In a girder of rectangular cross-section, the longer side is used as
(A) length
(B) breadth
(C) depth
(D) all of above
Answers
Explanation:
It will be length....so option a is the correct answer
In a girder of rectangular cross-section, the longer side is used as Depth (Option C)
Explanation:
When a weight of 'W' is attached to the girder of length l, breadth b, and depth d with the horizontal support, the depression that is produced at the midpoint of the girder will be:
δ =
From this, we can determine that depression is inversely proportional to depth.
δ
Over b, the power of d makes the value larger. To keep the depression low, the value of depth 'd' needs to be high. So, depth is used as a longer side in a girder of rectangular cross-section.
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