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The effective height of a column of height H restrained fully at its top and partially at bottom is 

The effective height of a column of height H restrained fully at its top and partially at bottom is  Correct Answer 1.50 H

The effective length under various conditions as per IS 800:2007 is given below:

Degree of end restraint

Theoretical value

Recommended value

Effectively held in position and restrained against rotation at both ends.

0.50L

0.65L

Effectively held in position and restrained against rotation at one end

0.70L

0.80L

Effectively held in position at both ends, but not restrained against rotation.

1.00L

1.00L

Effectively held in position and restrained against rotation at one end and at other end restrained against rotation but not held in position

1.00L

1.20L

Effectively held in position and restrained against rotation at one end and at other end partially restrained against rotation but not held in position

-

1.50L

Effectively held in position at one end but not restrained against rotation and at other end restrained against rotation but not held in position.

2.00L

2.00L

Effectively held in position and restrained against rotation at one end and at other end not held in position and not restraint against rotation.

2.00 L

2.00L

 

Where L is the unsupported length of column or wall.

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