What is the main structure of a Beret film

Bailey frame, also known as Bailey beam or truss. Can be used for highway bridges, assembled gantry cranes, guide beams, bridge erecting machines, hanging baskets, and Bailey truss combination gantry cranes. So what is the main structure of the Beret film?

Bailey 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 beret string consists 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 beret piece is 16Mn, and the weight of each piece frame is 270Kg.

The '321' steel bridge is a prefabricated highway steel bridge, characterized by lightweight components, easy disassembly, and strong adaptability. It can be quickly built with simple tools and manpower. Suitable for 5 types of loads including car level 10, car level 15, car level 20, track level 50, trailer level 80, etc. The clear width of the bridge deck lane is 3.7m, which can be combined into various span simply supported beam bridges within the range of 9m to 63m, and can be used to construct continuous beam bridges.

Berets can be used for highway bridges, assembling gantry cranes, guide beams, bridge erecting machines, hanging baskets, etc. The beret truss combination gantry crane adopts assembled highway steel bridge components to assemble the gantry frame, and its span and column height are adjustable to adapt to different workplaces. Widely used in on-site construction operations of highway, railway, municipal, construction, water conservancy and other construction projects, such as lifting and transportation of prefabricated components in bridge construction prefabrication yards, transportation and loading of main beams next to bridge piers, etc.