Not-to-miss Practices and Techniques for Rebar Detailing

If you are not familiar with construction terms you might have missed the word Rebar. However, you must have seen it many times and have probably even paid for it if you have been a part of any construction work. A rebar is basically a steel bar acting as a reinforcing tension device to add to the strength of concrete structures.  In reference to that, rebar detailing is a discipline or a practice of showing these structure reinforcements for construction through shop drawings or fabrication drawings. These are essentially done using rebar software like AutoCAD and Revit.  

Rebar detailing is done by rebar detailers who essentially prepare design drawings that provide rebar details aiming for the required strengths by formulating for and applying rebar size, spacing, location, and lap of steel. 

Rebar Detailing Essential Practices 

These are some essential practices and techniques to follow for effective rebar detailing: 

1. Include Hooks or End Treatments in the Rebar Shape Definition 

When working on concrete slab rebar detail, you have to modify the design determining the right placement of rebars by adding hooks or end treatments to it. This can be further iterated for other components by creating a template for it.  

Here’s how you can do it easily: 

a) Tabs to navigate: Structure tab > Reinforcement > Reinforcement settings > General

b) In the Rebar Shape definition right-check the ‘include hooks’ box while making sure there is no rebar already placed there.

 

 

 

2. Make a Valid Rebar Host

To make a project element a valid rebar host, you need to make it a part of the ‘Structural’ category and get the ‘Material for Model Behavior’ in the family and further set it to ‘Concrete’, ‘Precast Concrete’, or ‘Other’ options.

This is how it can be done:

a) Edit the generic model family.

b) Inside ‘Edit Family’, without selecting anything go to the properties palette and put a right tick on the ‘Can Host Rebar’ parameter checkbox.

c) You can also find this parameter available in the ‘Family’ category and ‘Parameters’ menu.

3. Find the Rebar Host

As you select a rebar in the detail rebar drawing, you will see the corresponding host showing the concrete cover. In various scenarios, you may see that rebar is cleanly placed inside the hosts and both offers have a good visibility. However, in many cases, rebar may not be seen properly as it is placed far from the host.

Here’s the process of finding the Rebar host:

Select the rebar that needs to be treated for rebar footing detail.

Go for the ‘Select Host’ command in the ribbon.

OR on a right click use the ‘Select Host’ command in the flashing menu.

 

4. Setting the rebar cover in an effective way 

Cover settings are instance parameters that are associated with each structural element. If you select any of these elements and look at the properties pallet, you will see the structural group.

You can set the cover from here for the specified element also as per the face of elements 

(i.e. - Top, Bottom, and others).

Personalize and add new cover settings:

Go to the Structural Tab and Reinforcement menu. Click on Rebar Cover Settings. Here you can add all the different covers you need for the project.

 

One more option is to specify the cover of an element in the "Edit Rebar Cover" tool. Here you can find two options (a) Pick elements & (b) Pick faces.

(a) Pick elements 

This option really works well with elements that have a consistent cover on all sides, such as a column or elevated slab.

(b) Pick faces

In this option specifying the cover is by selecting a face of an element by using the pick face in the "Edit Rebar Cover" tool. This gives great flexibility to specify the cover for each face of a single element.

5. Rebar placement options

There are a couple of different options to select in the Placement Planes and Placement Orientation Panels:

1. Placement Planes

The Planes define where the rebar is placed in the host. Click one of the following placement planes from Modify > Place rebar tab > Placement Plane panel

• Current Work Plane
• Near Cover Reference
• Far Cover Reference

2. Placement Orientation

The orientation defines how the rebar is aligned when placed in the host. Click one of the following placement planes from Modify > Place rebar tab > Placement Orientation panel

• Parallel to Work Plane
• Parallel to Cover
• Perpendicular to Cover

If you are looking at a section that is perpendicular to the element, choosing ‘Parallel to Cover’ will draw a bar perpendicular to your view, and choosing Parallel to Work Plane will draw a bar that is parallel to the section view.

6. Rebar Annotations for creating 2D drawings

Tagging Multi-Rebar Annotation:

A multi-rebar annotation allows you to tag multiple rebar and rebar sets with a single annotation. Here you can select multiple aligned rebar and display the dimensions between the rebar references, as well as parameter data. To use this, there must be at least two rebar references.

        Click Annotate Tab > Tag Panel > Multi-Rebar

Rebar Presentation:

Use this tool to specify how rebar sets are shown in a view. The bar presentation scheme simplifies the view while maintaining an identifiable footprint in which the rebar set is placed.

7. Rebar Visibility Settings and Presenting 3D Rebar

View Visibility States:

By default, rebar elements in a 3D solid model are contained within host elements, and in hidden line view, they are obscured by the host. You can set overrides for each view in a project, so the rebar design can be documented. Each rebar element has a view visibility setting, which is an instance property.

 

                

To change rebar visibility:

You can follow these steps to accomplish this:

1. Select all rebar instances and rebar sets to be made visible. To select multiple instances, hold down the CTRL key while selecting.
2. On the Properties palette, click the ‘View Visibility States Edit’ button.
3. In the “Rebar Element View Visibility States dialog”, select the views in  which you want the rebar to be viewed unobscured.
4. Optionally, select the 3D views in which you want the rebar to be viewed as solid.

• View Filters

Filters provide a way to override the graphic display and control the visibility of elements that share common properties in a view.

To start creating Filters, you need to go to View Tab > Graphics Panel > Filters.

1. Create new filters and make sure to give them an appropriate name to make it easy for users to understand what the filter is for.
2. Select the category you would like to utilize (in this case it will be the Structural Rebar).
3. Add the Filter Rules and then select the desired parameter and name to filter by.  

Next, go to the View Tab > Graphics Panel > Visibility/Graphics.

Select the Add tool to start adding all the filters you create in the previous step. After that you can start changing the line and pattern color for each filter you have, you can also hide the Rebar from a specific partition by unchecking the visibility check box.

 

To Conclude 

These are some of the important practices and techniques to follow in Rebar detailing to get the most out of your construction project both in terms of turnaround time and quality. With these practicing hacks you have the most chances of getting sorted with rebar details and getting the best control over material handling and application when executing the project in a real-world scenario. 

To get more understanding of rebar works and rebar detailing services, get in touch with experts at Pinnacle Infotech which is one of the most trusted BIM services and Rebar Detailing companies across the globe. Domain experts at Pinnacle can take you through valuable insights and the latest technological possibilities to get the best results with rebar detailing.