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  1. The hidden beam is a reinforced concrete beam, also called concealed beam provided within the depth of supporting slabs.

    So, the depth of the hidden beam is the same as slab depth as it can be noticed in the above figure.

    Oncealed beams are popular and form an essential part of modern reinforced concrete framed structures.

  2. I am truly glad to read this blog posts which includes plenty of useful data, thanks for providing these statistics.

  3. Can i overlay a new slab of 4 inch thickness with 12mm bar reinforcement over a existing slab?
    existing slab size 40*40 and is supported by 8inch beams and pillars?

    1. Overlaying a new slab over an existing slab is possible in certain cases, but it requires careful consideration of several factors. Here are a few key points to keep in mind:

      1. Structural Assessment: Before proceeding with the overlay, it’s important to conduct a structural assessment of the existing slab, including its condition, strength, and ability to support the additional load. A qualified structural engineer should evaluate the existing slab, beams, and pillars to ensure they can accommodate the new slab and reinforcement.
      2. Load Capacity: Determine the load capacity of the existing slab and compare it with the expected load from the new slab. The combined load should not exceed the capacity of the supporting elements. If the existing slab is not designed to support the additional load, strengthening measures may be required.
      3. Compatibility of Materials: Ensure compatibility between the existing slab and the new overlay in terms of material properties, such as thermal expansion and contraction. Differential movements between the two layers could lead to cracking or other structural issues.
      4. Bonding between Layers: Adequate bonding between the existing slab and the new overlay is crucial. Proper surface preparation, such as cleaning and roughening, is necessary to promote a good bond. Additionally, the use of bonding agents or epoxy can enhance the adhesion between the layers.
      5. Reinforcement: The additional reinforcement (12mm bars in your case) should be properly anchored into the existing slab to ensure load transfer between the layers. Adequate lap length and anchorage detailing should be provided as per engineering standards.
      6. Height Considerations: Adding a new 4-inch thick slab will increase the overall height of the structure. Ensure that this additional height will not create issues with door thresholds, access ramps, or other architectural elements.

      It’s important to note that the specific requirements and recommendations may vary based on local building codes, design standards, and site-specific conditions. Therefore, it is highly recommended to consult with a qualified structural engineer or design professional who can evaluate the specific details of your project and provide appropriate guidance.

      They will be able to assess the structural feasibility, provide design recommendations, and ensure that the overlaying process is carried out correctly to ensure the safety and integrity of the structure.


  4. Hello

    Can we have a complete concelead beam with 20mm rods for RCC slab . Considering I have one coloumn every 10 feet in a 30*20

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