What does rebar rebar reproduction mean? What is the purpose?

The purpose is to guide the construction, for example, there is a main reinforcement and bending reinforcement in a beam, and the schematic diagram of these steel bars must be drawn in response, marked with how long the reinforcement is, and how long the reinforcement begins to bend at that position, what is the bending angle, and how many such reinforcements are needed, so as to guide the processing of steel reinforcement.

The word "proofing" was originally a dialect of the folk in North China, which refers to the carpenter who makes a detailed processing list and draws a processing diagram when calculating the materials according to the drawings. Now it is mostly used in steel engineering, and the steel bar sample is more technical than the woodworking sample, and the calculation process is complex and cumbersome, and it is gradually developing into a new profession.

The purpose is to guide the construction, for example, there is a main reinforcement and bending reinforcement in a beam, and the schematic diagram of these steel bars must be drawn in response, marked with how long the reinforcement is, and how long the reinforcement begins to bend at that position, what is the bending angle, and how many such reinforcements are needed, so as to guide the processing of steel reinforcement.

Manual operation. Alternative steel bar sample auxiliary tool is made of EXCEI electronic ** template module, generally speaking, compared with the formal sample software function is greatly inferior, but than manual calculation, the work efficiency is many times higher, if it can be prepared well, the future may one day be comparable to the regular sample software.

Planar representation.

Before the advent of "plane representation", the steel bar sample is the same as the carpentry sample, the technical is not too strong, the operation is relatively easy, the drawing design at that time has many cross-sectional drawings, as well as the steel bar batching table, as long as you have a certain construction experience can undertake the sample work, from design to construction, has formed a set of independent professional system, the country adopts the "plane representation" invented by Professor Chen Qinglai, which can greatly simplify the design, facilitate computer drawing, and greatly reduce the mental work of the designer, Improve the work efficiency of architectural drawing design, so that the reinforcement project on the track of specialization and standardization.

The plane representation method is divided into two major contents, "annotation mode" and "construction practice", which summarizes and analyzes the various reinforced concrete components in the building, classifies and analyzes, and makes detailed provisions on the design and construction in many aspects such as mechanical properties, technical indicators, and operational requirements after theoretical calculation and on-site investigation, destruction experiment and other technical measures.

Rebar resampling refers to the construction technician who calculates the materials according to the drawings to make a detailed processing list and draw a processing diagram. It is difficult technical mental work. The calculation process is complex and cumbersome, and needs to be accurate, reasonable, and optimized.

It's difficult.

The reinforcement rebar reproofing aid tool can be made by the formwork module made by electronic **. In general, it is far less powerful than a formal software modification, but its work efficiency is much higher than that of manual calculations. If compiled well, maybe one day it can be comparable to regular modding software.

Pluralistic theory. 1. The theory of rebar rebar remodeling: due to the limitations of theory, experience and knowledge, the calculation results of rebar rebar resampling have great deviations.

2. The reliability theory of reinforcement calculation: it must be accurate, fair and reliable, and leave no trouble.

3. All information theory of rebar reincarnation: integrate all engineering drawings and changes in the rebar file, as well as the information of additions and subtractions in the construction process. Every number has a history.

The rebar sample is a technician, rebar foreman or team leader at the construction site, who pulls out the list in detail and draws the assembly composition in accordance with the requirements of the national design and construction specifications for various steel bar styles, specifications, dimensions and locations in the construction drawings and structural drawings, as the basis for the production and assembly of the operation team.

The formula for reinforcing steel bar is as follows: how deep is the reinforcement anchorage, three anchors of straight bending machinery, straight anchor check table according to the concrete number, multiplied by the diameter of which type of rib, straight anchor is not enough to bend the anchor turn, zero point four times is true, bending anchor turn is 15 days long, upper iron and lower iron force, mechanical anchorage is divided into three categories, oblique hook steel plate welding short ribs, oblique hook short ribs are five days long, zero point seven anchors in mind. <>

How deep is the reinforcement anchorage, that is, the full length of the reinforcement of the component extending into the other component. Focus on figuring out where to reach out.

There are three anchors for straight-bending machinery, and there are three types of reinforcement anchorage: straight anchors; Bent anchors and mechanical anchors.

Straight anchor checklist by concrete number, 101 atlas page 33 minimum anchorage length of tensile reinforcement.

Multiply the diameter of which type of reinforcement, look at the left column of the above two tables, the type and diameter of the reinforcement, according to the concrete strength grade of the first row.

When the width of the straight anchor member does not reach the specified size, the curved anchor should be used, and the end of the steel bar should be added with a 15D right-angle hook.

Zero point four times is true, when using a curved anchor, the length of its protrusion into the support, take the anchorage length of the double.

The length of the bending anchor is fifteen d, and when the bending anchor is adopted, the end of the rebar is bent into a right-angle hook, and the length of the right-angle hook is 15 times the diameter of the reinforcing bar.

Regardless of the upper and lower longitudinal bars, for the frame beam, the anchorage value must be reached at the end.

There are three types of mechanical anchoring, see the three small figures and captions in the middle left side of page 35 of the 101 Atlas.

Diagonal hook steel plate welded short ribs, (a) is an oblique hook, (b) is a steel plate, (c) is a short rib.

The length of the short rib of the oblique hook is 5d, (a) the length of the straight section of the oblique hook is 5d, (b) the length and width of the steel plate is 5d, and the length of the short rib is 5d.

0.7 anchor is recorded in Sibixin, regardless of seismic and non-seismic resistance, the anchorage length is double the anchorage length.

The straight anchorage of the non-frame beam is short, and the anchorage length of the non-frame beam is not the same as that of the frame beam.

Twelve times d is deep enough, and the anchorage length of the lower longitudinal reinforcement of the non-frame beam is 12 times the diameter of the beam.

The structure of the waist bar is 15 days, and the anchorage length of the construction of the waist bar is 15 times the diameter.

The waist tendon is torsional and the main tendon. The anchorage length of the torsional waist bar is the same as that of the lower stressed longitudinal bar.

The amount of reinforcement refers to the number of reinforcements required for the project, which generally needs to be added with a certain amount of loss, and the actual number is a little different from the sample. Strict steel bar sample refers to the size and bending position of the actual cutting of the steel bar, which should be considered in the bending growth of the steel bar and the cutting and batching of the fixed length steel bar, as well as the matching of the remaining steel bar after the steel bar is trunched, is welding (manual arc welding, electroslag submerged arc pressure welding, flash butt welding, etc.), binding, mechanical connection and other issues, Qilu imitation is the structure of the reinforcement, the length of the reinforcement should be considered. Whether the sample is done well or not has a great relationship with saving the amount of steel.

According to the design drawings, specifications and structural requirements, processing and production technology and acceptance standards, the different steel grades and specifications configured in the components, the blanking, processing and forming size, processing quantity, and installation position of each steel bar are accurately calculated, the steel bar cutting size details are determined, and the processing (installation) drawings are drawn and submitted to the production (processing) team.

The steel bar budget is based on the different steel grades in the design drawings, with cast-in-place components, prefabricated components, and prestressed components respectively, and the specification ratio of steel bars, the varieties and dosages of steel bars are comprehensively considered and calculated according to the quota or similar engineering experience.

The on-site construction of steel bars requires high precision and low budget.

In fact, your idea is not entirely right, as long as you have the technology to be a construction worker, find the problem first arrange the following people to deal with, if the following is not implemented, you can report it, this is the responsibility of the construction worker! As for the project manager, according to your current situation, you need to exercise your communication and coordination skills, after all, the project manager is the principal of Party B on a construction site, and communication and coordination are essential. If you want to flip the sample, I think you should be able to understand the drawings very clearly, right?

It is recommended that you buy a basic atlas to familiarize yourself with the specifications, shear walls, beams 03G101-1. Disc base 04G101-2. Stairs 03G101-2.

Cast-in-place plate 04G101-4. Stand-alone base 06G101-6. Hope it helps.

I'm depressed, I typed a few hundred words and directly pressed the wrong all to clear, I directly said the key points, on-site experience, learning norms, look at the atlas, don't be afraid to turn the sample for you, and then change it if you are wrong, you will know that you are ** insufficient, and it will be good to have a second time、、、

You have to come out to find the problem, and stay on the scene more. Look more, don't think you can't see what you can't do, think it's very simple, don't think it's simple to get started with steel, and there are many things that can't be found at a glance.

Although the speed of computer sample transformation is very fast, there will be many defects in the actual construction, so it is rare to use computer sample transformation construction in the actual project. It's very convenient to use for calculations

Solution: Attention needs to be paid to the rebar reinforcing bar sample:

1. The seismic grade of the building is related to the anchorage, lap length, whether to use seismic steel bars, etc.;

2. The position of the embedded end is related to the encryption height of the column reinforcement;

3. The general anchorage and lap length of civil air defense projects are higher than those of general buildings;

4. Attention should be paid to the inconsistency of the seismic grade of the local part of the design;

5, the first vertical reinforcement position of the shear wall on the outside of the dark column, the position of the first reinforcement of the plate reinforcement on the outside of the shear wall or the beam, the protective layer is determined (the 11g version has been changed to the protective layer of the outermost reinforcement) and so on.

In short, it is necessary to be familiar with the atlas and specifications, and contact the design in time to solve the ambiguity.

In the entire project cost, steel bars account for a large proportion, especially in recent years, the steel bar has remained high, which has attracted the attention of the owner and the construction unit. At the same time, due to the complexity of the reinforcement calculation, it is more energy-consuming and time-consuming to reconcile. Please talk about the points and skills that need to be paid attention to in the rebar rebar reproofing and the lessons learned in the reconciliation process.

Ask peers and masters, what are the main places where the following components are prone to errors and easy to produce justice, whether manual or software? 1. Strip foundation 2, independent foundation 3, column 4, beam 5, plate 6, shear wall 7, staircase, etc.

Why didn't anyone reply, do you calculate your steel bars yourself or entrust them to a professional sample company?

It's all entrusted to the individual to do it, and I find the steel foreman to do it, but now there is a graphic calculation, and it is a little better, and it is not a loss to calculate a little more

It is not complicated to say that the rebar is complicated, and it is not simple to say that it is simple. The focus is actually on three aspects (personal opinion): 1

Basics: calculation of rebar length, calculation of elongation values for various bending angles. 2.

Technical knowledge: the thickness of the protective layer, the lashing lap coefficient, the welding lap coefficient, the distribution of the stiffener at the stress position of the component, and the principle of the distribution of the supporting reinforcement (how much slab thickness is required to set up stool bars) familiar with the 03G101 steel bar specification. 3.

Experience: Understand the routine practice of steel bar fabrication and binding on the construction site. In general construction, the construction is basically carried out in accordance with the steel bar specifications, but there will also be small hands and feet in some places.

No matter where you work, you have mastered these, and in the face of owners and auditors, you know where you can calculate more (owners and auditors are basically calculated in accordance with the specifications); In the face of the construction party, be familiar with where they will have moisture, which can be easily deducted! Of course, what should be given must be given!

The point is that many owners are very cheap now, and they don't give what they should give!

I top, the key is the steel bar in the foundation, pay special attention to the collection well and other complex places, do excel ** to calculate the steel bar, very convenient! I've always done that, and it's very efficient! With more snacks, you can do a good job and calculate the steel bars well!

There's no trick either! Then look at the four atlases of 03G101 4, and then combine them with reality, and it's OK!