A term for steel rebar and others that is urgent

1. Stressed ribs: After the calculation of the mechanical structure, the steel bars configured for the stressed parts or components such as bending, shear, compression, torsion, and cherry pull are mainly used to bear the load and meet the structural function.

2. Distributed reinforcement: It is arranged in the cast-in-place component, used to fix the stressed steel bar, resist the bending moment and various uncertain internal forces that are ignored in the calculation, and belong to the structural steel bar.

3. Structural reinforcement: To meet the structural requirements, the steel bars that are not easy to calculate and do not take into account are the structural steel bars.

4. Erection bar: It is mainly the reinforcement configured to fix the stirrup, ensure the spacing and the position of the stress bar in the beam. 5. Negative moment ribs:

The negative deficit type and moment tendon is a steel bar that bears negative bending moment, generally at the upper part of the beam near the support or the upper part of the plate near the support part. Belongs to the stressed steel bar 6, through the length of the steel bar: refers to the length of the section in the marked section, the diameter can be different, can be lapped, welded or other connection forms, to ensure that this part of the steel bar in each part of the component can play its performance, and both ends should be according to the tension anchorage treatment of the steel bar.

Ribbed rebar: A rebar with two longitudinal ribs and transverse ribs evenly spaced along the length of the surface.

Crescent rib reinforcement: the longitudinal section of the transverse rib is crescent-shaped, and the reinforcement that does not intersect with the longitudinal rib.

Longitudinal rib: A uniform continuous rib parallel to the axis of the rebar.

Transverse ribs: Other ribs that are not parallel to the longitudinal ribs.

Nominal diameter of ribbed rebar: The diameter of a circle equal to the nominal cross-sectional area of the rebar.

Relative rib area of ribbed reinforcement: The ratio of the projected area of the transverse rib in the plane perpendicular to the rebar axis to the product of the nominal perimeter of the rebar and the spacing of the transverse ribs.

Reinforcing steel refers to steel for reinforced concrete and prestressed reinforced concrete, which is circular in cross-section, sometimes square with rounded corners. Including light round steel bar (commonly known as wire rod and round bar), ribbed steel bar (commonly known as rebar). The steel bar can withstand the tensile force, increase the mechanical strength, the reinforced concrete is slowly sent to the surface layer to damage the protective layer or expose the steel bar, resulting in the corrosion of the steel bar, and some serious damage will also weaken the structural strength, so that the building is unstable and damaged.

In addition, due to the long-term effect of hydrochemical erosion, Hoga will develop in depth, resulting in a decrease in the strength of concrete and a shortening of the service life of the building. Therefore, timely repair of surface damage of concrete buildings is a necessary measure related to safe operation.

The grade is composed of HRB and the minimum yield point of the grade, and H, R, and B are the first letters of the three words of hotrolled, ribbed and bars, respectively. Hot-rolled ribbed steel bars are divided into three grades: HRB335 (old grade is 20mnsi), HRB400 (old grade is 20mnsiv, 20mnsinb, 20mnti) and HRB500. It is mainly used in construction projects.

Rebar manufacturers in China are mainly distributed in North China and Northeast China, North China such as Shougang, Tangshan Iron and Steel, Xuangang, Chenggang, etc., Northeast China such as Xilin, Beitai, Fugang, etc., these two regions account for more than 50% of the total output of rebar.

Rebar is a ribbed steel bar on the surface, also known as ribbed steel bar, usually with 2 longitudinal ribs and transverse ribs evenly distributed along the length direction. There are three types of transverse ribs: spiral, herringbone, and crescent. It is expressed in millimeters of nominal diameter.

The nominal diameter of the ribbed rebar is equivalent to the nominal diameter of the light round rebar with equal cross-section. The nominal diameter of the rebar is 8-50 mm, and the recommended diameter is mm. Ribbed steel bars are mainly subjected to tensile stresses in concrete.

Ribbed steel bar due to the effect of ribs, and concrete has a greater bonding capacity, thus can better withstand the effect of external force. Ribbed steel bars are widely used in various building structures, especially large, heavy, lightweight, thin-walled and high-rise building structures. Answer Supplement 1, Rebar :

Specification mm2, round bar: specification: 10-42mm mm) Steel clock: Q215, Q, HG CRMNTI, 20Cr, 20CrMo, 35CrMo, 42CrMo, 60Si2Mn, 40Cr

Representation of the mechanical properties grade and size specifications of rebar.

H, R, and B are the first letters of the three words "hotrolled", "ribbed" and "bars", respectively.

The number after HRB indicates the mechanical property level of the material it is made of, and the specific value is the yield strength of the material S (or

For example, HRB335 indicates that it is a rebar with a yield strength of 335MPa.

The following number is its specific size specification, and the front one refers to its nominal diameter, which is measured in millimeters. The latter refers to the length of its single root, and the unit is meters. Such as:

20*9, indicating that its nominal diameter is 20 mm, and the length of a single root is 9 meters.

22*9, indicating that its nominal diameter is 22 mm, and the length of a single root is 9 meters.

There are two commonly used classification methods for rebar holes: one is to classify by geometric shape, according to the cross-sectional shape of the transverse rib and the spacing of the rib for classification or classification, such as the British standard (BS4449), the rebar is divided into.

type, type. This classification mainly reflects the gripping performance of the rebar. The second is to classify (grade) by performance, for example, China's current implementation standard, rebar for (g

The wire rod is medium, and the rebar is divided into 3 grades according to the strength level (yield point tensile strength); Japanese Industrial Standard (JI)

sg3112）

According to the comprehensive performance, the rebar is divided into 5 types; The British Standard (BS4461) also stipulates the performance test of rebar.

Several levels. In addition, rebar can also be classified according to its use, such as ordinary steel bars for reinforced concrete and stressed steel bars.

Heat-treated steel bars for concrete, etc.

Grade rebar Grade rebar Grade rebar Grade rebar Difference between grade rebar,:

1.Grade rebar (rebar).

Its strength class is 24 38 kg and is made of calm, semi-calm or boiling steel.

No. 3 ordinary carbon steel rolled round steel bar. It is a low-strength steel bar, which has the characteristics of good plasticity, high elongation and wisdom (δ5 above 25), easy bending and forming, and easy welding. It has a wide range of uses, and can be used as the main stress reinforcement of small and medium-sized reinforced concrete structures, stirrups of components, tie rods of steel and wood structures, etc.

Wire rod rebar can also be used as a raw material for cold-drawn mild steel wire and double rebar.

2.grade rebar (rebar).

grade reinforcement. It is rolled with low-alloy calmed steel or semi-calmed steel, with silicon and manganese as solid solution strengthening elements. The strength level of the grade steel bar is 34 (32) 52 (50) kg, which has high strength, good plasticity and ideal welding performance.

The surface of the steel bar is rolled with long longitudinal bars and evenly distributed transverse ribs, so as to strengthen the bond between the front seepage between the steel bar and the concrete. With grade steel bar as the stressed steel bar of reinforced concrete structure, can save steel 40 50 than using grade steel bar. Therefore, it is widely used in large and medium-sized reinforced concrete structures, such as bridges, dams, port projects and the main reinforcement of housing building structures.

After cold drawing, the grade steel bar can also be used as a prestressed steel bar for the building structure.

3.grade rebar (rebar).

The main performance of the grade steel bar is about the same as that of the grade bar, and the strength level is 38 58 kg.

This is absolutely not, the largest rebar disc steel is cold-rolled ribbed steel 9, which has been not allowed to be used in the project.

It's back, hehe, it's hard to buy it if you want to.

ps: Hehe, impossible, unless his steel bars are cold-rolled steel bars, when the hot-rolled ones are sold to you, such steel bars are processed by small steel mills, you go to the laboratory to do an experiment, you will know, his bending elongation is not enough, and the strength is too high, hehe.

As long as it is rebar, it cannot be coiled up like a wire.

The rebar of our Liugang bar has never been coiled up, it is the wire rod factory that is coiled up, and our 12 steels are divided into fixed length and non-ruler! Beware of people in the steel shop lying to you.

The threaded steel bar has strong bonding ability with concrete.

No, only the wire can be coiled, and nothing else.

Example: 2SG12 Logo Shougang Products: Grade 2 Steel Shougang 12mm Thread 2HG12 Logo Handan Steel...

2ya12 logo Angang...

2CG12 identification bearing steel...

2LG12 logo Linggang...

2XG12 logo Xuangang...

2TG12 logo Tangsteel...

Round bar: Round bar refers to a solid strip of steel with a circular cross-section. It is mainly used to make stainless steel round bar parts and seamless steel pipe blanks.

Rebar: Rebar is a common name for hot-rolled ribbed steel bars. The grade of ordinary hot-rolled steel bar consists of HRB and the minimum yield point of the grade.

In the civil drawings, the symbols of round steel and rebar are as follows:

Rebar is widely used in the construction of civil engineering such as houses, bridges, roads, etc. From highways, railways, bridges, culverts, tunnels, flood control, dams and other public facilities, to the foundations, beams, columns, walls, and slabs of housing construction, rebar is an indispensable structural material. With the deepening of China's urbanization, the vigorous development of infrastructure construction and real estate has a strong demand for rebar.