Question
Download Solution PDFThe length of column is 3.5 m and its size is 350 × 350 mm. For this column, the minimum eccentricity is ______
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
As per IS 456: 2000, clause 25.4,
Minimum Eccentricity
All columns shall be designed for minimum eccentricity, equal to the addition of the unsupported length of column divided by 500 and lateral dimensions divided by 30, subject to a minimum of 20 mm.
Where biaxial bending is considered, it is sufficient to ensure that eccentricity exceeds the minimum about one axis at a time.
Calculation:
Given,
Unsupported length = 3500 mm
Size of the column = 350 mm
Minimum eccentricity = \(\frac{L}{{500}} + \frac{B}{{30}} \)
\(e_{min}= \;\frac{{3500}}{{500}} + \frac{{350}}{{30}} = 18.667\;mm\;\)
But, in no case, the minimum eccentricity should be less than 20 mm.
as e min < 20 mm.
The Minimum eccentricity = 20 mm
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