Reinforcing steel is an indispensable part of building a house. The choice is also very important. There are many classification reinforcement, also called muscle force reinforcement means in concrete structures, by the configuration of the bending, pressure, tensile and other basic reinforcement member mainly used to bear the tensile stress or compressive stress caused by the load, the effect is The bearing capacity of the components meets the structural functional requirements. The following small series is a brief introduction to the classification of steel bars.

·Rebar classification

Through long ribs: It refers to the length setting in the marked section. The diameters may not be the same. The lap joint connection can be used to ensure that the reinforcement of each part of the beam can exert its tensile strength. Pull anchored reinforcement.

Crossed ribs: refers to reinforcing bars that run through the entire length of a member (such as a beam), with neither being bent nor interrupted in the middle. When the reinforcing bar is too long, it can be overlapped or welded without changing the diameter. The cross ribs can be either stressed or erected.

Structural ribs: to meet the structural requirements, for the various factors that are not easy to calculate and do not take into account, the steel bars are constructed as structural reinforcements, such as: erection ribs and longitudinal structuring reinforcements of the middle beam of concrete structures (which are arranged in the middle of the beam side, commonly known as Waist).

Stand-up ribs: constructive reinforcements (fixed stirrups) are formed in concrete structures to form reinforcing steel cage structures. For example, a beam requires only tensile and shear stirrups, and the concrete strength in the compression zone is sufficient. There is no need for pressure reinforcements (called single-reinforced cross-section beams). In the case of reinforcing steel frames, theoretically there is no longitudinal reinforcement in the upper part of the beam, and the upper corners of the stirrups cannot be fixed. Therefore, two reinforcements are generally used on top. The two corners are calculated without regard to the force, but in fact they are under pressure, and at the same time they are used to resist the contraction stress or temperature stress of the concrete.

If the beam is configured with both tensile and compression reinforcements (called double-section beams) according to the calculation of the bearing capacity, additional erection reinforcements are not required. When the upper part of the beam has a negative moment reinforcement, the erection tendons can only be arranged on the middle part of the beam, and both ends are overlapped or welded with the negative moment reinforcement. When lapped, it must also meet the requirements of the lap length and should be tied. Strut ribs are also penetrating. As specified in the code, the ribs on both sides of the upper part of the beam must be continuous. At this time, the stand ribs can also bear a part of the negative bending moment at the support.

Distributing ribs: Distribution ribs appear in the plate and are arranged on the inner side of the stressed steel bar perpendicular to the stressed steel bar. The role is to fix the position of the stressed steel bar and distribute the load on the plate to the stressed steel bar. At the same time, it can also prevent cracks generated in the direction parallel to the stressed steel bar due to shrinkage of the concrete and temperature change.

Negative tendons: Negative tendons are steel bars that are subjected to negative bending moments. They are usually located near the support in the upper part of the beam or near the support in the upper part of the plate.

Curved ribs: The pedestal is located on the upper part of the beam (usually 1/3L when not specified) and bears the negative bending moment. The middle part is located on the lower part of the beam and receives the positive bending moment of the beam.

The relevant information on the classification of reinforcing bars was introduced here for everyone. I hope this article will help you. If you still have anything you don’t understand, you can follow our website and we’ll get back to you as soon as possible.

Concrete staircase

Espag handles are the most common type of window handle used today. A locking system with a flat metal strip which runs up the side that locks into the frame. The locking mechanism moves when the window handle is turned. They fix onto the window with two fixing screws and have a square spindle bar which protrudes from the base. This spindle slots into the lock and then operates a lock located inside the window . Approximately 90% of Espag handles have a standard fixing size, with two screws which are 43mm apart. You can usually interchange Espag handles with any other type, without having to make any adjustments.One thing to be aware of is that they also have various spindle lengths depending on the window in question, and can be a short as 10mm or as long as 60mm.Most of handles come with a 50mm spindle length as standard and this can then be cut down to suit with a normal hacksaw if necessary.

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