Concrete beam detailing is a crucial step in structural design, ensuring that the structure supports the expected loads safely and durably. Based on NBR 6118, this article addresses the main aspects of detailing, such as horizontal and vertical spacing of reinforcement and the arrangement of stirrups, offering a practical and technical guide for engineers and designers. 📌 MINICOURSE TRACE THE DRAW - Learn how to calculate the concrete mix at a time with a step-by-step guide http://estruturasebim.com/comece-por-... ⌨️ Material Calculator Spreadsheet for the work https://bit.ly/PlanilhaCalculodeMater... 👉 Visit our website and guarantee your materials https://estruturasebim.com ⭕ EQUIPMENT AND BOOK: 💻Notebook that I use to design WITHOUT FREEZING: https://amzn.to/3zuIkEH ⌨️ Calculator model that I use to calculate: https://amzn.to/3oqi0oP 👉 📚Book Calculation and Detailing of Usual Reinforced Concrete Structures: https://amzn.to/3jfyFbX Hello, how are you? The detailing of reinforced concrete beams is essential to ensure safety and structural efficiency in civil engineering projects. In this article, we will address the main aspects of beam detailing, according to NBR 6118:2023, including the horizontal and vertical spacing of reinforcement, in addition to the importance of stirrups. What are concrete beams? Reinforced concrete beams are fundamental structural elements that support loads and transfer them to the columns. Their correct dimensioning prevents excessive deformations, cracking and structural failures. Standards for detailing: NBR 6118 NBR 6118:2023 is the Brazilian standard that governs the design of concrete structures. It establishes requirements and good practices for detailing reinforcement in beams, ensuring that the element meets the conditions of safety, functionality and durability. Horizontal and Vertical Spacing The spacing between longitudinal reinforcements (horizontal and vertical) is one of the most important issues in detailing. According to NBR 6118, the following criteria must be observed: Minimum spacing between longitudinal bars: Must be greater than the diameter of the largest adjacent bar or 20 mm. This spacing ensures the passage of concrete during concreting and prevents problems with adhesion and cracking. Vertical spacing between layers of reinforcement: Must be at least 20 mm or equal to the diameter of the largest cross bar present, ensuring sufficient space to accommodate the concrete. These guidelines ensure that the concrete is properly distributed and compacted, reducing the risk of porosity or failures in the steel-concrete connection. Stirrups: function and detailing Stirrups play an essential role in concrete beams. They provide shear resistance and help to keep the longitudinal bars in the correct position. Stirrup spacing: In critical areas (close to the supports), the spacing should not exceed d/4, where d is the useful height of the beam, according to NBR 6118. In less demanding areas, the spacing can be increased, as long as it does not exceed 30 cm. Minimum stirrup diameter: Typically, bars with a diameter of 6.3 mm are used for smaller beams and 8 mm for larger structures. Practical tips for detailing beams 1. Identify critical areas: Check the stress diagrams to adequately reinforce the most demanding areas. 2. Pay attention to coverings:** NBR 6118 recommends a minimum covering of 25 mm for indoor environments and 30 mm for moderate exposures. 3. Be careful with congestion: Avoid excess reinforcement in a single section, as this can make concreting difficult and compromise adhesion. Good studies. A BIG hug! Eng° Pedro Rodrigues