If a is the offset of concrete bed in cms, and d is the depth of concrete bed in cms, then
A. d = 0.445 a
B. d = 0.557 a
C. d = 0.775 a
D. None of these
Answer: Option B
Solution (By Examveda Team)
The relationship between the offset (a) and depth (d) of a concrete bed comes from the standard slope provided for bed concrete in foundations.In practice, the concrete bed is laid with side slopes of approximately 63° 26′.
Using this slope, the ratio between depth (d) and offset (a) becomes:
d = a × tan(26° 34′) ≈ 0.557 a
Thus, the correct proportional relationship between depth and offset of a concrete bed is:
d = 0.557 a
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