1. Floor-bearing plate
Also known as steel bearing plate, building compression steel plate, using galvanized steel plate by roll cold-forming, its cross-section into V-shaped, U-shaped, trapezoidal or similar to these shapes of waveform, mainly used as permanent formwork, but also can be selected for other purposes.
In the use stage floor bearing plate as the concrete floor slab of the tensile steel, but also to improve the stiffness of the floor slab, saving the amount of steel and concrete.
The surface embossing of the pressed plate makes the maximum bonding force between the floor bearing plate and concrete, so that the two form a whole, with stiffening ribs, so that the floor bearing plate system has high bearing capacity.
It can give full play to the advantages of good tensile strength of steel and compressive strength of concrete, and has good seismic performance and construction performance according to the position and characteristics of each component. This structure is now widely used in domestic and foreign multi-rise buildings.
Floor slab and ordinary reinforced concrete floor slab comparison
Floor bearing slabs can be used as permanent formwork for cast-in-place concrete, eliminating the process of installing and removing formwork during construction.
floor bearing slabs can be used as a construction platform after installation, and at the same time do not affect the work of the next floor construction plane because they do not have to use temporary supports.
the floor bearing plate can be used as the bottom reinforcement of the floor slab, reducing the workload of installing the slab reinforcement.
According to the different interface shapes of the pressed plate steel, up to 30% of the amount of concrete used in the floor slab can be reduced, reducing the self-weight of the floor slab and can correspondingly reduce the size of the beam, column and foundation, improving the overall performance of the structure.
Also known as steel beam, is the cross-section of the I-beam long steel. Its specifications to the waist height (h) * leg width (b) * waist thickness (d) of the number of millimeters, such as "work 160 * 88 * 6", that is, the waist height of 160 mm, leg width of 88 mm, waist thickness of 6 mm I steel. I-beam is divided into ordinary I-beam, light I-beam and H-beam.
The flange of ordinary I-beam and light I-beam is gradually thinned from the root to the edge at an angle. Because of their relatively high and narrow cross-sectional dimensions, the difference in moment of inertia between the two main axes of the cross-section is large, so they are generally used only for members subjected to bending in the plane of the web or to form them into lattice load bearing members. For axial compression members or in the perpendicular to the web plane and bending members are not used, which is its application range has a great limitation.
I-beam is widely used in various building structures, bridges, vehicles, brackets, machinery, etc.
3. C section steel
All are cold-formed by hot rolled plate processing, automatically processed by C-beam forming machine. Thin wall and light weight, excellent cross-sectional performance, high strength, compared with the traditional channel steel, the same strength can save 30% of the material.
C-beam purlins are divided into five specifications of 80, 100, 120, 140 and 160 according to different heights, and the length can be determined according to the engineering design, but considering the conditions of transportation and installation, the full length generally does not exceed 12 meters.
C section steel is widely used in purlins and wall beams of steel structure buildings, and can also be combined into light weight roof frames, brackets and other building components by itself. In addition, it can also be used for columns, beams and arms in mechanical light manufacturing.
H section steel is divided into wide flange steel (HW), medium flange H section steel (HM), narrow flange H section steel (HN), thin wall H section steel (HT), H section steel (HU).
H-beam is a new type of economic construction steel. H-beam has an economical and reasonable cross-sectional shape, good mechanical properties, more uniform extension at all points on the cross-section when rolled, low internal stress, and the advantages of large cross-sectional modulus, light weight and metal saving compared with ordinary I-beam, which can reduce the building structure by 30-40%; and because its legs are parallel on the inside and outside, and the ends of the legs are right angles, assembling and combining into members can save welding and riveting Workload up to 25%. Commonly used in large buildings with large load-bearing capacity and good cross-sectional stability, such as supports and foundation piles.