DESIGN OF TWO WAY SLABS | IS 456 | Limit State Method | Mumbai University

[@vijaykant007]

There is error in load calculation for per meter

[@EverythingCivil]

Can u tell me more about it? Thanks.

[@vijaykant007]

In load calculation step, for calculation for load per meter it will be multiplied by one meter with total load but you divided.

[@EverythingCivil]

Yes you got the point correct thanks that's an error. Will pin down your comment so that others can see.

[@shabajkhan1916]

How did you take aspects ratio?

[@divyanshdeep3941]

@@civilshorts13754 bhaang khaye ho kya.. l(y)/l(x) hota hai

[@anirudhkorgaonkar941]

NO intro NO background music NO glamour just PURE skill and knowledge of teaching thank you sir have a good day

[@sahilarora5983]

YOU TEACH VERY WELL BRO....KEEP IT UP ! GOD BLESS U

[@EverythingCivil]

Thank u so much. Pls share with ur friends.

[@jp4mahajan]

Very good example to explain two way simply supported slab ,thanks for your effort.

[@mebinglapung3405]

Your teaching is just awesome...I hope you upload more of the videos regarding civil engineering subjects

[@sunilgohel8504]

Excellent explanation sir. All your videos are worth seeing

[@arishfurkhan3911]

thanks bro....you helped me to pass exam after a long time....awww bhai shukriyaa🤗❤

[@jp4mahajan]

Two way simply supported slab explained in a very nice manner. Thanks and keep it up.

[@EverythingCivil]

Thanks dear. Keep supporting ❤️

[@paarthsharma15]

very well explained . Concept and language fluency is really good. May god Bless you with loads of happiness and good fortune ahead. all the best.

[@EverythingCivil]

Thanks for watching.

[@ashutoshcheke7547]

@@EverythingCivil how did you calculate aspect ration

[@EverythingCivil]

@@ashutoshcheke7547 aspect ratio is longer side/shorter side of slab. ly/lx Can u pls tell what you want to know?

[@kajalnimgade]

Thanks sir 😊😊😊i hope we get 20marks on that ques. 😀

[@mrkalyan2070]

Kajal nimgade only 14 marks per answer😅

[@suryapraveen7381]

hi

[@amanprince2009]

Thanks u.very clearly u have explained all things.👍

[@V4Angels]

What about BM COEFF for 4 sides with torsion provision T-26? You took COEFF from T-27 why? What aboutmiddle strip calculation, can you tell? In depth calculation, span to depth is 28 for SS and 32 for Fixed or continuous. If we consider 20x1.5=30 does it satisfy that condition? And, why you multiple with MF as 1.5? It's not for FOS.. Overall nice explanations glad to hear in reply with above answers from asap . Thank you.

[@jayasingh3233]

LX + half of width of support is taken in calculating if it is not given we assume the width of support

[@sanjayborge2240]

sir I didnt understand in the shorter span the distance 467mm from the support , where this come from?and why please explain .thank you and regards.

[@Obsoluite]

5:00 - what about "Floor Finish Load" ? And Why take Depth of slab : 0.2 m By IS code : Depth of slab is 0.125

[@ajinkyakshirsagar1691]

Very sincere efforts... Nice job bro... Keep it up!

[@EverythingCivil]

Thanks

[@naveenmeena3184]

Thanx buddy ...you made things easier ...

[@saradakonuri5746]

sir please draw and explain reinforcement details. I can't understand and where you get the 280mm spacing.

[@balaspeaks1584]

You are great teacher brother ❤

[@Vikas-kf5ys]

At 7:30 duration the αx and αy values is not get by Interplotation ?

[@revanthmunagala3905]

moment at x direction is 48.68..but @ 10:05 u have taken it as 46.68....

[@jakishsheikh949]

Well simplified brother, CHEERS from NITM

[@abhishekganoil8011]

Pretty neat explanation. Keep up

[@amrendshah5094]

good explanation sir. please upload one complete residential building design video.

[@relaxgamer_Chris]

AT 13.28 while calculating eff.depth in y direction how come you are taking 6mm for the rod in x direction its 12mm rod for y direction 6mm its of half of the rod. i think you need to take 200-25-12-6 = 157mm. please explain.

[@michaelnibret9446]

thank you sir it is very clear explanation ,but can you also explain about the techniques how to distribute the moment on the two way slab, on column strips and middle strips?

[@sankaranandh.R]

Really well explained.👌👌👍

[@SunDrops2730]

Span/depth ratio jo apne bataya wo beam ka h ya slab ka? Beam ka alag hota h n slab ka alag hota as per code.

[@Nitesh_Stock]

Excellent man.. well explained.

[@akshayverma1828]

shouldn't depht in case of y be 157 mm? because you subtracted the radius and i guess dia should have been subtracted

[@avinashprasad3755]

Bro, Kay slab ko 3/4 mid span me Nahi divide karoge ,why pls explain

[@nuthakkinageshbabu2743]

Simply supported on all four edges with held this is the condition... Which values are taken sir

[@pankajbhoyar9207]

Very good brother 🤗 all'the best

[@civilengineeringbasic]

Hello sir I have a slab area of 12'*12' . And while comparing from structural drawing I got less reinforcement as compare to then. Why it is so..... Can you explain me

[@AmitKumar-yt8kv]

Sir, your method of teaching is so impressive, and thax for this, but how to get 800 of Ast because you chose wrong value 46.68 , pls confirm

[@sonukumar-bp4wb]

Yes wrong calculation

[@mshippergi6109]

how to provide edge stirrups ( l/8 ratio) ?

[@parasbambah4770]

Please tell me about minimum dia of bars to be provided in slabs,beams,columns ( means not less than that)

[@EverythingCivil]

Minimum diameters Slab - 8mm Beams - 10 mm Columns - 12 mm Thanks for watching

[@parasbambah4770]

Everything Civil Thanks

[@richieerich_]

I have one doubt.....at 13.32 u have written ( 200 - 25 - 6 - 6 ) don't u think one of them should be 12 becoz it's the diameter of bar we're taking??

[@richieerich_]

One more thing.....while calculating the value of total depth ( D = d.eff + d.cover + Dia of rod/2 ) but u haven't written the value of dia/2 ?? Could u please explain??

[@pankajbhoyar9207]

Plz have a session on design of retaining wall

[@jahangirkhan-rw6th]

While calculating Mx value you put effective length value ...But in formula it is Shorter span ...Correct me if i am wrong

[@NavjotSingh-qd2is]

Very nyc sr bt agr diagram v step se bnaate toh👌👌

[@psantoshkumar5858]

Good explained sir...

[@_SivavigneshNS]

actually the information are so good .

[@EverythingCivil]

I m glad you liked it.

[@hareeshmuthu5412]

At last for torsion the if the minimum spacing is 3d

[@nbasavaraj4439]

For slabs 12mm is heavy rod I think. Is it OK. For which purpose this type used.

[@shrikantdeshmukh6337]

It was the best explanation ever...great efforts taken by you But there is problem in calculation we calculated moment in X direction=48.68 And at the time of calculating steel we took 46.68?

[@EverythingCivil]

Yes I'm sorry for that error. I hope you understood the design step.

[@EverythingCivil]

You will have to interpolate bro.

[@shrikantdeshmukh6337]

@@EverythingCivil yes and i have followed same design steps in exam as well...thanx for the video

[@rabbaniubedullahkhan7667]

Can u tell me how the Ast formula u took??? Tell me the link of derivativion of Astx formula you used. Coz the Annexure G contains different formula for Ast

[@roydebraj0342]

Part 4 me moment nekale ke leya w=22.5 leya geya hai....but iska to total load hai 15kn/m ..22.5 kaha se ati ha ?

[@sulleymanmusah9349]

Please Sir, your lecture is very good. And if you can teach me two way continuous slab OK thank you

[@bhavirisettibhanukiran6467]

Nice boss&tq

[@shadabjagirdar15]

What about reinforcement in eedge stripup calclution??

[@jusrandom6025]

Why didn't you use table 26 for alpha x and alpha y calculation sir?

[@yaqubabidi3370]

Sir ,can you pls tell me how you calculated "d" in check for depth

[@gopalreddy5349]

For under reinforced sections the actual depth is greater than balanced depth

[@pankajdwivedi3009]

Some more steps like check for shear are not explained in this video

[@aamir.durrany]

Check for shear is generally not required

[@kodatisuryasomeswarrao6755]

in continuous slab panels, the reinforcing details over support of one side twoway slab and other side oneway slab of short span parallel to support. how redistribution of moment are to be done, there because longer span have zero moments (in oneway slab) except mimimum steel of 0.12%

[@ABHI-pg8wx]

Sir simply supported two way slab always provide torsion ah?...or not... On qn given na find torsion?...

[@cherithhurdaisirigiri5584]

Sir how did you get the value for calculation of steel on longer span as. 446 as i did in the calaulator im getiing a error so can you help me out on this

[@naveenprajapati1121]

In Question you have taken Fck M30 grade of concrete and you have taken M25 in checking for depth

[@bishowregmi7262]

Just wanna ask if a continuous slab has 1m cantilever slab at discontinue edge will it be interior slab or discontinue slab

[@sidtech3167]

Very well done solutions with proper explanation i would like to contact with u What's your name brother....i am preparing for competitive exam..make vdo on soil mechanics also please 🤗🤗🤗🤗

[@kickvenkatvenkat9978]

We have bend to upward in the LX and ly direction what is that length and how to find that length. Remaining else is very clear thank you.

[@EverythingCivil]

I can give u detailed drawing of the bending procedure. Please mail me at [e-mail]

[@Ahuja5886]

Hey bro...you have explained it very good..but how to provide Bent up bars....plz explain..

[@EverythingCivil]

Patel Jigar In beam or in slabs?

[@Ahuja5886]

Everything Civil ..bro...in slab..

[@EverythingCivil]

Sorry for the late reply! In slabs bent up bars are provided along the shorter span in case of one way slab and along both spans in case of two way slabs. Bent up bars are provided alternately and carried upto a distance of L(span)/3 into the next support.

[@sheelkumarjatav1310]

Ast in X dir is 800 mm2 Is this value is right according to the minimum reinforcement criteria for this slab ... Please cross check And explain...

[@wizardthil5533]

sir can u please tell how u got the formula of Ast ?

[@sachinrajeev44]

wizard thil bro did u find it? I am still searching

[@gebaete2597]

@@sachinrajeev44 Bro,the formula for finding out the area of steel is given in the Codebook (IS:456:2000). Page no-96.

[@tasaduqtahseen6458]

What about the Calculation of shear force And development length Plz reply

[@Liberty124...]

Very nice video.. Than you

[@faizahemad913]

basic value of l/d ratio for two way slab for simply supported is 35. you have considered 20 which is for one way slab...

[@utterlygood7034]

Hey can you explain how you have decided about slab that it is restrained or unrestrained..... As in question it is mentioned that monolithic construction is done so I think it would the case of torsionally restrained slab in which "all the four edges are discountinuous "I.e simply supported, this should be as per table 26 of is456:2000, case number 9....please tell me as soon as possible

[@aamir.durrany]

Simple. At any corner where either or both the edges are discontinuous, torsion reinforcement has to be provided. It has nothing to do with monolithic casting.

[@utterlygood7034]

@@aamir.durrany it is mention in question that the slab is simply supported from all tha 4 edges ... What does it mean.... Actually I am confused in unrestrained slab and restrained slab (case: 9 of IS 456:2000) in case 9 it is mentioned that when slab is simply supported from all edges(discontinuous)) If we designed it as restrained slab then we have to provide torsion r/f else not and coeff. Too are different

[@aamir.durrany]

@@utterlygood7034 A "Simply Supported Edge" means there's no other slab beyond that edge. Such edge is also called a "discontinuous edge". In the question it is mentioned that all 4 edges are simply supported (discontinuous). That means the slab is just one single slab as it is discontinuous beyond all of its 4 edges. Torsion bars, by default, need to be provided in those corners where either or both the edges meeting at that corner are discontinuous. (Unless they mention specially in question to treat the slab as Unrestrained, in that situation we won't provide torsion bars in any corner). In this example, all the corners satisfy the condition for torsion bars. Also the question didn't tell us to treat the slab as unrestrained. So we provide torsion bars in all corners. Now, the condition when Table 27 is used: Table 27 is used when 2 conditions are satisfied. It is used in only those cases where all the edges of that slab are discontinuous, AND torsional reinforcement is not required to be provided in any corner. For all the other cases we use table 26. The example in the question does not satisfy the 2nd condition for table 27. Had they mentioned to treat the slab as Unrestrained, the 2nd condition would then have been satisfied and we would have used table 27. But in this question, we will use table 26, case 9. He should have used table 26. Hope this helps.

[@utterlygood7034]

Yeah! The coeff should be as per 26 and not as per 27,Anyways Thank you very much!!

[@vkvijaymsamy]

if spacing of bars comes in decimal it should be round up to lesser number.example if spacing is 130.33mm it should be round up to 130 or less of that value as 125mm.

[@rajrishi7433]

In simply supported condition of two way slab i think there is no provision of providing torsional reinforcement..it is for the restrained condition when corners are held down???!!!????

[@deepakjha4087]

Hlo sir..u haven't shown calculation of ly...can u explain?? And without ly..how can u find the value of alpha x

[@vamsikrishkonidela8029]

sir what is design difference between one way and two way slab n design point of view

[@EverythingCivil]

Major difference is the way of bending..one way slab bends in only shorter direction hence main steel is provided on shorter span. In two way slabs bending takes place in both the direction hence steel is provided in both span.

[@izhar5914]

Hey. The shorter Spam which is Lx is 4.5m according to the question. In the solution, You are taking it as 4.675m. Can I know why?

[@aamir.durrany]

4.5 is the clear span and 4.675 is the effective span. We use effective span value in all calculations.

[@sakshamgupta129]

thankyou sir (

[@EverythingCivil]

No dear.

[@DeepakSingh-nr6mh]

Where is the formula of astx in is code

[@SARVAMSUPREMEFLOW]

Perfect💯👍👏

[@indradiptochatterjee2628]

you should consider bearing of 100-150mm in the beginning.

[@nagendrasingh9781]

Sir modification factor kaise lena hai MF lene ke kya criteria hai Sir please bataye

[@zoya1520]

Md k fomula v code me nhi mila ??? 8:48

[@pegionlover5484]

in the sum no need of torsion reinforcement and we take the bending moment value at table 26 page no is 91 as per code book , and in question monolithically all side simple supported so we take table 26

[@pegionlover5484]

replies fast

[@pegionlover5484]

please provide the check for depth

[@garvsaini9160]

Great video! But please explain how to calculate the number of bars required and total number of bars

[@EverythingCivil]

I have made a video on cutting length of slab. kzbin.info/www/bejne/e16zgaGZnNureK8

[@rexyadav5180]

If the edges are monolithically casted with beam that makes it a restrained slab.

[@riteshgurung430]

Sir, I am confused whether to to calculate deflection , shear, ld, distribution steel in two way slab ? should i need to check ! and please explain the length calculation as shown in figure for bentup bar Thank you sir for this vedio

[@EverythingCivil]

Yes you need to check for everything you mentioned.

[@Rajpoot_A.S]

Hey in the two-way slab where would provide distribution bars? as we provide in one-way slab.

[@aamir.durrany]

There's no distribution bars in 2 way slabs. All the bars are main bars.

[@ramg14]

How to design slab with openings..for shaft or air ventilation

[@JourneywithmeErDRLovevanshi]

Excellent.....

[@JourneywithmeErDRLovevanshi]

both one way and two way are too good thanku

[@shubhammajage6696]

can u explain how to find d in Ast y direction and next steps also

[@EverythingCivil]

shubham majage it's clearly explained at 12:25 please go through

[@muhammedsuhail7125]

thnx sir very nice and halpful video☺

[@EverythingCivil]

Muhammed Suhail Thanks for watching

[@aqireenzaqilah]

Is it a drop? How to calculate drop?

[@divakarg381]

Very good explanation

[@EverythingCivil]

Thank you so much. If you need more videos please let us know.

[@sateeshpotnuru7056]

in calculations we have taken b as 1000 mm means we are considering for 1 metre width ? please clarify

[@EverythingCivil]

Yes dear you are absolutely correct.

[@AbhishekKumar-de6kx]

Suppab bahoot achaa hy

[@vipinkushwah8937]

Nice explaination

[@jahangirkhan-rw6th]

Sir Kindly upload this video in FPs system as in Paksitan qe are using Foot inches system...

[@OnlineToBrain]

In total load calculation you got mistake. When you multiply then you will get Kn/m according to your arrangement it Kn/m3

[@praveenchary2519]

No mistake..it's 1 m lenth ...

[@praveenchary2519]

B is 1m,D is m.. density is KN/M3..now load will be kn/m

[@sweetrascal3980]

If you are design for two way slab then how can you take your basic value as 20. refer IS 456 page no.39, B.V is 35 for 2way slab and you need to multiple it with ratio of 0.8 because of using Fe415, for modification factor we have to refer SP16 page no.10 table E. Effective depth = span / (B.V × M.F × 0.8)

[@jassi7491]

Bro that is for spans upto 3.5m only. Above that u have to use as done in video

[@Buddies-td3rm]

How to draw the diagram of torsional pls tell me to complete torsional details pls .........

[@EverythingCivil]

Buddies 2018 in beams or slabs?

[@chinnac6389]

Bro , add design of water tank ( rectangular & circual ) and design of stair case , also

[@EverythingCivil]

Design of staircase problem. : kzbin.info/www/bejne/r5C1f35jYrmlbcU Water tank will be uploaded soon.

[@chinnac6389]

Sorry I mean , what was difference between deep well stair case , dog legged stair case & circular stair ( in design steps)

[@chinnac6389]

Which steps we have to use for different type of stair case

[@EverythingCivil]

This mehod is only applicable to staircases supported on rectangular slab such as dog legged staircase.

[@EverythingCivil]

Design of water tank added

[@allinoneindia961]

Sir i want to know what is effective span of a slab with figure and difference between simplysupported and continious slab with figure sir plz reply me soon

[@EverythingCivil]

sure will make next video on that.

[@bijansankardas]

Is it RCC