raw materials of concrete beam and slab are as follows: Sand and gravel, water, cement, steel and additives.

with the continuous development of China's economy, the scale of construction projects is constantly expanding. As an important part of construction, the application scope of concrete is increasingly extensive. In the process of concrete pouring, due to the influence of many internal and external environmental factors, concrete beams and slabs are prone to cracks in different degrees. Although slight concrete cracks have no great influence on the safety and quality of the project, if there are obvious cracks in the beam and slab, it will bring various quality problems, such as water seepage and collapse, which will cause long-term harm to the function and life of the construction project.

the first floor beam and slab refers to the first floor, and the second floor beam and slab refers to the second floor.

the second floor is the top floor of the first floor, not the bottom floor of the second floor.

the cutting position of the structural plan is different from that of the architectural plan, and the structural plan is cut at the floor slab. Therefore, the second-floor beam and slab in the structural drawing refers to the first-floor roof, and now the second-floor beam and slab on some drawings will be marked as the first-floor roof.

the first floor beam slab is also called the first floor slab, and the basement roof slab if there is a basement. The first floor beam slab refers to the basement beam slab, the second floor beam slab refers to the first floor beam slab, and so on.