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Dk
( 814 posts )

[39 Replies]
I want to know the thickness (slab) of roofs, which can be considered safe.

What if there is a roof 7 inch thick, on non pillared walls with no iron supports beams on walls, being reinforces with 7 inch more slab (cement, sand and very fine concrete).

So that total thickness comes to 14 inch, will it be risky?

    1930 days ago In Building Maintenance
    Post Answer
    HT
    (1115 posts)
    14 inch....the weight itself would be way too much......one more thing never heard of 14 inch slab unless its a bunker
      1930 days ago 

      Dk
      (814 posts)
      But what if its once done and is intact and dry now?



      so will it be safe after months , i mean no more wt issues , as wt will be distributed in all sides,



      if you can understand ,what i mean
        1930 days ago 

        HT
        (1115 posts)
        If the wt is evenly distributed than it should b ok
          1930 days ago 

          Muhammad imr..
          (408 posts)
          14 inches are too much its a wastage of money and if not properly reinforced slab will deflect due to own weight. For smaller spans 5 inch of RCC and 3 inch of floor finish is enough.
            1930 days ago 

            Million$$$
            (441 posts)
            RCC slab of roof should be 9 inch.....with 4 inch floor, plaster on ceiling side, etc total finished roof may be 13.5 inch....
              1930 days ago 

              Yousafzai 00..
              (124 posts)
              Thickness of roof slab depends on alot of factors but mainly span....

              In residential construction it is generally kept from 4 to 5 inches...
                1930 days ago 

                Annie
                (141 posts)
                I think 14 inch roof is good for construction and safety measures.
                  1921 days ago 

                  Dk
                  (814 posts)
                  Well i will wish an answer from civil or structure engineer,

                  or

                  any reputable construction company ,if they have the clues, and predictable out comes of the slab,,
                    1910 days ago 

                    FS
                    (24 posts)
                    It definitely depends upon the span of the slab... Normally 5-6 inch thick slab (without any finishes) should be alright for 12 ft to 16 ft span. But if the span increases, the slab depth also increases.



                    (A civil engineer)
                      1909 days ago 

                      Baber Rabban..
                      (1628 posts)
                      But FS sb , isn't it so that steel rebar quantity should also increase along with thickness?
                        1909 days ago 

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