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Question
In case of eccentrically loaded struts ............. is preferred.
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A.
Solid section
B.
Hollow section
C.
Composite section
D.
Reinforced section
Answer ( Option B)

Hollow section

Solution

For eccentrically loaded struts, the preferred section is a hollow section.
There are several reasons for this: 
1. Stiffness: A hollow section has a higher section modulus than a solid section of the same weight. This means that it is stiffer and can resist bending and torsion better than a solid section. 
 
2. Weight: A hollow section is lighter than a solid section of the same outer dimensions. This is because the material is distributed away from the centroid, reducing the moment of inertia. 
 
3. Cost: A hollow section is more cost-effective than a solid section of the same weight because less material is required.
 
4. Buckling: A hollow section is less prone to buckling than a solid section because the material is distributed away from the centroid.
 
5. Corrosion: A hollow section is less susceptible to corrosion than a solid section because the interior can be protected with coatings or cathodic protection.

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