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Six common rebar detailing problems and solutions.

When you design reinforced concrete structures using the traditional method of using 2D drawings, you will encounter some typical problems as follows. The biggest problem that can be said is that it can take a lot of time to redo or modify the same designs. That leads to the possibility that you will slow down the project schedule, increasing costs.

Here are some of the most common problems with 2D Rebar Detaing, and how to fix them with 3D tools.

Challenge 1: Steel bars collide with each other and neighboring structures

Your reinforcement design collides with the reinforcement of the surrounding areas. This can happen for 2 reasons. One is that you may be working on a 2D drawing, where some of the actual shapes won't be easily visible. Or another reason is that you used multiple drawings to detail the different reinforcements, without any alignment between them. As a result, the rebar maker will only see conflicts at the construction site.

The solution is given: when using 3D design tools, all rebar models will be displayed in a single 3D model. The 3D model will visually show the details clearly instead of just showing overlapping and confusing lines like 2D. Thus any collision of details will be detected early. This will save a lot of time and materials.

Challenge 2: Design error of steel bar size leads to high cost.

In 2D drawings some steel bars can be identified incorrectly, sometimes due to simple typographical errors that can cause a lot of inconvenience, for example steel bars are marked as #4 instead of #14 in the process. Shop drawing process. After the steel bars are fabricated as based on the drawings, it is found that there is a difference of 30mm in the diameter of the steel bars. At this point, there will be no way to fix it except you have to replace the steel bars, which leads to slower progress and increased costs.

Solution: When you view the 3D Model you will easily detect and correct any small errors, this is possible because the steel bars will be marked separately and automatically, each code has its own color.

The 3D will render as realistic as the scene, making it easy for users to identify problems at an early stage of the design.

Challenge 3: Missing important information in reinforced concrete drawings

When creating complex reinforced concrete structures in 2D, it is not uncommon for you to accidentally miss some reinforcement details. In a plane you may not notice the missing details. These shortcomings can only be noticed after the drawing has been issued. And, you may need to redo the job.


In the workflow using 3D tools, all the details inside the project can be considered on the model very early. Having more views on the model will help detect missing parts in time and increase collaboration. Besides, with this level of transparency, the constructability of the design and the entire construction process can be quickly reviewed. This ensures that any required rebar can be accounted for and the rebar manufacturing process is consistent with the entire workflow.

Challenge 4: Adding new details to a rebar drawing takes a long time

During the design process, you may notice that specific details or sections are missing or changed and need to be added. This can be tedious, manual, and time-consuming work when done in 2D. You may need to track different versions of changes and create new drawings for these additional details.

Solution: Using 3D design tools, you can quickly create new components or views and add them to the 3D model. All parties in the project can also view and give immediate feedback on changes. Drawings are generated automatically, so there is no need to create models and separate drawings. In fact, you can get all your products from the model.

Challenge 5: Cross-planting the steel bars at the joints

The location of the pile is an important point in the design of reinforced concrete. Unfortunately, they can be ignored in 2D drawings. It is easy to get confused with “Just line” and the fact that we don't need the rebar to be mandatory in the center. But that will be better than the extra reinforcement.. This means extra work and hence, more cost.

Solution: When using 3D design tools and a buildable model, any overlaps or conflicts can be easily identified. This is because preliminary models can be generated at the beginning of the detailing process, based on design intent. Project parties can identify any high-congestion issues early in the project, and they can be remedied before construction work begins.

Challenge 6: Rebar collides with other structures

When the actual construction began, contractors from various professions began to work on site and commence construction. Unfortunately, it is common to find that different designers and contractors create separate 2D drawings. They often work without integrating the entire building design, until construction has taken place. They can find conflicts between different structures like rebar and mechanical & electrical systems.


Collaboration is essential to the success and acceleration of any construction process. These types of conflicts can be avoided by using a buildable model. The right software allows you to import models and drawings from other designers and retailers and integrate them. As a result, you get a model with all the information needed to repair your reinforcements smoothly and without conflict.

Working in 3D benefits all parties

Many of the challenges of working in 2D involve a lack of communication, shared understanding, and collaboration among project stakeholders such as rebar designers, structural engineers, contractors and builders. Subcontractors. Using 3D modeling improves the accuracy and buildability of designs, and it can improve interoperability.

This is made even better by adding an online collaboration platform to bring all sides of the project together. This way, they can see all the different designs put together – and give their feedback at the most important stages of the process.

The rebar detailer can then easily make changes and additions based on everyone's input before the drawings are finalized and issued. This improves the overall quality of the project and helps everyone on the project see the bigger picture and use their time more efficiently.

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