how to calculate steel quantity in beam - engineer boy- civil engineering
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- Опубліковано 24 тра 2018
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Hi Engineer Boy, you are the best. Only 2 Engineers teaching Civil Eng. on U tube gives the correct calculation for the bent portion of a crank bar. One don't need trig. calculations to know that a 45 degree triangle ratio is 1to 1 to the squareroot of 2 which is1.414 and not 0.414 ( 0.42 ).I am a Aircraft Mechanic building a 3 story house in Guyana, so i look for technical info. here, but i found that engineers have different standards. Iam confused where to place lap length on the bottom bar of a continuous beam, the same engineer gives an opposite answer at his next lecture. Thanks for correcting that 0.42d to 1.42d. Jagdeez Lal.
Excellent ❤👍
Thanks a lot professor. You are the best may Allah preserve you.
ameen......welcome dear... happy to see such a good comment
straight forward stuff. great video
Enjoy dear 💜💜💜
Uplod vedio on calculation the quntity of material in aquduct
all of your video helpful for us...thanks you.
welcome dear..
+Engineer Boy please give me retaining wall rod calculation video..... advance thanks
Your english is very good and abive this your teaching skilld are excellent keep uploading videos 🤗🤗
Thank you! 😃
very good explanation sir 👏
Thanks and welcome
good luck
The all dimension should be in same unite
How to calculate which nu of striuup rewuired
Good video...
thank you dear
Beautifully explained sir, please please could post plastering quantity survey
thank you, plastering quantity calculation is already been uploaded,
Hello there !! Are there topics on *Continuous & Cantilever Beam* ?
jnb ap ki tmam vedios bht helpfull hain
Ap bht clearly smjhaty hain
mjy mery mtlb ki har vedio yahan se hi milli
thank you for joining us... dira dira manana... mihrabaneee g
thank you for joining us... dira dira manana... mihrabaneee g
Ok
Hello, thank you for sharing the lecture. Is this calculation method suitable for longer beams? Is it suitable to make calculations for a 12meter long?
Yes you can use this method for any type of beam
Thanks for this video, really help full .
most welcome dear
Plz make vedio on calculations of material required for slab ( cement sand aggregate )
already available
Beam and frame k slope deflection method k tutorial upload krin plz
sultan academy accha video banao
What is the topic in reinforced concrete design the formula you use? Thank you for answers
i did not understand your question
Thank you sir
Welcome sir
@@EngineerBoyOfficial how can i contact you directly, I need your assistance ?
Check video description
What is the formula D²/162.162 stand for??
Why u use the formula D²/52.9??
Both formulas are used to work out steel bar weight in kg. D in above must be in mm where D in below must be in 1/8th of inch. Check the same playlist for derivation.
I think hook Should need to be *by 2*9d
9D is for both.
4.5D for one and 4.5D another one
So 9D for both.
Thats why i do not put 2 there.
Thank you for joining me.
how dia comes 6/8 ?
Sir Give me answer pls ......
I in has 8 sotar.
We divide by 8 the number of bar so 6/8.
For any number of bar to use in inches divide number of bar by 8 ,like for #3 diameter is 3/8
#4 is 4/8
#5 is 5/8
#6 is 6/8
For #8 is 8/8 that is 1inch
For #7 is 7/8 etc
So on
Number of bar repreasent dia of bar in sotars .#6 means 6 sotar .1"=8 sotar.
To convert sotar to inch divide by 8.
Assalam 0 alaikum sir g sanga yai
should the diameter is not divided by 8 during weight calculation ?
That formula has factor 52.09 that is to be used with number of bar.that gives kg/ft then multiplied with total lengh 4 total wt.
If u use 6/8 ,factor in denominator is changed.and weight obtained would b kg per inch.
There is also a table that u can google gives u weight per feet for specific dia of bar that u can multiply with total lenght 4 total wt.
For Cut length of bent up bars you calculate L/4 =10/4=2.5’
Here concrete cover is not deducted
So is it correct plz clerify me i am confused or it is L/4=10’-2*(1’’)/4
Concrete cover ignore krdia hai dear.. app ne ju bataya hai wo theek hai
is there it ll be also 9D for stirrup? is it not 2d?
this depends upon design... i have uploaded a separate video on this
@@EngineerBoyOfficial ohke
i did not understand the concept of (6/8)" diameter. please explain. can you release next video using metre as dimension?
Its simple dear... 6/8 inches means 0.75". Or if you see inches is divided into 8 parts known by soters.. so 6/8" means 6 soters diameter... remember diameter represents the size of bar...
Yes. Sure i will try to do videos in metric systems
Sir g da column ya da beem ringan ba sanga formula Sara raukhku
Video me uploaded kre da quantity survey playlist ke. Hagha check
Please tell me why I don't get 43.83 ft when I plug the same numbers... I am doing an assignment for structural mechanics and I am referencing from this video.
Can be two reasons.
1) you not following BDMAS,
2) my answer maybe wrong.
@@EngineerBoyOfficial I've used BODMAS but thank you.
Sir pluged some value in inches and some in feet .
Did not mentioned however conversion to feet in next step but he did actually directly.
And answer was obtained by all values in feet that is 43.83.
if the dia is 8 instead of 6 what will be 8/8" instead of 6/8" ? 8/8" wrog or currect
if dia is 8 then its 8/8 inches or 1 inche
There r two hooks so length of stirrups will increase!
9D was taken for both hooks
@@EngineerBoyOfficial it should be 2*9D,plz clarify
Students usually use mm
okay
What does the 52.9 in the formula represent?
Derivation to this formula is been uploaded , watch to discover your answer
@@EngineerBoyOfficial that doesnt help me. Where do i get that version? Can i het a link please? Because atm i dont see it
plz provide link of this video
Its free you can watch here on youtube
sir, you don't convert values in same unit.....
i do when its needed. where there is no need i do not,
W = (D^2/52.9) * L , where D is dia of bar which should be 6/8, then why did you write 6 ?
Here D must be in soters. Here 6 is ol
Why u use dsq/52.2
Its for ft
Is dsq/533 ....
Kindly clear this
proof and derivation of this formula is uploaded in the playlist of "quantity survey" please watch that
What is 6 by 8 inches
6 by 8 inches mean 6 divided by 8 inches
(6/8)^2
Main bar is answer wrong calculated
Interesting lecture. But the quantities are not super accurate.
hmm. thank you for comment. may i know how to make it super accurate?
@@EngineerBoyOfficial Dear we have to deduct the bents. 1D for 45 degree bend, 2D for 90 degree bend and so on. Some times it may cause problem during cutting of steel on site. If we dont deduct bents then some stirrups might be tight some might be lose. I know some surveryor s don't consider bends during their calculation which is ok but considering bends may prevent site engineer from a headache on site. Nur kho sir jee taso kha poye ge. Za kho staso shagird yam 😁
@@EngineerBoyOfficial Also the perimeter of the stirupps should be its centerline not its outerside. You calculate it upto outer face. Perameter should be 2(a+b) where a= width of beam- 2*Clear cover - 2*bar dia of stirupps bar. (To reach to the centre line). Same goes for "b". Then ofcourse we add hook length to it (12D is now a day prefer by structural designers instead of 9D) and then we have to deduct the bends. So we have 3 90 degree bends in stirrups, therefore we have to deduct 3(2D) from total cutting length of stirrup bar. We deduct bends because when steel is bend down it elongates at that bending point.
Here two hooks. But why we calculate one times only.
Why. 9(6/8)''
Why not 2*9(6/8)''.???
I have taken 9D for
Sir kindly first tell how to calculate no.of bars
Already uploaded
I STILL DONT UNDERSTAND WHY ITS 6/8 INCHES KINDLY EXPLAIN THIS OR TELL ME WHERE I NEED TO RESEARCH ON THIS. YOUR QUICKEST RESPONSE WILL BE APPRECIATED
Its easy, if i say its #3 bar that mean 3/8 inches,
If i say its #11 bar that means 11/8 inches.
6/8 inches is the diameter of rebar for #6 bar....
Thats number (3,11 and 6) represent the 3rd, 11th and 6th part of inche
you saying peet that is not peet its feet
yeah, thank you dear
stop over acting .. btw good lecture
Okay ok😂. Thank you for compliment dude 🥰💕
Can't understand any thing 😔😔😔😔🤯🤯🤯🤯🤯🤯
oops
kahe angrezi ki tang todte ho be?