How to Design Two Way Slab | Simply Supported Corners Free to Lift | Limit State Method| IS 456-2000
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- čas přidán 19. 11. 2019
- Here its clearly explained detailed design of two way slab simply supported corners free to lift, the design is according to limit state design of IS 456-2000, all codal specifications are followed and have shown checks, and also explained what to do and when slab do not satisfy check for deflection.
ONE WAY SLAB DESIGN : • How to Design one way ...
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#designoftwowayslab #designofslab
Words are less to thank you sir for sharing knowledge plus for brilliantly explaining each & every step in detail ! Thanks alot for taking this much pain for us - eagerly in wait to learn from you about strap footings, watertank design & ramp slab plus sloping slab design ! Just following your lectures
Thank you so much Najam, this appreciation is very special for me and this motivates me to come up with more videos, thanks a lot
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Very clearly explained. I never understood with this clearity during my college days. Thank you sir🙏🙏
You're most welcome, thanks for appreciating, keep supporting us by watching and sharing
What a explanation Sir, We love the video on Designing 2-Way Slab. Love from Karachi, Pakistan.
Very useful for our exam. Thank you Sir❤️
thank you sir for your teaching
i will never get confused in design again
i hope to get more teachings from you
BIG UP SIR!!!!!!
So nice of you, i am happy my videos are helpful for you, keep watching and sharing and stay tuned for more videos
Respected sir, thanks a lot for spending your valuable time for us, and also thanks a lot for your valuable design aspect for two way slab.
This is pure gold sir.thank you for detailed explaination.hoping for more videos like these on other topics.
Thank you so much for this appreciation, yes i will be coming up with more detailed videos, keep watching, keep supporting
@@structuralanalysisanddesign z.
Thankyou sir.ur teaching is awesome.cant explain in words
sir your videos are really very helpful and you explain as per is code only that is the best thing...you are one of the best tutor we have got on youtube...thanks a lot
Thanks Rahul for the excellent words for me, your words are source of motivation and driving force to come up with lots of videos with simplicity
Great video sir!! Thanks a ton for the detailed explanation
I'm half way in the video and I'm so happy that everything is so clear, like from the reference clauses, how you SHOW where it is, and how you SHOW interpolation is done and give references to missing information and the writing is also very legible, :'D, thank you for this!
I am Glad it was helpful for you, your happiness and satisfaction gives boost for me to do more videos, thank you for the appreciation, keep watching and supporting and share with your friends
Nice and clear thank u
Thanks you..so much sir .
I am speechless,,mind blowing explanation
Big fan of you sir after seeing this lacture
Thank you very much sir 🙏🙏🙏🙏
So nice of you for appreciating, keep supporting and keep watching, all the best
Thank you so much sir for showing interpolation method
Crystal clear explanation!!!
Thank you so much, keep watching and sharing
You are so genius & it's nicely presented. Keep it up!
Thank you so much! Keep watching and sharing
Very useful information sir. Thnx sir for acknowledging us 😀
So nice of you, thank you, keep watching and supporting
Thanks a lot sir for such detailed explanation 🙏
Most welcome, i am happy this video is helpful to you, all the best, keep watching and keep sharing
Sir this channel is great and easy 👌 understanding......
Thanks and welcome, keep watching and sharing
thank u so much for sharing ur knowledge
So nice of you, happy to share, keep watching and supporting
Excellent video.
Excellent sir, thanks a lot
Most welcome, all the best, keep supporting
Thank you sir. Good information ❤
Welcome, keep watching and supporting
Aapka bhut dhanyavaad sir, Aapko mera shat shat naman!
mere video se aapka doubt clear hua iske liye mujhe bahut khushi hai, all the very best
Tq so much sir this has helped me alot
You are most welcome, i am happy it helped you, all the best, keep watching and sharing
I have done complete RCC from this channel.
I am happy my videos helped you to learn RCC, coming up with more designs
Thanks a lot sir this helped me a lot
Glad to hear that, all the best, keep watching and sharing
Thank you so much sir😍
Most welcome, all the best
Thank you sir
Super sir exlent explanation
Thank you so much, all the best
Nice explanation.... 👍👍👍 Make more vdos...on each building members & RCC frame Analysis & design
Thank you, and i will try my best to come up with more videos
Just awesome
Thank you so much, keep watching, all the best
you explain clearly in each and every step ,i clear all my doubt i following your lecture videos only..sir will do same as one way slab for development length calculation.....thank you so much
Thank you so much Bipin, your trust is channel's pride, coming with more videos, keep watching and share with your friends
I am learning a lot from your channel, I hope I learn more. You can also inform us about the building structure design. I hope you can design an entire building structure so that we can learn building design completely. Thanks Dear #abhijeet sir
I am happy that my channel is helping you to learn the concepts, this is our motto of our channel, entire design is difficult to show but you can use these basic concepts to design an entire building, but will accept your suggestion
thank u sir😊
Just your videos before the exam day gives more than pass marks sir😂,thank you a lot
All the best, I am happy that you will pass the exam, keep sharing and supporting
I've no word for such a great effort of urs in all video , u give best explanination such that no any doubt left . thanks a lot sir ji👌👌👍👍👍BUT YOU MADE A MISTAKE AT 48:02 in calculation of Pt , % area of steel is calculated at support so you should take half of Ast as alternate bars are bent up near the support
Sir I like your video plz clarify about the effective depth
Thanks for liking the video, what exactly is your doubt?
No doubt your projection of teaching is awesome, but i would like to request you to end your class with design drawing (even your one way slab class). It will be like sweet after dinner.
Thanks
Great suggestion! definitely i will provide drawings for the next rcc videos
Nice video sir...please provide video on fixed and cantilever condition also...
Sure 👍 will come up with it soon
Thanks sir
Welcome, all the best
Sir, Thank you so much for your 1 way slab & 2 way slab. But kindly share the reinforcement detailing sketch. Then only the design understand completely.
Super super
plz make video on Reinforcement detailing in slab
Sir pls make a video on Working Stess Method...... 🙏🏻🙏🏻🙏🏻🙏🏻pls sir make as early as possible sir......
Sorry we are not making videos on working stress method
Please upload design for continuous beam or continuous slab waiting for this video . Thnks #abhijeet sir
Thank you sonu, soon i will come up with this, stay tuned
Sir what about slab restrained on corners do we need to go for torsion too in this case
Osm
Sir please also teach us how to use a scientific calculator for solving equations in designing
Sir! in practical conditions i think generally we need to design two way slabs in as restrained slabs but what about one way slabs and if we want to design one way restrained slab what is procedure?
Can u plz explain about moment coeff when three edges continuous and short edge discontinous?itx not in the table?
Sir plzz explain about types of foundations and footings sir plzz
Please explain Continous slab design with detailed reinforcement
Request noted, soon i will come up with it
After calculation of My and Mx in step.5. can you help me from where depth to resist moment came from code.
Sir, pls make a video on One Way Continuous Slab.
In coming days it will be uploaded, thank you for watching
How the reinforcement are placed in the corners and beam slab interface?
sir please provide us with detailed reinforcement arrangement because it is incomplete without detailed reinforcement .
yes dear, soon i am coming up with separate detailing videos
36:47 (Ast)y And (Ast)x Formula Is Not Present In IS 456-2000
We Have Remember that Or Else
Please Reply😌
Sir please make video on flat slab
Will definitely try
Sir why not we go with span to effective depth ratio mention on pg no 39 of Is code 456:2000 and in both the cases We see that deflection check is done but why not we follow the Annex C for checking the deflection ? Kindly reply me because I want to clear my doubt as soon as possible.
Each and every step is clear.., but sir I couldn't find the Ast calculation formula from where it has been arrived Sir. Could you please explain it Sir...
Its a simplified formula, any standard text book if you refer you will get it
Plz make videos with full discriptoin long duration
Hi Sir,
Excellent class. Have to ask you about Step one where in IS 456:2000 page 37 was made as a reference from your end however there is a note in Page 39 clause 24.1 of IS 456:2000 stating for solid slabs as :
NOTES
For two-way slabs of shorter spans(up to 3m) with mild
steel reinforcement, the span to overall depth ratios given
below may generally be assumed to satisfy vertical
deflection limits for loading class up to 3 kN/m square•
Simply supported slabs 35
Continuous slabs 40
For high strength deformed bars of grade Fe415, the values
given above should be multiplied by 0.8
in this lecture class the span length is more than 3m hence, will this be the case to be considered or what ???
Expecting your reply as im studying through virtual classes about slab designing
it is 3.5m in code book
Sir,in load calculation the units are KN/m but you took KN/m2
It is slab that is why it has been shown KN/m2
How to find the modification factor from that graph if fs=120 and pt=0.3. i cannot plot the corresponding modification factor value since its going out of the graph
should ast in shorter span be more than longer span always?
Design of 02 way slab is explained elaborately with required codal provisions, however it is not understood why factored load/moment is not taken into account in the design.
Because it is limit state design where highest factor that can be considered is 1.5 as per IS code
An RCC column is to be provided in a building to carry an axial load is 1200 kN .Design the column assuming emin < 0.05D usingM20 and Fe415steel .
How to solve it ?? Please help
Sir, While calculating Load calculation u took per mtr width so Final unit should be kN/m & not kN/m2.
it must kn/m, in that case how kn/m2 is added with kn/m????? sir please check it.
Also use British standards method for calculating moments
Thank you for the suggestion, will consider this but it will take time
10q how can we analys when partition wall load is added to the slab!!
How to analysis and design two way slab with openings?
how much depth should we reduce so that the required depth > depth provided?
You should detailed draw for rft every design after
Yes Vijay, i am giving details for the new videos
All About Structural Analysis and Design can i have your mail id
Just started working in Design consultancy. My all doubts got cleared before I start using softwares. Thank you sir 🙌🏻🙏
All the best for your future, keep watching and sharing
Sir Upload Two Way Continuous slab
Sure will upload, keep watching
Sir,
I have redesigned the slab with decrease the dia of bars to 6mm and increasing number of bars..
And the deflection get controlled..
And also decrease the spacing to 100 mm.
Is it better than increasing the thickness of slab?
Nice attempt to understand the concept
Different designers have different techniques to design
in the bending moment formula, why are both equations a function of Lx?
Yes kindly refer IS 456-2000
While calculating small ast you assumed 8mm dia bars ... can we take 10mm bars insted 8mm?
Pls ..reply sir
You can take, depends on moment how much we get, 6, 8, 10, 12 we can use
Sir structure ke uper jo load ata hai kaise nikalte hai and seismic and wind ku nahi consider karte ho aap jab slab and beam design karte ho tab aur sab load kaise calculate kare
Seismic load ka analysis alag hota hai
Sir since we took dx as 120 instead of 200, the slab failed in deflection then why did we reduce dx ?Still not clear sir. If we had taken 200 mm as dx then it would not have failed.
Am i right sir?
After fail in deflection than after I am takeing effective depth value 200 mm than its after calculation we found the value for astx and asty is 265.26 or 182.74 mm2 so its value is less than ast (min) = 276 mm2 than according to design criteria its not ok . Than what will do next step. Please
If you are getting both Ast less than Ast min than you have to provide Ast min as your reinforcement
@@structuralanalysisanddesign thnks sir
👍
Sir, why did u not use the L/d ratio for slabs given in page 39, which is 35 for simply supported slabs?
Hello Kabita, in one of the comments of the same video i have clarified this doubt, but once again i will tell, on page no. 39 it is said we can take those values if shorter span is upto 3.5m but where as in this problem shorter span is 4m so i have not taken that, i hope this clarified your doubt
@@structuralanalysisanddesign Thank you so much sir, could you tell me which value I should take if the dimensions are 3m * 5m? Here only one side span is less than 3 so little confused.
Also, sir could you tell us how we can do the shear check for continuous slab?
If its upto 3.5m you can choose P 39 value, yes i am planning design of one way continuous slab
@@structuralanalysisanddesign okay sir, Thank you so much. Your videos are very helpful ❤️
At 29:40 we calculated required effective depth and it was 71mm. so how does it fail for deflection
i did not understand one thing --- why didn't you take MODIFICATION FACTOR while calculating effective depth of slab .
is there any particular reason for skipping on M.F ?
What is the Lx/d ratio for Discontinuous slab
Hello Sir, I'm Vivek Katkar from Maharashtra..
If we take d = 120mm then the basic value of L/d ratio comes out to be 33 whereas in IS Code, the value should not be more than 20 for Simply Supported Slab..
If we take L/d ratio as 20, then d=200mm. But the criteria of Minimum reinforcement of 0.12% does not get satisfied for d=200 mm.
Therefore, the problem remains unsolved..
Please Guide...
Yaa you are right help me out plzz......
Same problem with me
Sir how to redesign this slab from step no. 2?
should'nt dx be 116 in step 6?
Sir is 456 me page 39 par two slab ki depth nikalne ke lx/35 ka use karne ka likha hai
Hello technical loot, you are absolutely correct, but if you read it carefully it has been mentioned on page 39 of IS 456-2000 that for shorter spans upto 3.5 meters with mild reinforcement ie Fe250 and we have to multiply by 0.8 if we use HYSD ie Fe 415 and 500, but in this problem short span itself is 4m that is why i have not taken page 39 value, i hope this clarification solves your doubt, thanks for watching and keep supporting
@@structuralanalysisanddesign ok sir its clear but in my book two slab question has dimensions of 5×5m so here is shorter span also 5m but they use span/35 to find out the value of d
they use, but code clause is like that, atlast if all checks are satisfied than go ahead with that no problem
@@structuralanalysisanddesign ok sir
@@structuralanalysisanddesign some people in youtube for calculating depth they are using formula l/d =MF *20 but why sir . In code not mentioned for multiplication by MF please clear my doubt.
Sir, why didn't u use Modification factor?
can we use the Ast formula as given by you in the videos in our college exams?
or should we resort to pg.96 formula?
There should not be any problem but i advise you to consult your teacher who has taken this subject and clarify
BUT YOU MADE A MISTAKE AT 48:02 in calculation of Pt , % area of steel is calculated at support so you should take half of Ast as alternate bars are bent up near the support. also you didn't multiply the tau value with k for solid slab
Sir should we take effective depth 200 mm???
+1
Sir why are we multiplying 1.5 to W to get Wu. Is 1.5 factor of safety of something?
It is factor of safety (FoS) i will try to make detail video on factor of safety
@@structuralanalysisanddesign ok sir
What about negative bending moments?
I think negative bending moments in continuous slabs
8:20 span depth ratio is wrong correct value is 35*conditions applied* given in pg39 of IS-456-200.
Please I need the other methods.
What if don't decrease the d from 200to 120 sir
Sir,
How do we make sure that our slabs are simply supported or fixed at corners?
This is type 1 two way slab ,where corners are not held down. This type of slab is for single storeyed building where supporting walls or beams don't provide fixidity.
No mesh reinforcement at the corners.