Rebar Detailing provides key instructions to personnel on the construction site. Essentially, these are drawings that communicate the placement of reinforced bars (rebars) on the site. Rebars or steel rods are used to reinforce concrete. Through drawings, a rebar detailer guides an iron-worker about the exact location where the steel rods have to be placed before pouring concrete over it. This process is integral to the structural integrity of the building throughout its lifetime. These drawings are prepared on the basis of interpreting the structural engineer’s drawings.
The structural engineer on the project is responsible for determining how much rebar content is needed in each component of the project starting from the foundation to the ground up. Their calculation provides the size, spacing, zoning, layer of the rebar, and other elements. This is essential to determine the amount of rebar needed to preserve structural integrity. Field personnel is not conversant with an engineer’s drawing, hence a rebar detailer is handed over the responsibility of creating practical set drawings that are easily understood.
practical set drawings that are easily understood.
The final output that comes from a rebar detailer is two documents - a bar-bending schedule and rebar placement drawings. Now let’s look at the objectives of rebar detailing.
Visualization: The detailer working on software is able to visualize and see what they are creating with a better understanding of various levels of development to adjust and accommodate things according to requirements.
Attention to Minor Details: 3D rebar detailing enables deciphering of minute details on a project. For e.g. one can notice if a bar is sticking out of concrete and how it is interfering with factors such as structural steel, mechanical, and plumbing.
Avoids Clashes: 2D detailing does not allow for such intricate attention to detail until it gets detected on-site, creating a situation for strained communication along with the loss of time and money. In contrast, 3D detailing helps early detection of clashes.
There was a time when rebar detailing used to be done with excel sheets and hand calculations. With time things have improved and construction companies are keenly aware of the wastage of resources and associated risks that follow when detailing is not done. The future is geared towards 3D rebar detailing as the technology continues to improve in this domain.