Raft Foundation Explained

In this video we will be learning about Raft foundations, also known as Mat foundations via 3D animation. They are a type of shallow foundations. Types of Raft foundation will be shown which are concrete raft with drops, raft with beams / ribs and raft with piles.
In the later part we will see reinforcement detailing in raft foundation. It will cover the top and bottom mesh, punching shear reinforcement in the form of shear links or shear studs, additional reinforcement, column stirrups and vertical reinforcement.
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#Concrete #Raft #Foundations

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[@Ravi_Raj_ISM]

hi
which software do you use?

[@shwetasingh5741]

Saw so many videos.
But you explained it in the easiest way
Thank you

[@e-studio2368]

I'm currently working as an intern on construction site, this really helped me understand the raft foundation which is used on the site, many thanks!

[@Fratasims1]

Excellent Presentation! Clarity, and Great Graphics! Sincere thanks!

[@iRamon471]

Thank you for you video! It's really helpful, keep on doing it:)

[@khawarnaseem7734]

very good vids,,shabash👌

[@GrundligEngineering]

This is great! Thank you very much.

[@user-qt4bv6jk6w]

Good one🎉

[@brianmugabi7516]

Well explained. Thanks

[@tajsay]

Very well explained thank you so much

[@alisharif1997]

Happy to see this video 🏗️🏗️🏗️🏗️🏗️🏗️🏘️

[@umairilyas7104]

Keep it up...

[@themeditationangel7395]

Thank you @Structures Explained for the video, would you mind letting me know what software you used for the Animation? it's really cool

[@maxwellmc9734]

Excellent 👍

[@zagritiquader4663]

Very clear explanation. Thanks!

[@jairajz4543]

wlcm

[@Szhihihihihihi]

Thanks !

[@abhinavanand4884]

Thank you..

[@barbaraabuzek7471]

Very good film. I have a question how do you design a mat foundation on the pile ? How does it work this kind of slab ?

[@engr228]

very nice

[@ganeshbabu3260]

Way of explanation and visual is super sir

[@StructuresExplained]

Thank you Ganesh!

[@sameerpawar779]

Kdkk

[@ibrahimjafaru6031]

Nice ,I love it..
But please can you do a clearer animated video ,of the placement of additional second layer of reinforcement ,in a raft foundation

[@Innotutorial]

Nice video sir. Please what software do you use? As I am also making videos about Civil Engineering. I will.try to implement this method of teaching. Please what software?

[@kilobyte7814]

Nice

[@shahanawazahmad9541]

Here we are providing 50d lap length in tension zone and 40d in compression zone on my project. I want to know about tensile and compression zone specially in raft please.

[@T5Chur]

noice

[@vi683a]

Where would you consider a raft foundation with shallow (3'ft) column footings?
I have some loamy acreage that does not experience frost EVER but some pretty good down pours periodically.

[@ericphan5857]

With good design foundation we could apply green house advance green house agriculture teleporting food and supply , remote sensing using MAD, and counter seimic wave resonance prevent earthquake and also survive flooding

[@vijendrarawat8306]

Is there any thumb rule to decide whether what depth to consider for raft?

[@StructuresExplained]

No, it depends on various factors like concrete strength used, column/wall load, soil properties, water uplift, reinforcement provided, punching shear, etc. In short, analysis is required to find depth of raft.

[@tshepomakhado5500]

Decent video. I just hoped it would touch on the reinforcing of the beams

[@StructuresExplained]

Hello Tshepo, you can find beam reinforcement explanation in this video th-cam.com/video/YNJQvkYc60E/w-d-xo.html

[@ajazsayyed8487]

Best sir . Plz tell me about drop or step in raft.

[@StructuresExplained]

Hi Ajaz, drop below the columns resist the punching shear in the raft. Due to increased thickness locally, column will not punch inside raft. Additionally, drop increases positive moment capacity of the raft locally, whic means raft can take higher moments below the column. Hope this helps. :)

[@ajazsayyed8487]

@@StructuresExplained thank you so much.

[@nebusamuel86]

This foundation mainly what kind of soil we can use.. I mean indication in what type of area or land

[@StructuresExplained]

Site with poor soil conditions.

[@nebusamuel86]

Engineer also told pillar foundation, soil codition moderate.. Which is more stronger and durable

[@MohamedJamir-pl8nw]

You mention of shear reinforcement around column is nothing but beam connecting all the other column or something else.. someone explain

[@StructuresExplained]

Hi Mohamed, the shear links or studs mentioned in the video are not of beam. For this video, column is directly resting on raft.

[@MohamedJamir-pl8nw]

@@StructuresExplained in shallow foundations we give plinth beams incase of raft there is no such beam connecting other columna all together ?

[@StructuresExplained]

Depends on design, if required raft can also have beams connecting column to column.

[@aliqadri4672]

4:00 if the above columns are of steel the lap reinforcement is not needed ???what you mean by that????

[@StructuresExplained]

Hi Ali, in the video columns are of concrete and some part of reinforcement is left for lapping upper construction of columns. If the columns were of steel, there is no reinforcement and just a pedestal will be required at base.

[@aliqadri4672]

@@StructuresExplained you mean if upper colum is type of steel I beam type or not concrete type then we dont need lapping bars and we only need below concrete column for pedestal.?????

[@StructuresExplained]

That is correct

[@aliqadri4672]

0:59 column load are unequaly distributed what does that mean..??

[@StructuresExplained]

Hi, that means some columns are loaded heavily than others

[@alisharif1997]

🏗️🕌🕌🕌🕌🕌

[@onizukaval]

w8 a min where's the plastic hook

[@kshitizgautam5412]

Only required when we do plastic analysis of design..

[@arthurandresguanco4433]

you should had someone with good english fluency helped you with audio

[@StructuresExplained]

Thank you for your feedback.

[@mruthulamaheshkumar2670]

Do the piles below have to be in alignment with the columns ? Or can they be placed with equal spacing even if it doesn't align with the column placement ?