The characteristics and structure of Beilei film

The 'Bailey piece' is also known as a Bailey frame, Bailey beam, or truss. The Bailey frame is a steel frame that forms a certain unit and can be spliced and assembled into many components and equipment. The length and width of the Bailey frame are generally 3M × 1.5m, and it has been greatly developed in China.

Characteristics of Beilei films:

It has the advantages of simple structure, convenient transportation, fast installation, high load-bearing capacity, good interchangeability, strong adaptability, and excellent comprehensive performance. We can provide satisfactory technical support and installation services for users. Adopting modular and intelligent design concepts, it has good interchangeability and connection performance. It can be long or short, wide or narrow, with good installation speed and economy, and can greatly improve work efficiency during use, bringing more favorable conditions for the growth of enterprise profits.

Bailey plate structure:

The Bailey piece is welded from upper and lower chord members, upright members, and diagonal members. The ends of the upper and lower chords are equipped with male and female joints, and there are pin holes for connecting the rod frame on the joints. The Berry piece string is composed of two No. 10 channel steels (back-to-back). There are multiple circular steel plates welded to the lower chord. There are bolt holes on both the upper and lower chords for connecting with reinforced chords and double-layer trusses. There are four bolt holes on the upper chord for connecting the support frame, of which two bolt holes are used to connect two or more rows of trusses on the same section. The two holes at both ends are used for cross node connection. When multiple rows of berets are used as beams or columns, the joints between the upper and lower berets must be reinforced with support frames.

There are four crossbeam base plates on the lower chord, and there are tenons above the base plate to fix the position of the crossbeam on the plane. There are also two elliptical holes on the web plate of the channel steel at the end of the lower chord, which are used to connect the wind resistant tension rod. The upright pole of the Bailey board is made of 8 # I-beam, and there is a square hole on the side of the upright pole near the lower chord, which is used to fix the beam with a beam clamp. The material of the Bailey sheet is 16Mn, and the weight of each sheet frame is 270Kg.

In high temperature, low humidity, and high wind speed weather, it is necessary to cover and sprinkle water for maintenance as soon as possible, and appropriately postpone the maintenance time. To avoid temperature cracks caused by internal bonding of concrete, it is generally recommended to control the temperature difference between the concrete profile and the outside or inside to be less than 25 ℃. The usual control method is to slowly raise and lower the temperature of the heated and solidified components, so that the temperature does not exceed 10 ℃/h, and it is hoped that the cover plate and demolding are slow to avoid excessive temperature stress; For large volume structures, insulation and curing should be carried out when the temperature difference between concrete and the outside is large. When the director removes the template, the temperature difference should be controlled within 25 ℃.