At 12:00 .......Sir u have used effective depth But In lesson 18 Of NPTEL For one way slabs in a numerical they have used the Total depth ....please get me out of this problem......
@@EverythingCivil Thanku sir I appreciate ur hard work I have a doubt on ductile detailing of a beam . I calculated all the reinforcement that is required in a continuous beam including longitudinal r/f and shear r/f asnper the IS 13920 . But I can't visualize the r/f and I can't draw the detaling of beam at a section ...please help me or if it is possible please make a lecture on designing and detailing of a continuous beam Thanku sir again
Megha Puri Lo value is the length available from centre of end support to the face of the support. So generally Lo= ( half the with of support - clear side cover) hope this helps
@@POOJAKUMARI-tf4xe Generally (5" thick slab) we provide beam to control deflection in slab or break span into 2 parts (eg:7m x 5m in this case we provide beam and now span is 3.5m x 5m ). In case (7m x 5m) slab will prone to deflection we must have to check the deflection.
Here spacing of main bars is 185 mm c/c at mid but if we bent up bars at support the spacing is 2* 185=370 mm b/w main bars which is more than 300 mm . so it does not follow spacing criteria .Justify Pls?
You are right. But its does not have to be like that we need the required area of steel and spacing at midspan. However, the requirement of steel reduces at support as bending moment at support reduces. therefore the code allows us to take only 50% of the total mid span steel into the supports and therefore the spacing doubles. the maximum spacing criteria you are telling about is for midspan.
Hi , Nice work there brother thanks a lot first of all. Coming to query , can you please make a video for slabs and beams for detailings of simply supported and continuous patterns as per IS 34 and IS 64 for calculation of top and bottom steel and in mid spans or so. like L/3, L/4 lengths to be provided.
No it's not a guess based on Ast provided find pt% and using that and fst value choose right curve from the grAph and find MF . Put that MF in span/depth formula and calculate depth which should be greater than depth that you have provided
Initially you have to fix the depth (for beams or for slabs) for that purpose you have to assume a value of M.F which is actually based in the pt%. Generally we take MF higher for slabs around 1.4 to 1.5, while for beams we keep it lower around 1.2-1.3. Its very obvious if you take MF higher for your design you are providing higher pt% and hence your depth reduces and tension carrying capacity is increased. Hope it helps.
Thanks for watching. Please check out SINGLY REINFORCED BEAM :ua-cam.com/video/r4sypwFUN7k/v-deo.html DOUBLY REINFORCED BEAM : ua-cam.com/video/MjlaVH7q6hA/v-deo.html COLUMN DESIGN : ua-cam.com/video/y9LI6x0GY5Q/v-deo.html Two way slabs and flat slabs will be uploaded soon.
Cantilever 7 Simply supported 20 Continuous 26 These are l/d ratio for beams... Can we use same ratio for slabs???? If yes than ratio of span /overall depth S.s. = 35 Continuous =40 is used where ???
Sir please tell how did u take Ast provided = 402.16 while checking for deflection ? It's no where in the whole solution Please tell me as soon as possible..I have exam tomorrow
It is basically length available from centre of support to the edge of the support minus the side cover. It shows that you cannot extend your bar beyond lo from that you have to bend the bar downwards or upwards.
In deflection check of both one-way and two-way slab, why percentage of steel is taken only for main reinforcement by ignoring addition of steel percentage of distribution? Reference [IS:456 2000, or any valid book following the IS Codes] >>> ANSWER WILL BE HIGHLY APPRECIATED
Please check for your values before uploading your Videos, for example, pt% value, and there were mistakes in other videos too. Please keep a note of it.
spacing in dist. bar is 335 then why in diag. it is taken as 300 ?
Nyc way of giving info
Thankyou sir ....to the point explanation
Thankyou Sir .This video was so helpful
I am not understanding why.....? The same velue provided in fs for AST ...😟😟
Very clear explanation
How do you place development length in the slab?
THANKS TO YOU BROTHER ..... FOR YOUR TIME AND EFFORT.
Thanks for watching
At 12:00 .......Sir u have used effective depth But In lesson 18 Of NPTEL For one way slabs in a numerical they have used the Total depth ....please get me out of this problem......
Yes it should be total depth.
@@EverythingCivil Thanku sir I appreciate ur hard work
I have a doubt on ductile detailing of a beam . I calculated all the reinforcement that is required in a continuous beam including longitudinal r/f and shear r/f asnper the IS 13920 .
But I can't visualize the r/f and I can't draw the detaling of beam at a section ...please help me or if it is possible please make a lecture on designing and detailing of a continuous beam
Thanku sir again
Thank u sir ... 😀 really loved the way u explained..
Vu< Ꞇc, thats the simple check for shear. Instead of calculating K Ꞇc.
But is code suggests that Tc taken for design is actually bit less than Tc for more safety standards...for slab
Thanks for sharing. Explained very well.
Glad it was helpful!
Instead of checking the depth can we not directly calculate the depth assuming that Ast req.= Ast given hence fs won't change.
Super sir 👍👍👍👍👍
Sir post a video on combined footing....
u r explanation is pretty good..n by u r videos we have learnt the usage of code book....
But pt% value doesn't come as 0.19% when calculated.. Please explain
It will come bro..,......just check again
@@civi12132 this is come0.32%
Yes
It's. 32
This videos are excellent.
thank u so much bro
got clarity to many doubts with ur explanation
How to find bent up bar angle and how much distance we provide it from the support
How to calculate the value of bent up
Can u tell me more?
@@EverythingCivil ??
Lol
Oo so good bro
BBB
Ooo
Sir, Ast distb. Steel mei hum effective depth nhi lata hai overall depth lata hai
Best video
which ast value you took for fy and pt% calculation
For distribution bar, BD is used as cross - sectional area I think
Sir for bending movement you took value of L as 3.125 Where as for finding shear for you took value of L as 3. Doubt in this pls explain
3.125 is effective span calculated
in shear check permissible shear force is calculated with length 3m instead of effective length 3.125m.
Can u plese tell about check of development length bcz i dont know how u took L○ value or we have to check wether Lo value is less than Ld
Megha Puri Lo value is the length available from centre of end support to the face of the support. So generally Lo= ( half the with of support - clear side cover) hope this helps
Wo sb to thk hai pr kaisay pta chlay ga ki kitne MM ka reinforcement use krna hai
You can use any bars as per ur requirement
how do u calculate 20.18x10^3 in development length..plz help
How did reinforemnet placed in middle section... In the last line of lecture ....
From where did u write value of Ast required and provided??
What fs line should I take if the fs value is 200, for finding MF
Sir shar force is 20.81 in Ld calculation put 20.18 why ....
Is there a different criteria for deflection check on beams and slabs??
No they both are same.
Osssom brother how nice to teach
Please make more video on stair column
Stair column?
Sir,please make a video regarding design of inverted t beam foundation for g+ 1 residential buildings.thanks
%p calculation mistake ...its come 0.32
U r right but still both values 0.32 and 0.19 are lies in same mf graph
how bro
The 0.1lx using lx value effective lx or normal lx = 3000 ah?...
Thank you sir it's very helpful for me
why is 3.125m effective length shown as c/c distance between the supports? while c/c distance between the supports is 3.3m not 3.125.
Please refer Cl 22.2 a of IS 456 pg 34. It will clear your doubt.
Thanks bro
Tomorrow I have exam
This lecture uses me a lot
I'm glad it was helpful to you ☺️
U r gud english
Sir can u please tell how did u get the value or area of steel required?
For delflection criteria can we also check by span/350??????
That formula is for steel structures.
@@EverythingCivil in case of steel structure deflection criteria is span/360 for S.S
For cantilever span/180
Sir most of the book..the effective span is directly calculated by span/25 its correct
Was it the eff depth? d=span /25. ??????
@@ananyapandey6886 yess i mean to say sir
@@ananyapandey6886 actually its real formula is span / modifications factor x base value
For shear check for pt% which ast is to be used req or prov
Please solve another question of one way slab . I loved it.
What checks comes under servicibality check ? Please answer sir
Check for deflection.
@@EverythingCivil thank you sir
Sir bent up bars kitne length pr bent karte hai
Apne last figure me 0.1L liya hai
It depends upon various design characteristics. Mostly it is adopted in between L/7 to L/10
Placing for mainbar shorterspan or longer span
Shorter always
in deflection check d=span/(20*M.F) where 20 is for simply supported , for fixed slab what this value is to be ??
In case of fixed slab the deflection is negligible , hence there is no need of checking deflection in fixed slab
@@POOJAKUMARI-tf4xe Generally (5" thick slab) we provide beam to control deflection in slab or break span into 2 parts (eg:7m x 5m in this case we provide beam and now span is 3.5m x 5m ). In case (7m x 5m) slab will prone to deflection we must have to check the deflection.
Can u draw that fully with explanation that this value is taken from it etc . ??
how u get shear force is 20x10^3
Sir,
Lo ki value kya rakhi in Development Length Check Case. Please Explain!!!
very well explained sir.
Here spacing of main bars is 185 mm c/c at mid but if we bent up bars at support the spacing is 2* 185=370 mm b/w main bars which is more than 300 mm . so it does not follow spacing criteria .Justify Pls?
You are right. But its does not have to be like that we need the required area of steel and spacing at midspan. However, the requirement of steel reduces at support as bending moment at support reduces. therefore the code allows us to take only 50% of the total mid span steel into the supports and therefore the spacing doubles. the maximum spacing criteria you are telling about is for midspan.
Very nice
Hi , Nice work there brother thanks a lot first of all. Coming to query , can you please make a video for slabs and beams for detailings of simply supported and continuous patterns as per IS 34 and IS 64 for calculation of top and bottom steel and in mid spans or so. like L/3, L/4 lengths to be provided.
Hii i have one question
When you give a check to deflection u used Ast required to ast provided ratio......
# This is Ast x or Ast y .?
Same doubt bhai...
Pata chala kya liye hai sir ne...?
Thank you 🙏
Thanks sir 🙏🙏🙏
Make video on detailing of slab
How to calculate critical shear in slab Vcr dude
Calculate at distace d(effective depth) from the face of the supports.
@everything civil can you do the checks for two way slab as well.
It is quite similar to one way slabs. Its self explanatory. But ill try to make a video definitely.
What to do if Development check does not satisfy
Modification Factor caluclated by you is a
Simple guess
Or
is there any formula for it
?????
No it's not a guess based on Ast provided find pt% and using that and fst value choose right curve from the grAph and find MF . Put that MF in span/depth formula and calculate depth which should be greater than depth that you have provided
Initially you have to fix the depth (for beams or for slabs) for that purpose you have to assume a value of M.F which is actually based in the pt%. Generally we take MF higher for slabs around 1.4 to 1.5, while for beams we keep it lower around 1.2-1.3. Its very obvious if you take MF higher for your design you are providing higher pt% and hence your depth reduces and tension carrying capacity is increased. Hope it helps.
how to find bend bar length
Nice explanation with clause number ( in detail) , please explain design of 1) Beam 2) Column 3) two way slab and 4) Flat slab
Thanks for watching. Please check out
SINGLY REINFORCED BEAM :ua-cam.com/video/r4sypwFUN7k/v-deo.html
DOUBLY REINFORCED BEAM : ua-cam.com/video/MjlaVH7q6hA/v-deo.html
COLUMN DESIGN : ua-cam.com/video/y9LI6x0GY5Q/v-deo.html
Two way slabs and flat slabs will be uploaded soon.
@@EverythingCivil
Okk
superb
Cantilever 7
Simply supported 20
Continuous 26
These are l/d ratio for beams... Can we use same ratio for slabs????
If yes than ratio of span /overall depth
S.s. = 35
Continuous =40 is used where ???
Than why do we use these different parameters....
Where have u seen 35 and 40? 7, 20 and 26 are actually basic values not l/d ratio.
Is 456. 2000
Page 39
24.1.2
It's extra notes given in addition to clause 23.2 also 35 and 40 is for loads up to 3kn/m² only.
What value you took for lo?????
Sir how to draw C/S of slab
Can you explain about finding Lo in develpoment check ??
Please watch this video from 25:40
Video link : ua-cam.com/video/hCFeXnmigjM/v-deo.html
Sir...please show the calculation of lo also in detail
Lo is length available from centre of support to the edge of the support minus the clear cover.
.i have equstion. Can u help me ???
is it necessary to draw fig atlast ii eaxmination
Yes it carries marks.
make a video on cantilever slab with concentrated load
Sir please tell how did u take Ast provided = 402.16 while checking for deflection ? It's no where in the whole solution
Please tell me as soon as possible..I have exam tomorrow
From part1 @ calculation of steel
what is lo in development check
It is basically length available from centre of support to the edge of the support minus the side cover. It shows that you cannot extend your bar beyond lo from that you have to bend the bar downwards or upwards.
There’s problem in pt% you calculate it will not come 0.19%
Bro tow v ,tow c greater or less. That part i am not learn . Plz xplain that
Thanks sir
Sir in the fig u have given that the length of bend up bar from the centre of support is 0.14
Can u pls explain me that sir
Its the curtailment rule. You can bend the bars at a distance of 0.1L from the centre of support. where L=span
Thanku
In deflection check of both one-way and two-way slab, why percentage of steel is taken only for main reinforcement by ignoring addition of steel percentage of distribution? Reference [IS:456 2000, or any valid book following the IS Codes] >>> ANSWER WILL BE HIGHLY APPRECIATED
Sir steel ka lactures bhi upload karo
Yes. Steel series will start when the next semester begins i.e in june. You can tell me on what topic you want video?
👌👌👌👌
L0 kya hai
Nice thanks
60% will be 0.6 But u have taken 1.6 why??
60%extra
Thank you so much
Your answer for %p is wrong.. it should be 0.32%
Asalem cheppavra nekina ardhamindha
Check for deflection
you didnt explan if failure occurs what we have to change in design to over come the failure bcz i got failure in shear *SAD
If shear failure happens you can increase the dia of shear steel.
Pt calculated comes out to be . 32%
Please soil check video dalo sir
For check u take overall depth ,rather than effective
Please check for your values before uploading your Videos, for example, pt% value, and there were mistakes in other videos too. Please keep a note of it.
Spacing is not according to drawing
its because we tend to provide maximum spacing not more than 300 mm at site. even if it is a distribution bar
Abe Lo ki value likhe bina hi check kr diyaa