Steel structure attic production and installation

Steel structure attic production and installation
1. Steel and wood structure
1. Generally, 120mm I-beam steel is used as main beam, 120mm channel steel is used as ring beam, and 50mm×50mm∠steel is used as auxiliary material for construction and production; construction supplies: 12mm, 14mm chemical anchor bolts, 14mm expansion screws, J422GB bridge welding rod; Steel structure production of I-beam: first determine what kind of plate (large core board, laminated timber, pine board, particle board, etc.) to be placed on the attic, such as large core board (size: 1220mm×2440mm): first fix the channel steel ring during production After the beam is drilled by the electric hammer drill, the chemical anchor bolt is implanted, and the channel steel is installed after it is fully solidified. Then according to the special-shaped connection of the steel structure, the upper and lower steel sheets are cut and inserted into the channel steel to measure the size of the main beam. One beam, one measurement, overlap the I-beam main girder, the joints are welded at 360°, the spacing is 610mm from the middle to the middle, and the large core plate is up to 2440mm. The joints are placed on the middle and upper I-beam. ∠steel split size When 610mm×610mm is connected, the incision is also installed according to the heterosexual connection, and the joint position is placed on the ∠steel; after this structure is installed, the joint cannot be seen from the ground up, and the overall steel frame evenly reaches the force; of course, Specific design and construction of specific plates, no matter which type of plate is laid, must be lapped in the steel frame to facilitate the load-bearing and stress of the steel structure;
2. 100mm channel steel, 100mm×100mm square pipe production; the construction process is the same as that of I-beam construction, and the plate must be laid in the square pipe when laying;
3. If the space span of the house is larger than 4000mm, it is necessary to consider the use of 140mm, 160mm, 180mm, and I-beam steel to prevent chattering and sinking deformation after construction. The specific situation should be determined after referring to the house structure;
4. Advantages of this structure: fast construction speed, light weight of the attic, little force on the wall; disadvantages: variability, no sound insulation; use: can be used as storage room, tea room, study room, etc.
2. All steel structure
1. I-beam is used for the flat connection of the main girder, and the angle steel is the auxiliary beam to connect the main girder. The division of the I-beam is also based on the profiled steel plate (also known as the floor tile has different thicknesses of 0, 8mm, 1, 0mm, 1, 2mm) Depending on the size of the I-beam, when lapped, let the I-beam load half of the steel plate or too much I-beam so that the I-beam load-bearing plays a leading role. After the steel frame is lapped, float the profiled steel plate, weld it to the steel frame, and weave the threaded steel grid on it (according to the construction requirements of the concrete structure)
Rebars with diameters of 10mm and 12mm are tied together with special binding wires for reinforcement construction. Finally, the lightweight material (ceramsite) is poured into cement and sand with a mixing ratio. The ratio of cement: sand: ceramsite is 1:2:3.