For large space, high-rise places and office buildings, the effect of increasing the effective area of use is obvious. According to the use requirements such as stress, span, special structural performance, etc.). The selection of suitable steel interlayer is mainly based on observation and practice.

Steel frame paving: these methods are low cost, light weight, short construction period, but poor sound insulation, plate deformation time is long, noise when walking, fire prevention and insect prevention, mildew prevention effect is poor. Suitable for small span interlayer due to large force influence,

In the steel frame laying pressure steel plate: these schemes are safe and reliable, bearing capacity, no vibration, sound insulation effect is good, but the cost of slab is high, the construction cycle is a little longer. Suitable for large-span residential buildings, office buildings, factories and other large-span buildings. Based on this, the most common method of steel structure sandwich is established.

Light steel keel structure: this scheme is safe and environmentally friendly, light weight, high strength, not easy to deform, fast construction speed, short construction cycle, but also can be as high as the steel beam flange, maximize the effective use of space. Suitable for office building, villa, residential and so on.