Civil Engineering - RCC Structures Design - Discussion
Discussion Forum : RCC Structures Design - Section 4 (Q.No. 34)
34.
Columns may be made of plain concrete if their unsupported lengths do not exceed their least lateral dimension
Discussion:
19 comments Page 1 of 2.
Nithyanandham said:
7 years ago
This is stated in Old codebook SP 24-1983:
When the length of the compression member is less than three times the least lateral dimension it is called a pedestal.Pedestals can be of plain concrete also;
But in revised code IS 456 2000---the minimum reinforcement should be provided in all members to ensure the failure due to shrinkage, temperature.
When the length of the compression member is less than three times the least lateral dimension it is called a pedestal.Pedestals can be of plain concrete also;
But in revised code IS 456 2000---the minimum reinforcement should be provided in all members to ensure the failure due to shrinkage, temperature.
Maheshmeena said:
7 years ago
Leff>3times of least lateral dimension--column and leff<3times of least lateral dimension-- pedestal. But in question saying the unsupported length (leff) not exceed their least lateral dimension. So, it is more than 3times and here the answer is 4times.
Prasanna Gosavi said:
4 years ago
In the case of a pedestal, the unsupported length does not exceed three times the least lateral dimension.
The pedestal can either be designed as a PCC or RCC structure.
Here, such column is made of PCC, so it may be a case of pedestal.
The pedestal can either be designed as a PCC or RCC structure.
Here, such column is made of PCC, so it may be a case of pedestal.
Abhishek said:
8 years ago
According to IS 456 cl 26.5.3.1 minimum reinforcement for any column is 0.8% and for the pedestal, it's 0.15%.
So the question is wrong as per IS 456 as it will never be zero to make it a plain concrete column.
Clarify if I am wrong.
So the question is wrong as per IS 456 as it will never be zero to make it a plain concrete column.
Clarify if I am wrong.
Sohail said:
4 years ago
Coloum or strut is more than 3.
Pedestal is less than 3.
Because of unsupported length. So the answer is more than three is correct.
Pedestal is less than 3.
Because of unsupported length. So the answer is more than three is correct.
(1)
Raghul.s said:
5 years ago
Slenderness ratio: Less than 3 for pedestal, 3-12 for short column, greater than 12 long column. So the answer is 3.
Asif said:
8 years ago
It is the case of column not of pedestal so correct answer is four times.
Shreya said:
7 years ago
3 is right.
@Abhishek please read the question again.
@Abhishek please read the question again.
Sunil said:
8 years ago
Please give the right answer with the explanation.
Pramit Samanta said:
4 years ago
Minimum reinforcement in the pedestal is 15%.
(1)
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