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How to Build a Slab Footing



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A concrete slab is a common structural element of modern buildings. Horizontal slabs of steel reinforced concrete, typically between 100 and 500 millimeters thick, are most often used to construct floors and ceilings, while thinner slabs are also used for exterior paving.
In many domestic and industrial buildings a thick concrete slab, supported on foundations or directly on the subsoil, is used to construct the ground floor of a building. In high rise buildings and skyscrapers, thinner, pre-cast concrete slabs are slung between the steel frames to form the floors and ceilings on each level.
On the technical drawings, reinforced concrete slabs are often abbreviated to “r.c.slab” or simply “r.c.”.

In situ concrete slabs are built on the building site using formwork – a type of boxing into which the wet concrete is poured. If the slab is to be reinforced, the rebars are positioned within the formwork before the concrete is poured in. Plastic tipped metal, or plastic bar chairs are used to hold the rebar away from the bottom and sides of the form-work, so that when the concrete sets it completely envelops the reinforcement.

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24 comments

  1. What is the gap between horizontal and vertical reinforcement while making a mat

  2. I made it about three weeks ago. On woodprix website I learned a lot about it. Check it mates.

  3. I've found great handbook on woodprix website. Good solutions for everyone I think.

  4. 2 hour search for these finely explained 3 minutes . Thanks

  5. Iliyahs Abdulrahman

    cudos to engineers

  6. send more resources

  7. I found this book full of good ideas [ Check Details Here⇒>https://paper.dropbox.com/doc/My-Shed-Plan-OcMcPKuDVYpKlAmwuZcDy ] . I am not very talented when it comes to measuring once and cutting twice…. So get the book use it for ideas THEN have someone else build the shed for you. When you have finished with the book donate it to your local library!

  8. why footings are drawn with an angle or chamfer, when digging its square????

  9. I made it myself. Just go to WoodPrix webpage if you'd like do the same ;D

  10. can gophers weaken the foundation if they dig under it?

  11. I bought instructions from woodprix and I builded it very very cheap.

  12. Hey, did you hear that Hyezmar is giving his woodworking plan collection at no cost at all? Google him, there's another great design for this project if I'm not mistaken.

  13. I m trying to get a extention to the rear house. but as the builders dig up the foundation water and soft sand came .. I was told I need to get steel mesh. . but I couldn't find any vedio that has my problem and how to fix it

  14. Please upload building/home rough estimation videos not software videos its makes us confuse
    your videos is very helpful

  15. What's the average number of inches of topsoil/sod to remove for a garage? I can't see much of a color change

  16. Mat slabs have grade beams so, depending the structural design, you can build columns above the mat.

  17. A mat foundation is a combination of footing and slab. In ohter words, the slab is thickened to take the job of the footing. These foundation s are very common on areas where the terrain moves and the slab could crack or fail

  18. nice video thank you

  19. Hi Joe, depending on your soil conditions, you will need to find solid soil first and then build you pad up with compacted native soil or other materials like rock or base. this is only a suggestion I hope this helps!

  20. I want to pour a concrete slab 3 1/2" thick for a barn. The problem I have is the slope of the ground is approximately 20" difference over a 24' span. I need to build the lower side up for drainage. What should I do to build the lower side up level?

  21. Hi all! Thank you for Tue great comments. Maria, thank you for your question, the top of my form is actually a 2" curb, and my finish floor is below the form. The reason is built this way is so we can create a separation curb between the outside grade and the building. Hope this helps! Plz comment back

  22. Very helpful. When you talk about the finished floor elevation being at the level of the wood (top) or higher, your hand above the top of the wood refers to a different case having a higher floor? Thanks in advance.

  23. Lifeprint Tributes

    thankyou for this series

  24. awesome! Very helpful, thanks.