How to find the size of column? | Design of column | Column size for residential house | Civil Tutor
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- Опубліковано 6 лют 2022
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clpsheldon.page.link/x3kb In this lecture, I have discussed briefly, how to find the size of column for a residential building?
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Whenever we need to construct a residential structure, the main things we need to focus on are the depth of the foundation and the size of the columns. If we don’t excavate the foundation to a sufficient depth or if we don’t provide the adequate size of the columns required for a particular number of stories, the structure would be prone to failure. Hence it becomes necessary to decide the size of columns as per the number of floors to be constructed in a building structure.
The column is an important component of a building structure. The main function of it is to transfer the loads from the superstructure to the foundation.
As per IS 13920, the Width (W) to Depth (D) ratio of a column should be greater than or equal to 0.4 and the minimum dimension of the member shall not be less than 200 mm. However, in frames that have beams with a Centre-to-Centre span exceeding 5 m or columns of unsupported length exceeding 4 m, the shortest dimension of the column shall not be less than 300 mm.
The size of a column depends on its ultimate axial load-carrying capacity and the grades of concrete & steel used to cast the element.
Before proceeding further, we must know what is Area of steel, the Area of concrete &, What is Gross area?
By the term Area of steel, we mean the total area of cross-section of all the steel bars provided in a section.
For illustration, if we have a column of size 230mm x 230mm provided with 4 number of 10mm steel bars, the area of steel for this column will be equal to 4 times the area of the cross-section of each bar or simply 4(π/4)D2. The Gross area is the total area of this section including the area of steel & the Area of concrete is the area of this section excluding the area of steel.
Must-have books for Civil Engineers;
The A to Z of Practical Building Construction and Its Management
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Building Planning and Drawing
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Illustrated Design of Reinforced Concrete Buildings ( Design of G+3 Storeyed Buildings + Earthquake Analysis & Design)
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Advanced Reinforced Concrete Design
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Limit State Design of Steel Structures
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Estimating and Costing in Civil Engineering (Theory and Practice)
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#columndesign #civiltutor #ermuyeenmubarak
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Compiled PDFs👇🏻
store.civiltutorofficial.com
👇🏻2nd channel👇🏻
@Civil Tutor Official
Please make a complete video on design of a whole building using these calculations🙏🙏🙏
I need this video like u 🤗🤗🤗🤗
very good technical and important information for civil engineers
This channel is GOLD!
This is really helpful you make it way simpler than the lecturer I had
Sir, please make a complete design and calculation of a 3 story building for practical uses..
You are outstanding sir💯👏🏻👍🏻
Excellent teaching sir
Practical design necessary for House Owners 🙏🇮🇳
I'm from Indonesia, Thank's for this your video tutorial. This great's for basic design
Reminder set on
Pu=0.40fck Ac+0.67 fyAsc For M20 and fy415 steel assuming 1% steel
Pu=0.40 x20 (0.99 Ag) +0.67x415 x0.01Ag
Pu=7.92Ag+2.7805 Ag =10.70 Ag.
In this Pu=950 x10^3 =10.70 Ag
Ag=950x10^3/10.70=88785.04673 mm^2
Assuming square section side of column=297.97mm say 300mm
We can Tabulate the various percentage of steel for M20 concrete and fy 415 steel
pt=0.80% Pu=8.16
1.0% Pu=10.70
1.50% Pu=12.05
2.0% Pu=13.40
2.50% Pu=14.75
3.0% Pu=16.10
For economical max percentage of steel may be 2.50% may be adopted. This is for simplication.
I love this channel
Good explanation
excellent column steel area , concrete area & gross area calculation rule & column size calculation rule # 👍👍👍
Thanks a lot
Thanks
great
Super
Liked n Subscribed 😊❤
Hello Sir, have you ever used PKPM for structural drawings?
Nice your place
Thanks for the great video - - I believe “mm” is “millimeters”
Sir, what is the formula to assume rectangular column ?
Sir how the loads applied on a column is calculated if we don't know the column dimension?
Make a complete video from roof slab to foundation
can you please make a video about steel column and joint?
I hope you do your videos in English...
Looking forward to watch ☺️
sir plz make a highway engineering course for me
How can we now a building have so much of load it can carry?
Sir, Please how did you come up with the "88785mm sq as the result?" Because the I add up (0.4x20x0.99+0.67x415x0.01) = 10.7005. thank you
kindly tell how to find dimensions of rectangular column by gross area
sir my doubt is about column stirrup.
recently I changed my massion bcoz of his poor knowledge work. my new massion suggested me to extend the stirrups bcoz of large column size actually my column size is 15×9 inch but stirrup dimesnion is 9×6 he suggest me to extend it to 12×6 but the problem here is to change all stirrups for total of 9columns . what will I do now. can I continue with old dimensions or to follow my new massion rules.
Sir, how we can decide the shape of the column in a location? I mean what are the factors that affect the decision of shaping a column whether square or circular?
For residential buildings where you need to do the brickwork between the columns its better to have a square or a rectangular section. If there are no walls then we can go for circular sections because they offer higher resistance to buckling than square or rectangular sections.
How to know how much load is acting
Bhai ji square size hi niklega kya rectangular size k liye kya h formula
Sir 'Pu' ki value kaise pata krni h..???
Column size toh baad Mai design ho payega 😲
What if w and d are equal?
w/d will not work
How we get to know that how much load is acting on it?.expecting a clear amswer..
I will make a separate video on load calculation in future.
@@CivilTutor its kinda needed answer for now...
@@CivilTutor as per my knowledge, should we consider ,dead load,live load ,self weight and slab load
@@Avis9989 Yes you are right. But while calculating slab load we should consider only 25% of the slab load.
Telugu lo chepandi pls
350x380 mm
A g wo g me hu man moji 1: 2: ka 4 .
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