Civil Engineering - Estimating and Costing - Discussion

Discussion :: Estimating and Costing - Section 1 (Q.No.41)

41. 

The total length of a cranked bar through a distance (d) at 45° in case of a beam of effective length L, is

[A]. L + 0.42 d
[B]. L + 2 x 0.42 d
[C]. L - 0.42 d
[D]. L - 2 x 0.4 d

Answer: Option B

Explanation:

No answer description available for this question.

Jagdish said: (Nov 1, 2018)  
How? anyone explain me please.

Anjali said: (Sep 14, 2019)  
How it is come? Please explain the answer.

Mohd Asif Khan said: (Dec 26, 2019)  
Length of crank bar on one side= d/sin@ - d/tan@
= d/sin45° - d/tan45°
=0.42d.
Therefor total length of cranked bar on both sides = (L+2x0.42d).

Sachin S Naik said: (Jan 27, 2020)  
If bar cranked at 30 then extra length will be 2*0.27d.

Danish said: (May 10, 2020)  
Here it is not mentioned that crank is on both sides. So the answer must be A.
Crank is provided to resist negative BM.
Crank is provided to resist shear force.

Arun said: (Dec 4, 2020)  
Option A is correct because it is not mentioned about the crank on both sides.

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